Merge branch 'master' of https://github.com/eugenp/tutorials into task/BAEL-20665
# Conflicts: # core-groovy-2/src/test/groovy/com/baeldung/metaprogramming/MetaprogrammingUnitTest.groovy # core-java-modules/pom.xml # pom.xml
This commit is contained in:
commit
3cfc8d2163
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@ -15,5 +15,4 @@ This module contains articles about algorithms. Some classes of algorithms, e.g.
|
||||||
- [Creating a Triangle with for Loops in Java](https://www.baeldung.com/java-print-triangle)
|
- [Creating a Triangle with for Loops in Java](https://www.baeldung.com/java-print-triangle)
|
||||||
- [Efficient Word Frequency Calculator in Java](https://www.baeldung.com/java-word-frequency)
|
- [Efficient Word Frequency Calculator in Java](https://www.baeldung.com/java-word-frequency)
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||||||
- [The K-Means Clustering Algorithm in Java](https://www.baeldung.com/java-k-means-clustering-algorithm)
|
- [The K-Means Clustering Algorithm in Java](https://www.baeldung.com/java-k-means-clustering-algorithm)
|
||||||
- [Creating a Custom Annotation in Java](https://www.baeldung.com/java-custom-annotation)
|
|
||||||
- More articles: [[<-- prev]](/algorithms-miscellaneous-2) [[next -->]](/algorithms-miscellaneous-4)
|
- More articles: [[<-- prev]](/algorithms-miscellaneous-2) [[next -->]](/algorithms-miscellaneous-4)
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||||||
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|
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@ -15,7 +15,7 @@ public class GreedyAlgorithm {
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this.fp = new FollowersPath();
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this.fp = new FollowersPath();
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}
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}
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|
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public long findMostFollowersPath(String account) throws Exception {
|
public long findMostFollowersPath(String account) {
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long max = 0;
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long max = 0;
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SocialUser toFollow = null;
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SocialUser toFollow = null;
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@ -31,12 +31,8 @@ public class GreedyAlgorithm {
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if (currentLevel < maxLevel - 1) {
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if (currentLevel < maxLevel - 1) {
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currentLevel++;
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currentLevel++;
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max += findMostFollowersPath(toFollow.getUsername());
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max += findMostFollowersPath(toFollow.getUsername());
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//fp.addFollower(toFollow.getUsername(), max);
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//fp.addCount(max);
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return max;
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return max;
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} else {
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} else {
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//fp.addFollower(toFollow.getUsername(), max);
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//fp.addCount(max);
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return max;
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return max;
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}
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}
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}
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}
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|
|
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@ -14,8 +14,7 @@ public class NonGreedyAlgorithm {
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this.currentLevel = level;
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this.currentLevel = level;
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}
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}
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|
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|
public long findMostFollowersPath(String account) {
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public long findMostFollowersPath(String account) throws Exception {
|
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List<SocialUser> followers = tc.getFollowers(account);
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List<SocialUser> followers = tc.getFollowers(account);
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long total = currentLevel > 0 ? followers.size() : 0;
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long total = currentLevel > 0 ? followers.size() : 0;
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@ -20,9 +20,9 @@ public class SocialConnector {
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return this.isCounterEnabled;
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return this.isCounterEnabled;
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}
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}
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public List<SocialUser> getFollowers(String account) throws Exception {
|
public List<SocialUser> getFollowers(String account) {
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if (counter < 0)
|
if (counter < 0)
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throw new Exception ("API limit reached");
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throw new IllegalStateException ("API limit reached");
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else {
|
else {
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if(this.isCounterEnabled) counter--;
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if(this.isCounterEnabled) counter--;
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for(SocialUser user : users) {
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for(SocialUser user : users) {
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|
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@ -0,0 +1,13 @@
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package com.baeldung.algorithms.minheapmerge;
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public class HeapNode {
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int element;
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int arrayIndex;
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int nextElementIndex = 1;
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|
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public HeapNode(int element, int arrayIndex) {
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this.element = element;
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this.arrayIndex = arrayIndex;
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}
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}
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@ -0,0 +1,88 @@
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package com.baeldung.algorithms.minheapmerge;
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public class MinHeap {
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HeapNode[] heapNodes;
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public MinHeap(HeapNode heapNodes[]) {
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|
this.heapNodes = heapNodes;
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|
heapifyFromLastLeafsParent();
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|
}
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||||||
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||||||
|
void heapifyFromLastLeafsParent() {
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|
int lastLeafsParentIndex = getParentNodeIndex(heapNodes.length);
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||||||
|
while (lastLeafsParentIndex >= 0) {
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|
heapify(lastLeafsParentIndex);
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|
lastLeafsParentIndex--;
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|
}
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||||||
|
}
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|
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|
void heapify(int index) {
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|
int leftNodeIndex = getLeftNodeIndex(index);
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|
int rightNodeIndex = getRightNodeIndex(index);
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|
int smallestElementIndex = index;
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if (leftNodeIndex < heapNodes.length && heapNodes[leftNodeIndex].element < heapNodes[index].element) {
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smallestElementIndex = leftNodeIndex;
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|
}
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|
if (rightNodeIndex < heapNodes.length && heapNodes[rightNodeIndex].element < heapNodes[smallestElementIndex].element) {
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|
smallestElementIndex = rightNodeIndex;
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|
}
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|
if (smallestElementIndex != index) {
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|
swap(index, smallestElementIndex);
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heapify(smallestElementIndex);
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|
}
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||||||
|
}
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|
int getParentNodeIndex(int index) {
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|
return (index - 1) / 2;
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|
}
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||||||
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|
||||||
|
int getLeftNodeIndex(int index) {
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|
return (2 * index + 1);
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||||||
|
}
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||||||
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||||||
|
int getRightNodeIndex(int index) {
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||||||
|
return (2 * index + 2);
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||||||
|
}
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||||||
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|
||||||
|
HeapNode getRootNode() {
|
||||||
|
return heapNodes[0];
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||||||
|
}
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||||||
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void heapifyFromRoot() {
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heapify(0);
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||||||
|
}
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||||||
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||||||
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void swap(int i, int j) {
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|
HeapNode temp = heapNodes[i];
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heapNodes[i] = heapNodes[j];
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heapNodes[j] = temp;
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||||||
|
}
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static int[] merge(int[][] array) {
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||||||
|
HeapNode[] heapNodes = new HeapNode[array.length];
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int resultingArraySize = 0;
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|
for (int i = 0; i < array.length; i++) {
|
||||||
|
HeapNode node = new HeapNode(array[i][0], i);
|
||||||
|
heapNodes[i] = node;
|
||||||
|
resultingArraySize += array[i].length;
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|
}
|
||||||
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|
||||||
|
MinHeap minHeap = new MinHeap(heapNodes);
|
||||||
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int[] resultingArray = new int[resultingArraySize];
|
||||||
|
|
||||||
|
for (int i = 0; i < resultingArraySize; i++) {
|
||||||
|
HeapNode root = minHeap.getRootNode();
|
||||||
|
resultingArray[i] = root.element;
|
||||||
|
|
||||||
|
if (root.nextElementIndex < array[root.arrayIndex].length) {
|
||||||
|
root.element = array[root.arrayIndex][root.nextElementIndex++];
|
||||||
|
} else {
|
||||||
|
root.element = Integer.MAX_VALUE;
|
||||||
|
}
|
||||||
|
minHeap.heapifyFromRoot();
|
||||||
|
}
|
||||||
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return resultingArray;
|
||||||
|
}
|
||||||
|
}
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|
@ -35,21 +35,21 @@ public class GreedyAlgorithmUnitTest {
|
||||||
}
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}
|
||||||
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|
||||||
@Test
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@Test
|
||||||
public void greedyAlgorithmTest() throws Exception {
|
public void greedyAlgorithmTest() {
|
||||||
GreedyAlgorithm ga = new GreedyAlgorithm(prepareNetwork());
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GreedyAlgorithm ga = new GreedyAlgorithm(prepareNetwork());
|
||||||
assertEquals(ga.findMostFollowersPath("root"), 5);
|
assertEquals(ga.findMostFollowersPath("root"), 5);
|
||||||
}
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}
|
||||||
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|
||||||
@Test
|
@Test
|
||||||
public void nongreedyAlgorithmTest() throws Exception {
|
public void nongreedyAlgorithmTest() {
|
||||||
NonGreedyAlgorithm nga = new NonGreedyAlgorithm(prepareNetwork(), 0);
|
NonGreedyAlgorithm nga = new NonGreedyAlgorithm(prepareNetwork(), 0);
|
||||||
Assertions.assertThrows(Exception.class, () -> {
|
Assertions.assertThrows(IllegalStateException.class, () -> {
|
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nga.findMostFollowersPath("root");
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nga.findMostFollowersPath("root");
|
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});
|
});
|
||||||
}
|
}
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||||||
|
|
||||||
@Test
|
@Test
|
||||||
public void nongreedyAlgorithmUnboundedTest() throws Exception {
|
public void nongreedyAlgorithmUnboundedTest() {
|
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SocialConnector sc = prepareNetwork();
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SocialConnector sc = prepareNetwork();
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sc.switchCounter();
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sc.switchCounter();
|
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NonGreedyAlgorithm nga = new NonGreedyAlgorithm(sc, 0);
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NonGreedyAlgorithm nga = new NonGreedyAlgorithm(sc, 0);
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@ -0,0 +1,22 @@
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||||||
|
package com.baeldung.algorithms.minheapmerge;
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|
|
||||||
|
import static org.hamcrest.CoreMatchers.equalTo;
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|
import static org.hamcrest.CoreMatchers.is;
|
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|
import static org.junit.Assert.assertThat;
|
||||||
|
|
||||||
|
import org.junit.Test;
|
||||||
|
|
||||||
|
public class MinHeapUnitTest {
|
||||||
|
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||||||
|
private final int[][] inputArray = { { 0, 6 }, { 1, 5, 10, 100 }, { 2, 4, 200, 650 } };
|
||||||
|
private final int[] expectedArray = { 0, 1, 2, 4, 5, 6, 10, 100, 200, 650 };
|
||||||
|
|
||||||
|
@Test
|
||||||
|
public void givenSortedArrays_whenMerged_thenShouldReturnASingleSortedarray() {
|
||||||
|
int[] resultArray = MinHeap.merge(inputArray);
|
||||||
|
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||||||
|
assertThat(resultArray.length, is(equalTo(10)));
|
||||||
|
assertThat(resultArray, is(equalTo(expectedArray)));
|
||||||
|
}
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||||||
|
|
||||||
|
}
|
|
@ -9,3 +9,4 @@ This module contains articles about searching algorithms.
|
||||||
- [Breadth-First Search Algorithm in Java](https://www.baeldung.com/java-breadth-first-search)
|
- [Breadth-First Search Algorithm in Java](https://www.baeldung.com/java-breadth-first-search)
|
||||||
- [String Search Algorithms for Large Texts](https://www.baeldung.com/java-full-text-search-algorithms)
|
- [String Search Algorithms for Large Texts](https://www.baeldung.com/java-full-text-search-algorithms)
|
||||||
- [Monte Carlo Tree Search for Tic-Tac-Toe Game](https://www.baeldung.com/java-monte-carlo-tree-search)
|
- [Monte Carlo Tree Search for Tic-Tac-Toe Game](https://www.baeldung.com/java-monte-carlo-tree-search)
|
||||||
|
- [Range Search Algorithm in Java](https://www.baeldung.com/java-range-search)
|
||||||
|
|
|
@ -0,0 +1,4 @@
|
||||||
|
/target/
|
||||||
|
.settings/
|
||||||
|
.classpath
|
||||||
|
.project
|
|
@ -0,0 +1,64 @@
|
||||||
|
<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://maven.apache.org/POM/4.0.0"
|
||||||
|
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
|
||||||
|
<modelVersion>4.0.0</modelVersion>
|
||||||
|
<artifactId>algorithms-sorting-2</artifactId>
|
||||||
|
<version>0.0.1-SNAPSHOT</version>
|
||||||
|
<name>algorithms-sorting-2</name>
|
||||||
|
|
||||||
|
<parent>
|
||||||
|
<groupId>com.baeldung</groupId>
|
||||||
|
<artifactId>parent-modules</artifactId>
|
||||||
|
<version>1.0.0-SNAPSHOT</version>
|
||||||
|
</parent>
|
||||||
|
|
||||||
|
<dependencies>
|
||||||
|
<dependency>
|
||||||
|
<groupId>org.apache.commons</groupId>
|
||||||
|
<artifactId>commons-math3</artifactId>
|
||||||
|
<version>${commons-math3.version}</version>
|
||||||
|
</dependency>
|
||||||
|
<dependency>
|
||||||
|
<groupId>commons-codec</groupId>
|
||||||
|
<artifactId>commons-codec</artifactId>
|
||||||
|
<version>${commons-codec.version}</version>
|
||||||
|
</dependency>
|
||||||
|
<dependency>
|
||||||
|
<groupId>org.projectlombok</groupId>
|
||||||
|
<artifactId>lombok</artifactId>
|
||||||
|
<version>${lombok.version}</version>
|
||||||
|
<scope>provided</scope>
|
||||||
|
</dependency>
|
||||||
|
<dependency>
|
||||||
|
<groupId>org.junit.jupiter</groupId>
|
||||||
|
<artifactId>junit-jupiter-api</artifactId>
|
||||||
|
<version>${junit-jupiter-api.version}</version>
|
||||||
|
<scope>test</scope>
|
||||||
|
</dependency>
|
||||||
|
<dependency>
|
||||||
|
<groupId>org.assertj</groupId>
|
||||||
|
<artifactId>assertj-core</artifactId>
|
||||||
|
<version>${org.assertj.core.version}</version>
|
||||||
|
<scope>test</scope>
|
||||||
|
</dependency>
|
||||||
|
</dependencies>
|
||||||
|
|
||||||
|
<build>
|
||||||
|
<pluginManagement>
|
||||||
|
<plugins>
|
||||||
|
<plugin>
|
||||||
|
<groupId>org.codehaus.mojo</groupId>
|
||||||
|
<artifactId>exec-maven-plugin</artifactId>
|
||||||
|
<version>${exec-maven-plugin.version}</version>
|
||||||
|
</plugin>
|
||||||
|
</plugins>
|
||||||
|
</pluginManagement>
|
||||||
|
</build>
|
||||||
|
|
||||||
|
<properties>
|
||||||
|
<commons-math3.version>3.6.1</commons-math3.version>
|
||||||
|
<org.assertj.core.version>3.9.0</org.assertj.core.version>
|
||||||
|
<commons-codec.version>1.11</commons-codec.version>
|
||||||
|
<junit-jupiter-api.version>5.3.1</junit-jupiter-api.version>
|
||||||
|
</properties>
|
||||||
|
|
||||||
|
</project>
|
|
@ -0,0 +1,66 @@
|
||||||
|
package com.baeldung.algorithms.quicksort;
|
||||||
|
|
||||||
|
import static com.baeldung.algorithms.quicksort.SortingUtils.swap;
|
||||||
|
|
||||||
|
public class BentleyMcIlroyPartioning {
|
||||||
|
|
||||||
|
public static Partition partition(int input[], int begin, int end) {
|
||||||
|
int left = begin, right = end;
|
||||||
|
int leftEqualKeysCount = 0, rightEqualKeysCount = 0;
|
||||||
|
|
||||||
|
int partitioningValue = input[end];
|
||||||
|
|
||||||
|
while (true) {
|
||||||
|
while (input[left] < partitioningValue)
|
||||||
|
left++;
|
||||||
|
|
||||||
|
while (input[right] > partitioningValue) {
|
||||||
|
if (right == begin)
|
||||||
|
break;
|
||||||
|
right--;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (left == right && input[left] == partitioningValue) {
|
||||||
|
swap(input, begin + leftEqualKeysCount, left);
|
||||||
|
leftEqualKeysCount++;
|
||||||
|
left++;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (left >= right) {
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
|
||||||
|
swap(input, left, right);
|
||||||
|
|
||||||
|
if (input[left] == partitioningValue) {
|
||||||
|
swap(input, begin + leftEqualKeysCount, left);
|
||||||
|
leftEqualKeysCount++;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (input[right] == partitioningValue) {
|
||||||
|
swap(input, right, end - rightEqualKeysCount);
|
||||||
|
rightEqualKeysCount++;
|
||||||
|
}
|
||||||
|
left++; right--;
|
||||||
|
}
|
||||||
|
right = left - 1;
|
||||||
|
for (int k = begin; k < begin + leftEqualKeysCount; k++, right--) {
|
||||||
|
if (right >= begin + leftEqualKeysCount)
|
||||||
|
swap(input, k, right);
|
||||||
|
}
|
||||||
|
for (int k = end; k > end - rightEqualKeysCount; k--, left++) {
|
||||||
|
if (left <= end - rightEqualKeysCount)
|
||||||
|
swap(input, left, k);
|
||||||
|
}
|
||||||
|
return new Partition(right + 1, left - 1);
|
||||||
|
}
|
||||||
|
|
||||||
|
public static void quicksort(int input[], int begin, int end) {
|
||||||
|
if (end <= begin)
|
||||||
|
return;
|
||||||
|
Partition middlePartition = partition(input, begin, end);
|
||||||
|
quicksort(input, begin, middlePartition.getLeft() - 1);
|
||||||
|
quicksort(input, middlePartition.getRight() + 1, end);
|
||||||
|
}
|
||||||
|
|
||||||
|
}
|
|
@ -0,0 +1,38 @@
|
||||||
|
package com.baeldung.algorithms.quicksort;
|
||||||
|
|
||||||
|
import static com.baeldung.algorithms.quicksort.SortingUtils.compare;
|
||||||
|
import static com.baeldung.algorithms.quicksort.SortingUtils.swap;
|
||||||
|
|
||||||
|
public class DutchNationalFlagPartioning {
|
||||||
|
|
||||||
|
public static Partition partition(int[] a, int begin, int end) {
|
||||||
|
int lt = begin, current = begin, gt = end;
|
||||||
|
int partitioningValue = a[begin];
|
||||||
|
|
||||||
|
while (current <= gt) {
|
||||||
|
int compareCurrent = compare(a[current], partitioningValue);
|
||||||
|
switch (compareCurrent) {
|
||||||
|
case -1:
|
||||||
|
swap(a, current++, lt++);
|
||||||
|
break;
|
||||||
|
case 0:
|
||||||
|
current++;
|
||||||
|
break;
|
||||||
|
case 1:
|
||||||
|
swap(a, current, gt--);
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
return new Partition(lt, gt);
|
||||||
|
}
|
||||||
|
|
||||||
|
public static void quicksort(int[] input, int begin, int end) {
|
||||||
|
if (end <= begin)
|
||||||
|
return;
|
||||||
|
|
||||||
|
Partition middlePartition = partition(input, begin, end);
|
||||||
|
|
||||||
|
quicksort(input, begin, middlePartition.getLeft() - 1);
|
||||||
|
quicksort(input, middlePartition.getRight() + 1, end);
|
||||||
|
}
|
||||||
|
}
|
|
@ -0,0 +1,29 @@
|
||||||
|
package com.baeldung.algorithms.quicksort;
|
||||||
|
|
||||||
|
public class Partition {
|
||||||
|
private int left;
|
||||||
|
private int right;
|
||||||
|
|
||||||
|
public Partition(int left, int right) {
|
||||||
|
super();
|
||||||
|
this.left = left;
|
||||||
|
this.right = right;
|
||||||
|
}
|
||||||
|
|
||||||
|
public int getLeft() {
|
||||||
|
return left;
|
||||||
|
}
|
||||||
|
|
||||||
|
public void setLeft(int left) {
|
||||||
|
this.left = left;
|
||||||
|
}
|
||||||
|
|
||||||
|
public int getRight() {
|
||||||
|
return right;
|
||||||
|
}
|
||||||
|
|
||||||
|
public void setRight(int right) {
|
||||||
|
this.right = right;
|
||||||
|
}
|
||||||
|
|
||||||
|
}
|
|
@ -0,0 +1,32 @@
|
||||||
|
package com.baeldung.algorithms.quicksort;
|
||||||
|
|
||||||
|
public class SortingUtils {
|
||||||
|
|
||||||
|
public static void swap(int[] array, int position1, int position2) {
|
||||||
|
if (position1 != position2) {
|
||||||
|
int temp = array[position1];
|
||||||
|
array[position1] = array[position2];
|
||||||
|
array[position2] = temp;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
public static int compare(int num1, int num2) {
|
||||||
|
if (num1 > num2)
|
||||||
|
return 1;
|
||||||
|
else if (num1 < num2)
|
||||||
|
return -1;
|
||||||
|
else
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
public static void printArray(int[] array) {
|
||||||
|
if (array == null) {
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
for (int e : array) {
|
||||||
|
System.out.print(e + " ");
|
||||||
|
}
|
||||||
|
System.out.println();
|
||||||
|
}
|
||||||
|
|
||||||
|
}
|
|
@ -0,0 +1,13 @@
|
||||||
|
<?xml version="1.0" encoding="UTF-8"?>
|
||||||
|
<configuration>
|
||||||
|
<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
|
||||||
|
<encoder>
|
||||||
|
<pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n
|
||||||
|
</pattern>
|
||||||
|
</encoder>
|
||||||
|
</appender>
|
||||||
|
|
||||||
|
<root level="INFO">
|
||||||
|
<appender-ref ref="STDOUT"/>
|
||||||
|
</root>
|
||||||
|
</configuration>
|
|
@ -0,0 +1,16 @@
|
||||||
|
package com.baeldung.algorithms.quicksort;
|
||||||
|
|
||||||
|
import org.junit.Assert;
|
||||||
|
import org.junit.Test;
|
||||||
|
|
||||||
|
public class BentleyMcilroyPartitioningUnitTest {
|
||||||
|
|
||||||
|
@Test
|
||||||
|
public void given_IntegerArray_whenSortedWithBentleyMcilroyPartitioning_thenGetSortedArray() {
|
||||||
|
int[] actual = {3, 2, 2, 2, 3, 7, 7, 3, 2, 2, 7, 3, 3};
|
||||||
|
int[] expected = {2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 7, 7, 7};
|
||||||
|
BentleyMcIlroyPartioning.quicksort(actual, 0, actual.length - 1);
|
||||||
|
Assert.assertArrayEquals(expected, actual);
|
||||||
|
}
|
||||||
|
|
||||||
|
}
|
|
@ -0,0 +1,15 @@
|
||||||
|
package com.baeldung.algorithms.quicksort;
|
||||||
|
|
||||||
|
import org.junit.Assert;
|
||||||
|
import org.junit.Test;
|
||||||
|
|
||||||
|
public class DNFThreeWayQuickSortUnitTest {
|
||||||
|
|
||||||
|
@Test
|
||||||
|
public void givenIntegerArray_whenSortedWithThreeWayQuickSort_thenGetSortedArray() {
|
||||||
|
int[] actual = {3, 5, 5, 5, 3, 7, 7, 3, 5, 5, 7, 3, 3};
|
||||||
|
int[] expected = {3, 3, 3, 3, 3, 5, 5, 5, 5, 5, 7, 7, 7};
|
||||||
|
DutchNationalFlagPartioning.quicksort(actual, 0, actual.length - 1);
|
||||||
|
Assert.assertArrayEquals(expected, actual);
|
||||||
|
}
|
||||||
|
}
|
|
@ -32,7 +32,7 @@
|
||||||
</dependencies>
|
</dependencies>
|
||||||
|
|
||||||
<properties>
|
<properties>
|
||||||
<poi.version>3.15</poi.version>
|
<poi.version>4.1.1</poi.version>
|
||||||
<jexcel.version>1.0.6</jexcel.version>
|
<jexcel.version>1.0.6</jexcel.version>
|
||||||
</properties>
|
</properties>
|
||||||
|
|
||||||
|
|
|
@ -0,0 +1,20 @@
|
||||||
|
package com.baeldung.poi.excel;
|
||||||
|
|
||||||
|
import org.apache.poi.ss.usermodel.Cell;
|
||||||
|
import org.apache.poi.ss.usermodel.DataFormatter;
|
||||||
|
import org.apache.poi.ss.usermodel.FormulaEvaluator;
|
||||||
|
import org.apache.poi.ss.usermodel.Workbook;
|
||||||
|
|
||||||
|
public class ExcelCellFormatter {
|
||||||
|
|
||||||
|
public String getCellStringValue(Cell cell) {
|
||||||
|
DataFormatter formatter = new DataFormatter();
|
||||||
|
return formatter.formatCellValue(cell);
|
||||||
|
}
|
||||||
|
|
||||||
|
public String getCellStringValueWithFormula(Cell cell, Workbook workbook) {
|
||||||
|
DataFormatter formatter = new DataFormatter();
|
||||||
|
FormulaEvaluator evaluator = workbook.getCreationHelper().createFormulaEvaluator();
|
||||||
|
return formatter.formatCellValue(cell, evaluator);
|
||||||
|
}
|
||||||
|
}
|
|
@ -0,0 +1,83 @@
|
||||||
|
package com.baeldung.poi.excel.read.cellvalueandnotformula;
|
||||||
|
|
||||||
|
import java.io.File;
|
||||||
|
import java.io.FileInputStream;
|
||||||
|
import java.io.IOException;
|
||||||
|
|
||||||
|
import org.apache.poi.ss.usermodel.Cell;
|
||||||
|
import org.apache.poi.ss.usermodel.CellType;
|
||||||
|
import org.apache.poi.ss.usermodel.FormulaEvaluator;
|
||||||
|
import org.apache.poi.ss.usermodel.Row;
|
||||||
|
import org.apache.poi.ss.usermodel.Sheet;
|
||||||
|
import org.apache.poi.ss.usermodel.Workbook;
|
||||||
|
import org.apache.poi.ss.util.CellAddress;
|
||||||
|
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
|
||||||
|
|
||||||
|
public class CellValueAndNotFormulaHelper {
|
||||||
|
|
||||||
|
public Object getCellValueByFetchingLastCachedValue(String fileLocation, String cellLocation) throws IOException {
|
||||||
|
Object cellValue = new Object();
|
||||||
|
|
||||||
|
FileInputStream inputStream = new FileInputStream(new File(fileLocation));
|
||||||
|
Workbook workbook = new XSSFWorkbook(inputStream);
|
||||||
|
|
||||||
|
Sheet sheet = workbook.getSheetAt(0);
|
||||||
|
|
||||||
|
CellAddress cellAddress = new CellAddress(cellLocation);
|
||||||
|
Row row = sheet.getRow(cellAddress.getRow());
|
||||||
|
Cell cell = row.getCell(cellAddress.getColumn());
|
||||||
|
|
||||||
|
if (cell.getCellType() == CellType.FORMULA) {
|
||||||
|
switch (cell.getCachedFormulaResultType()) {
|
||||||
|
case BOOLEAN:
|
||||||
|
cellValue = cell.getBooleanCellValue();
|
||||||
|
break;
|
||||||
|
case NUMERIC:
|
||||||
|
cellValue = cell.getNumericCellValue();
|
||||||
|
break;
|
||||||
|
case STRING:
|
||||||
|
cellValue = cell.getStringCellValue();
|
||||||
|
break;
|
||||||
|
default:
|
||||||
|
cellValue = null;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
workbook.close();
|
||||||
|
return cellValue;
|
||||||
|
}
|
||||||
|
|
||||||
|
public Object getCellValueByEvaluatingFormula(String fileLocation, String cellLocation) throws IOException {
|
||||||
|
Object cellValue = new Object();
|
||||||
|
|
||||||
|
FileInputStream inputStream = new FileInputStream(new File(fileLocation));
|
||||||
|
Workbook workbook = new XSSFWorkbook(inputStream);
|
||||||
|
|
||||||
|
Sheet sheet = workbook.getSheetAt(0);
|
||||||
|
FormulaEvaluator evaluator = workbook.getCreationHelper()
|
||||||
|
.createFormulaEvaluator();
|
||||||
|
|
||||||
|
CellAddress cellAddress = new CellAddress(cellLocation);
|
||||||
|
Row row = sheet.getRow(cellAddress.getRow());
|
||||||
|
Cell cell = row.getCell(cellAddress.getColumn());
|
||||||
|
|
||||||
|
if (cell.getCellType() == CellType.FORMULA) {
|
||||||
|
switch (evaluator.evaluateFormulaCell(cell)) {
|
||||||
|
case BOOLEAN:
|
||||||
|
cellValue = cell.getBooleanCellValue();
|
||||||
|
break;
|
||||||
|
case NUMERIC:
|
||||||
|
cellValue = cell.getNumericCellValue();
|
||||||
|
break;
|
||||||
|
case STRING:
|
||||||
|
cellValue = cell.getStringCellValue();
|
||||||
|
break;
|
||||||
|
default:
|
||||||
|
cellValue = null;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
workbook.close();
|
||||||
|
return cellValue;
|
||||||
|
}
|
||||||
|
}
|
Binary file not shown.
Binary file not shown.
|
@ -0,0 +1,87 @@
|
||||||
|
package com.baeldung.poi.excel;
|
||||||
|
|
||||||
|
import static org.junit.Assert.assertEquals;
|
||||||
|
|
||||||
|
import java.io.IOException;
|
||||||
|
import java.net.URISyntaxException;
|
||||||
|
import java.nio.file.Paths;
|
||||||
|
|
||||||
|
import org.apache.poi.ss.usermodel.Row;
|
||||||
|
import org.apache.poi.ss.usermodel.Sheet;
|
||||||
|
import org.apache.poi.ss.usermodel.Workbook;
|
||||||
|
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
|
||||||
|
import org.junit.Before;
|
||||||
|
import org.junit.Test;
|
||||||
|
|
||||||
|
public class ExcelCellFormatterUnitTest {
|
||||||
|
private static final String FILE_NAME = "ExcelCellFormatterTest.xlsx";
|
||||||
|
private static final int STRING_CELL_INDEX = 0;
|
||||||
|
private static final int BOOLEAN_CELL_INDEX = 1;
|
||||||
|
private static final int RAW_NUMERIC_CELL_INDEX = 2;
|
||||||
|
private static final int FORMATTED_NUMERIC_CELL_INDEX = 3;
|
||||||
|
private static final int FORMULA_CELL_INDEX = 4;
|
||||||
|
|
||||||
|
private String fileLocation;
|
||||||
|
|
||||||
|
@Before
|
||||||
|
public void setup() throws IOException, URISyntaxException {
|
||||||
|
fileLocation = Paths.get(ClassLoader.getSystemResource(FILE_NAME).toURI()).toString();
|
||||||
|
}
|
||||||
|
|
||||||
|
@Test
|
||||||
|
public void givenStringCell_whenGetCellStringValue_thenReturnStringValue() throws IOException {
|
||||||
|
Workbook workbook = new XSSFWorkbook(fileLocation);
|
||||||
|
Sheet sheet = workbook.getSheetAt(0);
|
||||||
|
Row row = sheet.getRow(0);
|
||||||
|
|
||||||
|
ExcelCellFormatter formatter = new ExcelCellFormatter();
|
||||||
|
assertEquals("String Test", formatter.getCellStringValue(row.getCell(STRING_CELL_INDEX)));
|
||||||
|
workbook.close();
|
||||||
|
}
|
||||||
|
|
||||||
|
@Test
|
||||||
|
public void givenBooleanCell_whenGetCellStringValue_thenReturnBooleanStringValue() throws IOException {
|
||||||
|
Workbook workbook = new XSSFWorkbook(fileLocation);
|
||||||
|
Sheet sheet = workbook.getSheetAt(0);
|
||||||
|
Row row = sheet.getRow(0);
|
||||||
|
|
||||||
|
ExcelCellFormatter formatter = new ExcelCellFormatter();
|
||||||
|
assertEquals("TRUE", formatter.getCellStringValue(row.getCell(BOOLEAN_CELL_INDEX)));
|
||||||
|
workbook.close();
|
||||||
|
}
|
||||||
|
|
||||||
|
@Test
|
||||||
|
public void givenNumericCell_whenGetCellStringValue_thenReturnNumericStringValue() throws IOException {
|
||||||
|
Workbook workbook = new XSSFWorkbook(fileLocation);
|
||||||
|
Sheet sheet = workbook.getSheetAt(0);
|
||||||
|
Row row = sheet.getRow(0);
|
||||||
|
|
||||||
|
ExcelCellFormatter formatter = new ExcelCellFormatter();
|
||||||
|
assertEquals("1.234", formatter.getCellStringValue(row.getCell(RAW_NUMERIC_CELL_INDEX)));
|
||||||
|
assertEquals("1.23", formatter.getCellStringValue(row.getCell(FORMATTED_NUMERIC_CELL_INDEX)));
|
||||||
|
workbook.close();
|
||||||
|
}
|
||||||
|
|
||||||
|
@Test
|
||||||
|
public void givenFormualCell_whenGetCellStringValue_thenReturnOriginalFormulaString() throws IOException {
|
||||||
|
Workbook workbook = new XSSFWorkbook(fileLocation);
|
||||||
|
Sheet sheet = workbook.getSheetAt(0);
|
||||||
|
Row row = sheet.getRow(0);
|
||||||
|
|
||||||
|
ExcelCellFormatter formatter = new ExcelCellFormatter();
|
||||||
|
assertEquals("SUM(1+2)", formatter.getCellStringValue(row.getCell(FORMULA_CELL_INDEX)));
|
||||||
|
workbook.close();
|
||||||
|
}
|
||||||
|
|
||||||
|
@Test
|
||||||
|
public void givenFormualCell_whenGetCellStringValueForFormula_thenReturnOriginalFormulatring() throws IOException {
|
||||||
|
Workbook workbook = new XSSFWorkbook(fileLocation);
|
||||||
|
Sheet sheet = workbook.getSheetAt(0);
|
||||||
|
Row row = sheet.getRow(0);
|
||||||
|
|
||||||
|
ExcelCellFormatter formatter = new ExcelCellFormatter();
|
||||||
|
assertEquals("3", formatter.getCellStringValueWithFormula(row.getCell(FORMULA_CELL_INDEX), workbook));
|
||||||
|
workbook.close();
|
||||||
|
}
|
||||||
|
|
||||||
|
}
|
|
@ -0,0 +1,39 @@
|
||||||
|
package com.baeldung.poi.excel.read.cellvalueandnotformula;
|
||||||
|
|
||||||
|
import static org.junit.jupiter.api.Assertions.assertEquals;
|
||||||
|
|
||||||
|
import java.io.IOException;
|
||||||
|
import java.net.URISyntaxException;
|
||||||
|
import java.nio.file.Paths;
|
||||||
|
|
||||||
|
import org.junit.Before;
|
||||||
|
import org.junit.Test;
|
||||||
|
|
||||||
|
public class CellValueAndNotFormulaUnitTest {
|
||||||
|
|
||||||
|
private CellValueAndNotFormulaHelper readCellValueAndNotFormulaHelper;
|
||||||
|
private String fileLocation;
|
||||||
|
private static final String FILE_NAME = "test.xlsx";
|
||||||
|
|
||||||
|
@Before
|
||||||
|
public void setup() throws URISyntaxException {
|
||||||
|
fileLocation = Paths.get(ClassLoader.getSystemResource(FILE_NAME).toURI()).toString();
|
||||||
|
readCellValueAndNotFormulaHelper = new CellValueAndNotFormulaHelper();
|
||||||
|
}
|
||||||
|
|
||||||
|
@Test
|
||||||
|
public void givenExcelCell_whenReadCellValueByLastCachedValue_thenProduceCorrectResult() throws IOException {
|
||||||
|
final double expectedResult = 7.0;
|
||||||
|
final Object cellValue = readCellValueAndNotFormulaHelper.getCellValueByFetchingLastCachedValue(fileLocation, "C2");
|
||||||
|
|
||||||
|
assertEquals(expectedResult, cellValue);
|
||||||
|
}
|
||||||
|
|
||||||
|
@Test
|
||||||
|
public void givenExcelCell_whenReadCellValueByEvaluatingFormula_thenProduceCorrectResult() throws IOException {
|
||||||
|
final double expectedResult = 7.0;
|
||||||
|
final Object cellValue = readCellValueAndNotFormulaHelper.getCellValueByEvaluatingFormula(fileLocation, "C2");
|
||||||
|
|
||||||
|
assertEquals(expectedResult, cellValue);
|
||||||
|
}
|
||||||
|
}
|
|
@ -0,0 +1,5 @@
|
||||||
|
## Apache RocketMQ
|
||||||
|
|
||||||
|
This module contains articles about Apache RocketMQ
|
||||||
|
|
||||||
|
### Relevant Articles:
|
|
@ -0,0 +1,27 @@
|
||||||
|
<?xml version="1.0" encoding="UTF-8"?>
|
||||||
|
<project xmlns="http://maven.apache.org/POM/4.0.0"
|
||||||
|
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
|
||||||
|
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
|
||||||
|
<modelVersion>4.0.0</modelVersion>
|
||||||
|
<artifactId>apache-rocketmq</artifactId>
|
||||||
|
<version>1.0-SNAPSHOT</version>
|
||||||
|
<name>apache-rocketmq</name>
|
||||||
|
|
||||||
|
<parent>
|
||||||
|
<groupId>com.baeldung</groupId>
|
||||||
|
<artifactId>parent-modules</artifactId>
|
||||||
|
<version>1.0.0-SNAPSHOT</version>
|
||||||
|
</parent>
|
||||||
|
|
||||||
|
<dependencies>
|
||||||
|
<dependency>
|
||||||
|
<groupId>org.apache.rocketmq</groupId>
|
||||||
|
<artifactId>rocketmq-spring-boot-starter</artifactId>
|
||||||
|
<version>2.0.4</version>
|
||||||
|
</dependency>
|
||||||
|
</dependencies>
|
||||||
|
|
||||||
|
<properties>
|
||||||
|
<geode.core>1.6.0</geode.core>
|
||||||
|
</properties>
|
||||||
|
</project>
|
|
@ -0,0 +1,34 @@
|
||||||
|
package com.baeldung.rocketmq.consumer;
|
||||||
|
|
||||||
|
import com.baeldung.rocketmq.event.CartItemEvent;
|
||||||
|
import org.apache.rocketmq.spring.annotation.RocketMQMessageListener;
|
||||||
|
import org.apache.rocketmq.spring.core.RocketMQListener;
|
||||||
|
import org.springframework.boot.SpringApplication;
|
||||||
|
import org.springframework.boot.autoconfigure.SpringBootApplication;
|
||||||
|
import org.springframework.stereotype.Service;
|
||||||
|
|
||||||
|
@SpringBootApplication
|
||||||
|
public class CartEventConsumer {
|
||||||
|
|
||||||
|
public static void main(String[] args) {
|
||||||
|
SpringApplication.run(CartEventConsumer.class, args);
|
||||||
|
}
|
||||||
|
|
||||||
|
@Service
|
||||||
|
@RocketMQMessageListener(topic = "cart-item-add-topic", consumerGroup = "cart-consumer_cart-item-add-topic")
|
||||||
|
public class CardItemAddConsumer implements RocketMQListener<CartItemEvent> {
|
||||||
|
public void onMessage(CartItemEvent addItemEvent) {
|
||||||
|
System.out.println("Adding item: " + addItemEvent);
|
||||||
|
// logic
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
@Service
|
||||||
|
@RocketMQMessageListener(topic = "cart-item-removed-topic", consumerGroup = "cart-consumer_cart-item-removed-topic")
|
||||||
|
public class CardItemRemoveConsumer implements RocketMQListener<CartItemEvent> {
|
||||||
|
public void onMessage(CartItemEvent removeItemEvent) {
|
||||||
|
System.out.println("Removing item: " + removeItemEvent);
|
||||||
|
// logic
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
|
@ -0,0 +1,32 @@
|
||||||
|
package com.baeldung.rocketmq.event;
|
||||||
|
|
||||||
|
public class CartItemEvent {
|
||||||
|
private String itemId;
|
||||||
|
private int quantity;
|
||||||
|
|
||||||
|
public CartItemEvent(String itemId, int quantity) {
|
||||||
|
this.itemId = itemId;
|
||||||
|
this.quantity = quantity;
|
||||||
|
}
|
||||||
|
|
||||||
|
public String getItemId() {
|
||||||
|
return itemId;
|
||||||
|
}
|
||||||
|
|
||||||
|
public void setItemId(String itemId) {
|
||||||
|
this.itemId = itemId;
|
||||||
|
}
|
||||||
|
|
||||||
|
public int getQuantity() {
|
||||||
|
return quantity;
|
||||||
|
}
|
||||||
|
|
||||||
|
public void setQuantity(int quantity) {
|
||||||
|
this.quantity = quantity;
|
||||||
|
}
|
||||||
|
|
||||||
|
@Override
|
||||||
|
public String toString() {
|
||||||
|
return "CartItemEvent{" + "itemId='" + itemId + '\'' + ", quantity=" + quantity + '}';
|
||||||
|
}
|
||||||
|
}
|
|
@ -0,0 +1,26 @@
|
||||||
|
package com.baeldung.rocketmq.producer;
|
||||||
|
|
||||||
|
|
||||||
|
import com.baeldung.rocketmq.event.CartItemEvent;
|
||||||
|
import org.apache.rocketmq.spring.core.RocketMQTemplate;
|
||||||
|
import org.springframework.beans.factory.annotation.Autowired;
|
||||||
|
import org.springframework.boot.CommandLineRunner;
|
||||||
|
import org.springframework.boot.SpringApplication;
|
||||||
|
import org.springframework.boot.autoconfigure.SpringBootApplication;
|
||||||
|
|
||||||
|
@SpringBootApplication
|
||||||
|
public class CartEventProducer implements CommandLineRunner {
|
||||||
|
|
||||||
|
@Autowired
|
||||||
|
private RocketMQTemplate rocketMQTemplate;
|
||||||
|
|
||||||
|
public static void main(String[] args) {
|
||||||
|
SpringApplication.run(CartEventProducer.class, args);
|
||||||
|
}
|
||||||
|
|
||||||
|
public void run(String... args) throws Exception {
|
||||||
|
rocketMQTemplate.convertAndSend("cart-item-add-topic", new CartItemEvent("bike", 1));
|
||||||
|
rocketMQTemplate.convertAndSend("cart-item-add-topic", new CartItemEvent("computer", 2));
|
||||||
|
rocketMQTemplate.convertAndSend("cart-item-removed-topic", new CartItemEvent("bike", 1));
|
||||||
|
}
|
||||||
|
}
|
|
@ -0,0 +1,21 @@
|
||||||
|
package com.baeldung.rocketmq.transaction;
|
||||||
|
|
||||||
|
import org.apache.rocketmq.spring.annotation.RocketMQTransactionListener;
|
||||||
|
import org.apache.rocketmq.spring.core.RocketMQLocalTransactionListener;
|
||||||
|
import org.apache.rocketmq.spring.core.RocketMQLocalTransactionState;
|
||||||
|
import org.springframework.messaging.Message;
|
||||||
|
|
||||||
|
@RocketMQTransactionListener(txProducerGroup = "test-transaction")
|
||||||
|
class TransactionListenerImpl implements RocketMQLocalTransactionListener {
|
||||||
|
@Override
|
||||||
|
public RocketMQLocalTransactionState executeLocalTransaction(Message msg, Object arg) {
|
||||||
|
// ... local transaction process, return ROLLBACK, COMMIT or UNKNOWN
|
||||||
|
return RocketMQLocalTransactionState.UNKNOWN;
|
||||||
|
}
|
||||||
|
|
||||||
|
@Override
|
||||||
|
public RocketMQLocalTransactionState checkLocalTransaction(Message msg) {
|
||||||
|
// ... check transaction status and return ROLLBACK, COMMIT or UNKNOWN
|
||||||
|
return RocketMQLocalTransactionState.COMMIT;
|
||||||
|
}
|
||||||
|
}
|
|
@ -0,0 +1,9 @@
|
||||||
|
rocketmq.name-server=127.0.0.1:9876
|
||||||
|
rocketmq.producer.group=my-group
|
||||||
|
rocketmq.producer.send-message-timeout=300000
|
||||||
|
rocketmq.producer.compress-message-body-threshold=4096
|
||||||
|
rocketmq.producer.max-message-size=4194304
|
||||||
|
rocketmq.producer.retry-times-when-send-async-failed=0
|
||||||
|
rocketmq.producer.retry-next-server=true
|
||||||
|
rocketmq.producer.retry-times-when-send-failed=2
|
||||||
|
|
|
@ -2,10 +2,13 @@ package com.baeldung.metaprogramming.extension
|
||||||
|
|
||||||
import com.baeldung.metaprogramming.Employee
|
import com.baeldung.metaprogramming.Employee
|
||||||
|
|
||||||
|
import java.time.LocalDate
|
||||||
|
import java.time.Year
|
||||||
|
|
||||||
class BasicExtensions {
|
class BasicExtensions {
|
||||||
|
|
||||||
static int getYearOfBirth(Employee self) {
|
static int getYearOfBirth(Employee self) {
|
||||||
return (new Date().getYear() + 1900) - self.age;
|
return Year.now().value - self.age
|
||||||
}
|
}
|
||||||
|
|
||||||
static String capitalize(String self) {
|
static String capitalize(String self) {
|
||||||
|
|
|
@ -1,6 +1,9 @@
|
||||||
package com.baeldung.metaprogramming
|
package com.baeldung.metaprogramming
|
||||||
|
|
||||||
import groovy.time.TimeCategory
|
|
||||||
|
import java.time.LocalDate
|
||||||
|
import java.time.Period
|
||||||
|
import java.time.Year
|
||||||
|
|
||||||
class MetaprogrammingUnitTest extends GroovyTestCase {
|
class MetaprogrammingUnitTest extends GroovyTestCase {
|
||||||
|
|
||||||
|
@ -51,15 +54,17 @@ class MetaprogrammingUnitTest extends GroovyTestCase {
|
||||||
|
|
||||||
void testJavaMetaClass() {
|
void testJavaMetaClass() {
|
||||||
String.metaClass.capitalize = { String str ->
|
String.metaClass.capitalize = { String str ->
|
||||||
str.substring(0, 1).toUpperCase() + str.substring(1);
|
str.substring(0, 1).toUpperCase() + str.substring(1)
|
||||||
}
|
}
|
||||||
assert "norman".capitalize() == "Norman"
|
assert "norman".capitalize() == "Norman"
|
||||||
}
|
}
|
||||||
|
|
||||||
// void testEmployeeExtension() {
|
void testEmployeeExtension() {
|
||||||
// Employee emp = new Employee(age: 28)
|
def age = 28
|
||||||
// assert emp.getYearOfBirth() == 1991
|
def expectedYearOfBirth = Year.now() - age
|
||||||
// }
|
Employee emp = new Employee(age: age)
|
||||||
|
assert emp.getYearOfBirth() == expectedYearOfBirth.value
|
||||||
|
}
|
||||||
|
|
||||||
void testJavaClassesExtensions() {
|
void testJavaClassesExtensions() {
|
||||||
5.printCounter()
|
5.printCounter()
|
||||||
|
|
|
@ -75,6 +75,7 @@ class WebserviceManualTest extends GroovyTestCase {
|
||||||
assert stories.size() == 5
|
assert stories.size() == 5
|
||||||
}
|
}
|
||||||
|
|
||||||
|
/* see BAEL-3753
|
||||||
void test_whenConsumingSoap_thenReceiveResponse() {
|
void test_whenConsumingSoap_thenReceiveResponse() {
|
||||||
def url = "http://www.dataaccess.com/webservicesserver/numberconversion.wso"
|
def url = "http://www.dataaccess.com/webservicesserver/numberconversion.wso"
|
||||||
def soapClient = new SOAPClient(url)
|
def soapClient = new SOAPClient(url)
|
||||||
|
@ -89,6 +90,7 @@ class WebserviceManualTest extends GroovyTestCase {
|
||||||
def words = response.NumberToWordsResponse
|
def words = response.NumberToWordsResponse
|
||||||
assert words == "one thousand two hundred and thirty four "
|
assert words == "one thousand two hundred and thirty four "
|
||||||
}
|
}
|
||||||
|
*/
|
||||||
|
|
||||||
void test_whenConsumingRestGet_thenReceiveResponse() {
|
void test_whenConsumingRestGet_thenReceiveResponse() {
|
||||||
def path = "/get"
|
def path = "/get"
|
||||||
|
|
|
@ -1,2 +0,0 @@
|
||||||
### Relevant Articles:
|
|
||||||
- [Java 9 java.lang.Module API](https://www.baeldung.com/java-lambda-effectively-final-local-variables)
|
|
|
@ -0,0 +1,52 @@
|
||||||
|
<?xml version="1.0" encoding="UTF-8"?>
|
||||||
|
<project xmlns="http://maven.apache.org/POM/4.0.0"
|
||||||
|
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
|
||||||
|
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
|
||||||
|
<modelVersion>4.0.0</modelVersion>
|
||||||
|
<groupId>com.baeldung</groupId>
|
||||||
|
<artifactId>core-java-14</artifactId>
|
||||||
|
<version>1.0.0-SNAPSHOT</version>
|
||||||
|
<name>core-java-14</name>
|
||||||
|
<packaging>jar</packaging>
|
||||||
|
<url>http://maven.apache.org</url>
|
||||||
|
|
||||||
|
<parent>
|
||||||
|
<groupId>com.baeldung</groupId>
|
||||||
|
<artifactId>parent-modules</artifactId>
|
||||||
|
<version>1.0.0-SNAPSHOT</version>
|
||||||
|
<relativePath>../../</relativePath>
|
||||||
|
</parent>
|
||||||
|
|
||||||
|
<build>
|
||||||
|
<plugins>
|
||||||
|
<plugin>
|
||||||
|
<groupId>org.apache.maven.plugins</groupId>
|
||||||
|
<artifactId>maven-compiler-plugin</artifactId>
|
||||||
|
<version>${maven-compiler-plugin.version}</version>
|
||||||
|
<configuration>
|
||||||
|
<source>${maven.compiler.source.version}</source>
|
||||||
|
<target>${maven.compiler.target.version}</target>
|
||||||
|
<compilerArgs>
|
||||||
|
<compilerArg>
|
||||||
|
--enable-preview
|
||||||
|
</compilerArg>
|
||||||
|
</compilerArgs>
|
||||||
|
</configuration>
|
||||||
|
</plugin>
|
||||||
|
<plugin>
|
||||||
|
<groupId>org.apache.maven.plugins</groupId>
|
||||||
|
<artifactId>maven-surefire-plugin</artifactId>
|
||||||
|
<version>3.0.0-M3</version>
|
||||||
|
<configuration>
|
||||||
|
<argLine>--enable-preview</argLine>
|
||||||
|
</configuration>
|
||||||
|
</plugin>
|
||||||
|
</plugins>
|
||||||
|
</build>
|
||||||
|
|
||||||
|
<properties>
|
||||||
|
<maven.compiler.source.version>14</maven.compiler.source.version>
|
||||||
|
<maven.compiler.target.version>14</maven.compiler.target.version>
|
||||||
|
</properties>
|
||||||
|
|
||||||
|
</project>
|
|
@ -0,0 +1,50 @@
|
||||||
|
package com.baeldung.serial;
|
||||||
|
|
||||||
|
import java.io.IOException;
|
||||||
|
import java.io.ObjectInputStream;
|
||||||
|
import java.io.ObjectOutputStream;
|
||||||
|
import java.io.ObjectStreamException;
|
||||||
|
import java.io.ObjectStreamField;
|
||||||
|
import java.io.Serial;
|
||||||
|
import java.io.Serializable;
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Class showcasing the usage of the Java 14 @Serial annotation.
|
||||||
|
*
|
||||||
|
* @author Donato Rimenti
|
||||||
|
*/
|
||||||
|
public class MySerialClass implements Serializable {
|
||||||
|
|
||||||
|
@Serial
|
||||||
|
private static final ObjectStreamField[] serialPersistentFields = null;
|
||||||
|
|
||||||
|
@Serial
|
||||||
|
private static final long serialVersionUID = 1;
|
||||||
|
|
||||||
|
@Serial
|
||||||
|
private void writeObject(ObjectOutputStream stream) throws IOException {
|
||||||
|
// ...
|
||||||
|
}
|
||||||
|
|
||||||
|
@Serial
|
||||||
|
private void readObject(ObjectInputStream stream) throws IOException, ClassNotFoundException {
|
||||||
|
// ...
|
||||||
|
}
|
||||||
|
|
||||||
|
@Serial
|
||||||
|
private void readObjectNoData() throws ObjectStreamException {
|
||||||
|
// ...
|
||||||
|
}
|
||||||
|
|
||||||
|
@Serial
|
||||||
|
private Object writeReplace() throws ObjectStreamException {
|
||||||
|
// ...
|
||||||
|
return null;
|
||||||
|
}
|
||||||
|
|
||||||
|
@Serial
|
||||||
|
private Object readResolve() throws ObjectStreamException {
|
||||||
|
// ...
|
||||||
|
return null;
|
||||||
|
}
|
||||||
|
}
|
|
@ -19,6 +19,16 @@
|
||||||
<groupId>org.apache.commons</groupId>
|
<groupId>org.apache.commons</groupId>
|
||||||
<artifactId>commons-lang3</artifactId>
|
<artifactId>commons-lang3</artifactId>
|
||||||
<version>${commons-lang3.version}</version>
|
<version>${commons-lang3.version}</version>
|
||||||
|
</dependency>
|
||||||
|
<dependency>
|
||||||
|
<groupId>org.openjdk.jmh</groupId>
|
||||||
|
<artifactId>jmh-core</artifactId>
|
||||||
|
<version>${jmh.version}</version>
|
||||||
|
</dependency>
|
||||||
|
<dependency>
|
||||||
|
<groupId>org.openjdk.jmh</groupId>
|
||||||
|
<artifactId>jmh-generator-annprocess</artifactId>
|
||||||
|
<version>${jmh.version}</version>
|
||||||
</dependency>
|
</dependency>
|
||||||
<!-- test scoped -->
|
<!-- test scoped -->
|
||||||
<dependency>
|
<dependency>
|
||||||
|
@ -37,9 +47,34 @@
|
||||||
<filtering>true</filtering>
|
<filtering>true</filtering>
|
||||||
</resource>
|
</resource>
|
||||||
</resources>
|
</resources>
|
||||||
|
<plugins>
|
||||||
|
<plugin>
|
||||||
|
<groupId>org.apache.maven.plugins</groupId>
|
||||||
|
<artifactId>maven-shade-plugin</artifactId>
|
||||||
|
<version>3.2.0</version>
|
||||||
|
<executions>
|
||||||
|
<execution>
|
||||||
|
<phase>package</phase>
|
||||||
|
<goals>
|
||||||
|
<goal>shade</goal>
|
||||||
|
</goals>
|
||||||
|
<configuration>
|
||||||
|
<finalName>benchmarks</finalName>
|
||||||
|
<transformers>
|
||||||
|
<transformer
|
||||||
|
implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
|
||||||
|
<mainClass>org.openjdk.jmh.Main</mainClass>
|
||||||
|
</transformer>
|
||||||
|
</transformers>
|
||||||
|
</configuration>
|
||||||
|
</execution>
|
||||||
|
</executions>
|
||||||
|
</plugin>
|
||||||
|
</plugins>
|
||||||
</build>
|
</build>
|
||||||
|
|
||||||
<properties>
|
<properties>
|
||||||
|
<jmh.version>1.19</jmh.version>
|
||||||
<!-- util -->
|
<!-- util -->
|
||||||
<commons-lang3.version>3.9</commons-lang3.version>
|
<commons-lang3.version>3.9</commons-lang3.version>
|
||||||
<!-- testing -->
|
<!-- testing -->
|
||||||
|
|
|
@ -0,0 +1,72 @@
|
||||||
|
package com.baeldung.arraysort;
|
||||||
|
|
||||||
|
import java.util.Arrays;
|
||||||
|
import java.util.Random;
|
||||||
|
import java.util.concurrent.TimeUnit;
|
||||||
|
|
||||||
|
import org.openjdk.jmh.annotations.Benchmark;
|
||||||
|
import org.openjdk.jmh.annotations.BenchmarkMode;
|
||||||
|
import org.openjdk.jmh.annotations.Fork;
|
||||||
|
import org.openjdk.jmh.annotations.Level;
|
||||||
|
import org.openjdk.jmh.annotations.Measurement;
|
||||||
|
import org.openjdk.jmh.annotations.Mode;
|
||||||
|
import org.openjdk.jmh.annotations.OutputTimeUnit;
|
||||||
|
import org.openjdk.jmh.annotations.Param;
|
||||||
|
import org.openjdk.jmh.annotations.Scope;
|
||||||
|
import org.openjdk.jmh.annotations.Setup;
|
||||||
|
import org.openjdk.jmh.annotations.State;
|
||||||
|
import org.openjdk.jmh.annotations.Warmup;
|
||||||
|
import org.openjdk.jmh.infra.Blackhole;
|
||||||
|
|
||||||
|
@BenchmarkMode(Mode.AverageTime)
|
||||||
|
@Warmup(iterations = 5)
|
||||||
|
@Measurement(iterations = 10)
|
||||||
|
@Fork(2)
|
||||||
|
@OutputTimeUnit(TimeUnit.MILLISECONDS)
|
||||||
|
public class ArraySortingBenchmark {
|
||||||
|
|
||||||
|
@State(Scope.Benchmark)
|
||||||
|
public static class ArrayContainer {
|
||||||
|
|
||||||
|
@Param({ "1000", "10000", "100000", "1000000" })
|
||||||
|
int arraySize;
|
||||||
|
|
||||||
|
// initial unsorted array
|
||||||
|
int[] unsortedArray;
|
||||||
|
|
||||||
|
//cloned array to sort
|
||||||
|
int[] arrayToSort;
|
||||||
|
|
||||||
|
@Setup(Level.Trial)
|
||||||
|
public void createUnSortedArray() {
|
||||||
|
unsortedArray = new int[arraySize];
|
||||||
|
for (int i = 0; i < arraySize; i++) {
|
||||||
|
unsortedArray[i] = new Random().nextInt(1000);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
@Setup(Level.Invocation)
|
||||||
|
public void createUnSortedArrayCopy() {
|
||||||
|
arrayToSort = unsortedArray.clone();
|
||||||
|
}
|
||||||
|
|
||||||
|
int[] getArrayToSort() {
|
||||||
|
return arrayToSort;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
@Benchmark
|
||||||
|
public void benchmark_arrays_parallel_sort(ArrayContainer d, Blackhole b) {
|
||||||
|
int[] arr = d.getArrayToSort();
|
||||||
|
Arrays.parallelSort(arr);
|
||||||
|
b.consume(arr);
|
||||||
|
}
|
||||||
|
|
||||||
|
@Benchmark
|
||||||
|
public void benchmark_arrays_sort(ArrayContainer d, Blackhole b) {
|
||||||
|
int[] arr = d.getArrayToSort();
|
||||||
|
Arrays.sort(arr);
|
||||||
|
b.consume(arr);
|
||||||
|
}
|
||||||
|
|
||||||
|
}
|
|
@ -24,11 +24,21 @@ public class DuplicatesCounter {
|
||||||
return resultMap;
|
return resultMap;
|
||||||
}
|
}
|
||||||
|
|
||||||
public static <T> Map<T, Long> countByClassicalLoopWithMapCompute(List<T> inputList) {
|
public static <T> Map<T, Long> countByForEachLoopWithGetOrDefault(List<T> inputList) {
|
||||||
Map<T, Long> resultMap = new HashMap<>();
|
Map<T, Long> resultMap = new HashMap<>();
|
||||||
for (T element : inputList) {
|
inputList.forEach(e -> resultMap.put(e, resultMap.getOrDefault(e, 0L) + 1L));
|
||||||
resultMap.compute(element, (k, v) -> v == null ? 1 : v + 1);
|
return resultMap;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
public static <T> Map<T, Long> countByForEachLoopWithMapCompute(List<T> inputList) {
|
||||||
|
Map<T, Long> resultMap = new HashMap<>();
|
||||||
|
inputList.forEach(e -> resultMap.compute(e, (k, v) -> v == null ? 1L : v + 1L));
|
||||||
|
return resultMap;
|
||||||
|
}
|
||||||
|
|
||||||
|
public static <T> Map<T, Long> countByForEachLoopWithMapMerge(List<T> inputList) {
|
||||||
|
Map<T, Long> resultMap = new HashMap<>();
|
||||||
|
inputList.forEach(e -> resultMap.merge(e, 1L, Long::sum));
|
||||||
return resultMap;
|
return resultMap;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
|
|
@ -11,7 +11,6 @@ import static org.assertj.core.data.MapEntry.entry;
|
||||||
|
|
||||||
class DuplicatesCounterUnitTest {
|
class DuplicatesCounterUnitTest {
|
||||||
|
|
||||||
|
|
||||||
private static List<String> INPUT_LIST = Lists.list(
|
private static List<String> INPUT_LIST = Lists.list(
|
||||||
"expect1",
|
"expect1",
|
||||||
"expect2", "expect2",
|
"expect2", "expect2",
|
||||||
|
@ -24,10 +23,21 @@ class DuplicatesCounterUnitTest {
|
||||||
verifyResult(result);
|
verifyResult(result);
|
||||||
}
|
}
|
||||||
|
|
||||||
|
@Test
|
||||||
|
void givenInput_whenCountByForEachLoopWithGetOrDefault_thenGetResultMap() {
|
||||||
|
Map<String, Long> result = DuplicatesCounter.countByForEachLoopWithGetOrDefault(INPUT_LIST);
|
||||||
|
verifyResult(result);
|
||||||
|
}
|
||||||
|
|
||||||
@Test
|
@Test
|
||||||
void givenInput_whenCountByClassicalLoopWithMapCompute_thenGetResultMap() {
|
void givenInput_whenCountByForEachLoopWithMapCompute_thenGetResultMap() {
|
||||||
Map<String, Long> result = DuplicatesCounter.countByClassicalLoopWithMapCompute(INPUT_LIST);
|
Map<String, Long> result = DuplicatesCounter.countByForEachLoopWithMapCompute(INPUT_LIST);
|
||||||
|
verifyResult(result);
|
||||||
|
}
|
||||||
|
|
||||||
|
@Test
|
||||||
|
void givenInput_whenCountByForEachLoopWithMapMerge_thenGetResultMap() {
|
||||||
|
Map<String, Long> result = DuplicatesCounter.countByForEachLoopWithMapMerge(INPUT_LIST);
|
||||||
verifyResult(result);
|
verifyResult(result);
|
||||||
}
|
}
|
||||||
|
|
||||||
|
|
|
@ -23,6 +23,37 @@
|
||||||
<version>${assertj.version}</version>
|
<version>${assertj.version}</version>
|
||||||
<scope>test</scope>
|
<scope>test</scope>
|
||||||
</dependency>
|
</dependency>
|
||||||
|
|
||||||
|
<dependency>
|
||||||
|
<groupId>com.jcabi</groupId>
|
||||||
|
<artifactId>jcabi-aspects</artifactId>
|
||||||
|
<version>${jcabi-aspects.version}</version>
|
||||||
|
</dependency>
|
||||||
|
|
||||||
|
<dependency>
|
||||||
|
<groupId>org.aspectj</groupId>
|
||||||
|
<artifactId>aspectjrt</artifactId>
|
||||||
|
<version>${aspectjrt.version}</version>
|
||||||
|
<scope>runtime</scope>
|
||||||
|
</dependency>
|
||||||
|
|
||||||
|
<dependency>
|
||||||
|
<groupId>com.google.guava</groupId>
|
||||||
|
<artifactId>guava</artifactId>
|
||||||
|
<version>${guava.version}</version>
|
||||||
|
</dependency>
|
||||||
|
|
||||||
|
<dependency>
|
||||||
|
<groupId>org.cactoos</groupId>
|
||||||
|
<artifactId>cactoos</artifactId>
|
||||||
|
<version>${cactoos.version}</version>
|
||||||
|
</dependency>
|
||||||
|
|
||||||
|
<dependency>
|
||||||
|
<groupId>com.ea.async</groupId>
|
||||||
|
<artifactId>ea-async</artifactId>
|
||||||
|
<version>${ea-async.version}</version>
|
||||||
|
</dependency>
|
||||||
</dependencies>
|
</dependencies>
|
||||||
|
|
||||||
<build>
|
<build>
|
||||||
|
@ -36,6 +67,30 @@
|
||||||
<target>${maven.compiler.target}</target>
|
<target>${maven.compiler.target}</target>
|
||||||
</configuration>
|
</configuration>
|
||||||
</plugin>
|
</plugin>
|
||||||
|
<plugin>
|
||||||
|
<groupId>com.jcabi</groupId>
|
||||||
|
<artifactId>jcabi-maven-plugin</artifactId>
|
||||||
|
<version>${jcabi-maven-plugin.version}</version>
|
||||||
|
<executions>
|
||||||
|
<execution>
|
||||||
|
<goals>
|
||||||
|
<goal>ajc</goal>
|
||||||
|
</goals>
|
||||||
|
</execution>
|
||||||
|
</executions>
|
||||||
|
<dependencies>
|
||||||
|
<dependency>
|
||||||
|
<groupId>org.aspectj</groupId>
|
||||||
|
<artifactId>aspectjtools</artifactId>
|
||||||
|
<version>${aspectjtools.version}</version>
|
||||||
|
</dependency>
|
||||||
|
<dependency>
|
||||||
|
<groupId>org.aspectj</groupId>
|
||||||
|
<artifactId>aspectjweaver</artifactId>
|
||||||
|
<version>${aspectjweaver.version}</version>
|
||||||
|
</dependency>
|
||||||
|
</dependencies>
|
||||||
|
</plugin>
|
||||||
</plugins>
|
</plugins>
|
||||||
<resources>
|
<resources>
|
||||||
<resource>
|
<resource>
|
||||||
|
@ -49,6 +104,14 @@
|
||||||
<assertj.version>3.14.0</assertj.version>
|
<assertj.version>3.14.0</assertj.version>
|
||||||
<maven.compiler.source>1.8</maven.compiler.source>
|
<maven.compiler.source>1.8</maven.compiler.source>
|
||||||
<maven.compiler.target>1.8</maven.compiler.target>
|
<maven.compiler.target>1.8</maven.compiler.target>
|
||||||
|
<jcabi-aspects.version>0.22.6</jcabi-aspects.version>
|
||||||
|
<aspectjrt.version>1.9.5</aspectjrt.version>
|
||||||
|
<guava.version>28.2-jre</guava.version>
|
||||||
|
<cactoos.version>0.43</cactoos.version>
|
||||||
|
<ea-async.version>1.2.3</ea-async.version>
|
||||||
|
<jcabi-maven-plugin.version>0.14.1</jcabi-maven-plugin.version>
|
||||||
|
<aspectjtools.version>1.9.1</aspectjtools.version>
|
||||||
|
<aspectjweaver.version>1.9.1</aspectjweaver.version>
|
||||||
</properties>
|
</properties>
|
||||||
|
|
||||||
</project>
|
</project>
|
||||||
|
|
|
@ -0,0 +1,57 @@
|
||||||
|
package com.baeldung.async;
|
||||||
|
|
||||||
|
import static com.ea.async.Async.await;
|
||||||
|
import java.util.concurrent.CompletableFuture;
|
||||||
|
import java.util.concurrent.ExecutionException;
|
||||||
|
|
||||||
|
import com.ea.async.Async;
|
||||||
|
|
||||||
|
public class EAAsyncExample {
|
||||||
|
|
||||||
|
static {
|
||||||
|
Async.init();
|
||||||
|
}
|
||||||
|
|
||||||
|
public static void main(String[] args) throws Exception {
|
||||||
|
usingCompletableFuture();
|
||||||
|
usingAsyncAwait();
|
||||||
|
}
|
||||||
|
|
||||||
|
public static void usingCompletableFuture() throws InterruptedException, ExecutionException, Exception {
|
||||||
|
CompletableFuture<Void> completableFuture = hello()
|
||||||
|
.thenComposeAsync(hello -> mergeWorld(hello))
|
||||||
|
.thenAcceptAsync(helloWorld -> print(helloWorld))
|
||||||
|
.exceptionally( throwable -> {
|
||||||
|
System.out.println(throwable.getCause());
|
||||||
|
return null;
|
||||||
|
});
|
||||||
|
completableFuture.get();
|
||||||
|
}
|
||||||
|
|
||||||
|
public static CompletableFuture<String> hello() {
|
||||||
|
CompletableFuture<String> completableFuture = CompletableFuture.supplyAsync(() -> "Hello");
|
||||||
|
return completableFuture;
|
||||||
|
}
|
||||||
|
|
||||||
|
public static CompletableFuture<String> mergeWorld(String s) {
|
||||||
|
CompletableFuture<String> completableFuture = CompletableFuture.supplyAsync(() -> {
|
||||||
|
return s + " World!";
|
||||||
|
});
|
||||||
|
return completableFuture;
|
||||||
|
}
|
||||||
|
|
||||||
|
public static void print(String str) {
|
||||||
|
CompletableFuture.runAsync(() -> System.out.println(str));
|
||||||
|
}
|
||||||
|
|
||||||
|
private static void usingAsyncAwait() {
|
||||||
|
try {
|
||||||
|
String hello = await(hello());
|
||||||
|
String helloWorld = await(mergeWorld(hello));
|
||||||
|
await(CompletableFuture.runAsync(() -> print(helloWorld)));
|
||||||
|
} catch (Exception e) {
|
||||||
|
e.printStackTrace();
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
}
|
|
@ -0,0 +1,183 @@
|
||||||
|
package com.baeldung.async;
|
||||||
|
|
||||||
|
import static com.ea.async.Async.await;
|
||||||
|
|
||||||
|
import java.util.concurrent.Callable;
|
||||||
|
import java.util.concurrent.CompletableFuture;
|
||||||
|
import java.util.concurrent.ExecutionException;
|
||||||
|
import java.util.concurrent.ExecutorService;
|
||||||
|
import java.util.concurrent.Executors;
|
||||||
|
import java.util.concurrent.Future;
|
||||||
|
|
||||||
|
import com.google.common.util.concurrent.AsyncCallable;
|
||||||
|
import com.google.common.util.concurrent.Callables;
|
||||||
|
import com.google.common.util.concurrent.Futures;
|
||||||
|
import com.google.common.util.concurrent.ListenableFuture;
|
||||||
|
import com.google.common.util.concurrent.ListeningExecutorService;
|
||||||
|
import com.google.common.util.concurrent.MoreExecutors;
|
||||||
|
import com.jcabi.aspects.Async;
|
||||||
|
import com.jcabi.aspects.Loggable;
|
||||||
|
|
||||||
|
public class JavaAsync {
|
||||||
|
|
||||||
|
static {
|
||||||
|
com.ea.async.Async.init();
|
||||||
|
}
|
||||||
|
|
||||||
|
private static final ExecutorService threadpool = Executors.newCachedThreadPool();
|
||||||
|
|
||||||
|
public static void main (String[] args) throws InterruptedException, ExecutionException {
|
||||||
|
int number = 20;
|
||||||
|
|
||||||
|
//Thread Example
|
||||||
|
factorialUsingThread(number).start();
|
||||||
|
|
||||||
|
//FutureTask Example
|
||||||
|
Future<Long> futureTask = factorialUsingFutureTask(number);
|
||||||
|
System.out.println("Factorial of " + number + " is: " + futureTask.get());
|
||||||
|
|
||||||
|
// CompletableFuture Example
|
||||||
|
Future<Long> completableFuture = factorialUsingCompletableFuture(number);
|
||||||
|
System.out.println("Factorial of " + number + " is: " + completableFuture.get());
|
||||||
|
|
||||||
|
// EA Async example
|
||||||
|
System.out.println("Factorial of " + number + " is: " + factorialUsingEAAsync(number));
|
||||||
|
|
||||||
|
// cactoos async example
|
||||||
|
Future<Long> asyncFuture = factorialUsingCactoos(number);
|
||||||
|
System.out.println("Factorial of " + number + " is: " + asyncFuture.get());
|
||||||
|
|
||||||
|
// Guava example
|
||||||
|
ListenableFuture<Long> guavaFuture = factorialUsingGuavaServiceSubmit(number);
|
||||||
|
System.out.println("Factorial of " + number + " is: " + guavaFuture.get());
|
||||||
|
|
||||||
|
ListenableFuture<Long> guavaFutures = factorialUsingGuavaFutures(number);
|
||||||
|
System.out.println("Factorial of " + number + " is: " + guavaFutures.get());
|
||||||
|
|
||||||
|
// @async jcabi-aspect example
|
||||||
|
Future<Long> aspectFuture = factorialUsingJcabiAspect(number);
|
||||||
|
System.out.println("Factorial of " + number + " is: " + aspectFuture.get());
|
||||||
|
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Finds factorial of a number
|
||||||
|
* @param number
|
||||||
|
* @return
|
||||||
|
*/
|
||||||
|
public static long factorial(int number) {
|
||||||
|
long result = 1;
|
||||||
|
for(int i=number;i>0;i--) {
|
||||||
|
result *= i;
|
||||||
|
}
|
||||||
|
return result;
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Finds factorial of a number using Thread
|
||||||
|
* @param number
|
||||||
|
* @return
|
||||||
|
*/
|
||||||
|
@Loggable
|
||||||
|
public static Thread factorialUsingThread(int number) {
|
||||||
|
Thread newThread = new Thread(() -> {
|
||||||
|
System.out.println("Factorial of " + number + " is: " + factorial(number));
|
||||||
|
});
|
||||||
|
|
||||||
|
return newThread;
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Finds factorial of a number using FutureTask
|
||||||
|
* @param number
|
||||||
|
* @return
|
||||||
|
*/
|
||||||
|
@Loggable
|
||||||
|
public static Future<Long> factorialUsingFutureTask(int number) {
|
||||||
|
Future<Long> futureTask = threadpool.submit(() -> factorial(number));
|
||||||
|
|
||||||
|
while (!futureTask.isDone()) {
|
||||||
|
System.out.println("FutureTask is not finished yet...");
|
||||||
|
}
|
||||||
|
|
||||||
|
return futureTask;
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Finds factorial of a number using CompletableFuture
|
||||||
|
* @param number
|
||||||
|
* @return
|
||||||
|
*/
|
||||||
|
@Loggable
|
||||||
|
public static Future<Long> factorialUsingCompletableFuture(int number) {
|
||||||
|
CompletableFuture<Long> completableFuture = CompletableFuture.supplyAsync(() -> factorial(number));
|
||||||
|
return completableFuture;
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Finds factorial of a number using EA Async
|
||||||
|
* @param number
|
||||||
|
* @return
|
||||||
|
*/
|
||||||
|
@Loggable
|
||||||
|
public static long factorialUsingEAAsync(int number) {
|
||||||
|
CompletableFuture<Long> completableFuture = CompletableFuture.supplyAsync(() -> factorial(number));
|
||||||
|
long result = await(completableFuture);
|
||||||
|
return result;
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Finds factorial of a number using Async of Cactoos
|
||||||
|
* @param number
|
||||||
|
* @return
|
||||||
|
* @throws InterruptedException
|
||||||
|
* @throws ExecutionException
|
||||||
|
*/
|
||||||
|
@Loggable
|
||||||
|
public static Future<Long> factorialUsingCactoos(int number) throws InterruptedException, ExecutionException {
|
||||||
|
org.cactoos.func.Async<Integer, Long> asyncFunction = new org.cactoos.func.Async<Integer, Long>(input -> factorial(input));
|
||||||
|
Future<Long> asyncFuture = asyncFunction.apply(number);
|
||||||
|
return asyncFuture;
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Finds factorial of a number using Guava's ListeningExecutorService.submit()
|
||||||
|
* @param number
|
||||||
|
* @return
|
||||||
|
*/
|
||||||
|
@Loggable
|
||||||
|
public static ListenableFuture<Long> factorialUsingGuavaServiceSubmit(int number) {
|
||||||
|
ListeningExecutorService service = MoreExecutors.listeningDecorator(threadpool);
|
||||||
|
ListenableFuture<Long> factorialFuture = (ListenableFuture<Long>) service.submit(()-> factorial(number));
|
||||||
|
return factorialFuture;
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Finds factorial of a number using Guava's Futures.submitAsync()
|
||||||
|
* @param number
|
||||||
|
* @return
|
||||||
|
*/
|
||||||
|
@Loggable
|
||||||
|
public static ListenableFuture<Long> factorialUsingGuavaFutures(int number) {
|
||||||
|
ListeningExecutorService service = MoreExecutors.listeningDecorator(threadpool);
|
||||||
|
AsyncCallable<Long> asyncCallable = Callables.asAsyncCallable(new Callable<Long>() {
|
||||||
|
public Long call() {
|
||||||
|
return factorial(number);
|
||||||
|
}
|
||||||
|
}, service);
|
||||||
|
return Futures.submitAsync(asyncCallable, service);
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Finds factorial of a number using @Async of jcabi-aspects
|
||||||
|
* @param number
|
||||||
|
* @return
|
||||||
|
*/
|
||||||
|
@Async
|
||||||
|
@Loggable
|
||||||
|
public static Future<Long> factorialUsingJcabiAspect(int number) {
|
||||||
|
Future<Long> factorialFuture = CompletableFuture.supplyAsync(() -> factorial(number));
|
||||||
|
return factorialFuture;
|
||||||
|
}
|
||||||
|
|
||||||
|
}
|
|
@ -1,6 +1,5 @@
|
||||||
## Java Date/time computations Cookbooks and Examples
|
## Core Date Operations (Part 1)
|
||||||
|
This module contains articles about date operations in Java.
|
||||||
This module contains articles about date and time computations in Java.
|
|
||||||
|
|
||||||
### Relevant Articles:
|
### Relevant Articles:
|
||||||
- [Difference Between Two Dates in Java](http://www.baeldung.com/java-date-difference)
|
- [Difference Between Two Dates in Java](http://www.baeldung.com/java-date-difference)
|
||||||
|
@ -13,3 +12,4 @@ This module contains articles about date and time computations in Java.
|
||||||
- [Increment Date in Java](http://www.baeldung.com/java-increment-date)
|
- [Increment Date in Java](http://www.baeldung.com/java-increment-date)
|
||||||
- [Add Hours To a Date In Java](http://www.baeldung.com/java-add-hours-date)
|
- [Add Hours To a Date In Java](http://www.baeldung.com/java-add-hours-date)
|
||||||
- [Introduction to Joda-Time](http://www.baeldung.com/joda-time)
|
- [Introduction to Joda-Time](http://www.baeldung.com/joda-time)
|
||||||
|
- [[Next -->]](/core-java-modules/core-java-date-operations-2)
|
|
@ -2,9 +2,9 @@
|
||||||
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
|
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
|
||||||
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
|
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
|
||||||
<modelVersion>4.0.0</modelVersion>
|
<modelVersion>4.0.0</modelVersion>
|
||||||
<artifactId>core-java-datetime-computations</artifactId>
|
<artifactId>core-java-date-operations-1</artifactId>
|
||||||
<version>${project.parent.version}</version>
|
<version>${project.parent.version}</version>
|
||||||
<name>core-java-datetime-computations</name>
|
<name>core-java-date-operations-1</name>
|
||||||
<packaging>jar</packaging>
|
<packaging>jar</packaging>
|
||||||
|
|
||||||
<parent>
|
<parent>
|
||||||
|
@ -41,7 +41,7 @@
|
||||||
</dependencies>
|
</dependencies>
|
||||||
|
|
||||||
<build>
|
<build>
|
||||||
<finalName>core-java-datetime-computations</finalName>
|
<finalName>core-java-date-operations-1</finalName>
|
||||||
<resources>
|
<resources>
|
||||||
<resource>
|
<resource>
|
||||||
<directory>src/main/resources</directory>
|
<directory>src/main/resources</directory>
|
|
@ -1,4 +1,4 @@
|
||||||
## Core Date Operations
|
## Core Date Operations (Part 2)
|
||||||
This module contains articles about date operations in Java.
|
This module contains articles about date operations in Java.
|
||||||
|
|
||||||
### Relevant Articles:
|
### Relevant Articles:
|
||||||
|
@ -6,3 +6,4 @@ This module contains articles about date operations in Java.
|
||||||
- [Skipping Weekends While Adding Days to LocalDate in Java 8](https://www.baeldung.com/java-localdate-add-days-skip-weekends)
|
- [Skipping Weekends While Adding Days to LocalDate in Java 8](https://www.baeldung.com/java-localdate-add-days-skip-weekends)
|
||||||
- [Checking If Two Java Dates Are on the Same Day](https://www.baeldung.com/java-check-two-dates-on-same-day)
|
- [Checking If Two Java Dates Are on the Same Day](https://www.baeldung.com/java-check-two-dates-on-same-day)
|
||||||
- [Converting Java Date to OffsetDateTime](https://www.baeldung.com/java-convert-date-to-offsetdatetime)
|
- [Converting Java Date to OffsetDateTime](https://www.baeldung.com/java-convert-date-to-offsetdatetime)
|
||||||
|
- [[<-- Prev]](/core-java-modules/core-java-date-operations-1)
|
|
@ -3,9 +3,9 @@
|
||||||
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
|
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
|
||||||
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
|
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
|
||||||
<modelVersion>4.0.0</modelVersion>
|
<modelVersion>4.0.0</modelVersion>
|
||||||
<artifactId>core-java-date-operations</artifactId>
|
<artifactId>core-java-date-operations-2</artifactId>
|
||||||
<version>${project.parent.version}</version>
|
<version>${project.parent.version}</version>
|
||||||
<name>core-java-date-operations</name>
|
<name>core-java-date-operations-2</name>
|
||||||
<packaging>jar</packaging>
|
<packaging>jar</packaging>
|
||||||
|
|
||||||
<parent>
|
<parent>
|
||||||
|
@ -31,11 +31,18 @@
|
||||||
<artifactId>hirondelle-date4j</artifactId>
|
<artifactId>hirondelle-date4j</artifactId>
|
||||||
<version>${hirondelle-date4j.version}</version>
|
<version>${hirondelle-date4j.version}</version>
|
||||||
</dependency>
|
</dependency>
|
||||||
|
<dependency>
|
||||||
|
<groupId>org.assertj</groupId>
|
||||||
|
<artifactId>assertj-core</artifactId>
|
||||||
|
<version>${assertj.version}</version>
|
||||||
|
<scope>test</scope>
|
||||||
|
</dependency>
|
||||||
</dependencies>
|
</dependencies>
|
||||||
|
|
||||||
<properties>
|
<properties>
|
||||||
<joda-time.version>2.10</joda-time.version>
|
<joda-time.version>2.10</joda-time.version>
|
||||||
<hirondelle-date4j.version>1.5.1</hirondelle-date4j.version>
|
<hirondelle-date4j.version>1.5.1</hirondelle-date4j.version>
|
||||||
|
<assertj.version>3.14.0</assertj.version>
|
||||||
</properties>
|
</properties>
|
||||||
|
|
||||||
</project>
|
</project>
|
|
@ -1,8 +1,10 @@
|
||||||
package com.baeldung.date.comparison;
|
package com.baeldung.date.comparison;
|
||||||
|
|
||||||
import java.text.SimpleDateFormat;
|
import java.text.SimpleDateFormat;
|
||||||
|
import java.time.Instant;
|
||||||
import java.time.LocalDate;
|
import java.time.LocalDate;
|
||||||
import java.time.ZoneId;
|
import java.time.ZoneId;
|
||||||
|
import java.time.temporal.ChronoUnit;
|
||||||
import java.util.Calendar;
|
import java.util.Calendar;
|
||||||
import java.util.Date;
|
import java.util.Date;
|
||||||
import java.util.TimeZone;
|
import java.util.TimeZone;
|
||||||
|
@ -23,6 +25,14 @@ public class DateComparisonUtils {
|
||||||
return localDate1.isEqual(localDate2);
|
return localDate1.isEqual(localDate2);
|
||||||
}
|
}
|
||||||
|
|
||||||
|
public static boolean isSameDayUsingInstant(Date date1, Date date2) {
|
||||||
|
Instant instant1 = date1.toInstant()
|
||||||
|
.truncatedTo(ChronoUnit.DAYS);
|
||||||
|
Instant instant2 = date2.toInstant()
|
||||||
|
.truncatedTo(ChronoUnit.DAYS);
|
||||||
|
return instant1.equals(instant2);
|
||||||
|
}
|
||||||
|
|
||||||
public static boolean isSameDayUsingSimpleDateFormat(Date date1, Date date2) {
|
public static boolean isSameDayUsingSimpleDateFormat(Date date1, Date date2) {
|
||||||
SimpleDateFormat fmt = new SimpleDateFormat("yyyyMMdd");
|
SimpleDateFormat fmt = new SimpleDateFormat("yyyyMMdd");
|
||||||
return fmt.format(date1)
|
return fmt.format(date1)
|
|
@ -0,0 +1,19 @@
|
||||||
|
package com.baeldung.timer;
|
||||||
|
|
||||||
|
import java.util.List;
|
||||||
|
import java.util.TimerTask;
|
||||||
|
|
||||||
|
public class DatabaseMigrationTask extends TimerTask {
|
||||||
|
private List<String> oldDatabase;
|
||||||
|
private List<String> newDatabase;
|
||||||
|
|
||||||
|
public DatabaseMigrationTask(List<String> oldDatabase, List<String> newDatabase) {
|
||||||
|
this.oldDatabase = oldDatabase;
|
||||||
|
this.newDatabase = newDatabase;
|
||||||
|
}
|
||||||
|
|
||||||
|
@Override
|
||||||
|
public void run() {
|
||||||
|
newDatabase.addAll(oldDatabase);
|
||||||
|
}
|
||||||
|
}
|
|
@ -0,0 +1,14 @@
|
||||||
|
package com.baeldung.timer;
|
||||||
|
|
||||||
|
import java.time.Instant;
|
||||||
|
import java.time.LocalDateTime;
|
||||||
|
import java.time.ZoneId;
|
||||||
|
import java.util.TimerTask;
|
||||||
|
|
||||||
|
public class NewsletterTask extends TimerTask {
|
||||||
|
@Override
|
||||||
|
public void run() {
|
||||||
|
System.out.println("Email sent at: "
|
||||||
|
+ LocalDateTime.ofInstant(Instant.ofEpochMilli(scheduledExecutionTime()), ZoneId.systemDefault()));
|
||||||
|
}
|
||||||
|
}
|
|
@ -1,13 +1,13 @@
|
||||||
package com.baeldung.date.comparison;
|
package com.baeldung.date.comparison;
|
||||||
|
|
||||||
import org.junit.Test;
|
import static org.junit.Assert.assertFalse;
|
||||||
|
import static org.junit.Assert.assertTrue;
|
||||||
|
|
||||||
import java.time.LocalDateTime;
|
import java.time.LocalDateTime;
|
||||||
import java.time.ZoneId;
|
import java.time.ZoneId;
|
||||||
import java.util.Date;
|
import java.util.Date;
|
||||||
|
|
||||||
import static org.junit.Assert.assertFalse;
|
import org.junit.Test;
|
||||||
import static org.junit.Assert.assertTrue;
|
|
||||||
|
|
||||||
public class DateComparisonUtilsUnitTest {
|
public class DateComparisonUtilsUnitTest {
|
||||||
|
|
||||||
|
@ -23,6 +23,7 @@ public class DateComparisonUtilsUnitTest {
|
||||||
@Test
|
@Test
|
||||||
public void givenDatesWithDifferentTime_whenIsSameDay_thenReturnsTrue() {
|
public void givenDatesWithDifferentTime_whenIsSameDay_thenReturnsTrue() {
|
||||||
assertTrue(DateComparisonUtils.isSameDayUsingLocalDate(day1Morning, day1Evening));
|
assertTrue(DateComparisonUtils.isSameDayUsingLocalDate(day1Morning, day1Evening));
|
||||||
|
assertTrue(DateComparisonUtils.isSameDayUsingInstant(day1Morning, day1Evening));
|
||||||
assertTrue(DateComparisonUtils.isSameDayUsingSimpleDateFormat(day1Morning, day1Evening));
|
assertTrue(DateComparisonUtils.isSameDayUsingSimpleDateFormat(day1Morning, day1Evening));
|
||||||
assertTrue(DateComparisonUtils.isSameDayUsingCalendar(day1Morning, day1Evening));
|
assertTrue(DateComparisonUtils.isSameDayUsingCalendar(day1Morning, day1Evening));
|
||||||
assertTrue(DateComparisonUtils.isSameDayUsingApacheCommons(day1Morning, day1Evening));
|
assertTrue(DateComparisonUtils.isSameDayUsingApacheCommons(day1Morning, day1Evening));
|
||||||
|
@ -35,6 +36,9 @@ public class DateComparisonUtilsUnitTest {
|
||||||
assertFalse(DateComparisonUtils.isSameDayUsingLocalDate(day1Morning, day2Morning));
|
assertFalse(DateComparisonUtils.isSameDayUsingLocalDate(day1Morning, day2Morning));
|
||||||
assertFalse(DateComparisonUtils.isSameDayUsingLocalDate(day1Evening, day2Morning));
|
assertFalse(DateComparisonUtils.isSameDayUsingLocalDate(day1Evening, day2Morning));
|
||||||
|
|
||||||
|
assertFalse(DateComparisonUtils.isSameDayUsingInstant(day1Morning, day2Morning));
|
||||||
|
assertFalse(DateComparisonUtils.isSameDayUsingInstant(day1Evening, day2Morning));
|
||||||
|
|
||||||
assertFalse(DateComparisonUtils.isSameDayUsingSimpleDateFormat(day1Morning, day2Morning));
|
assertFalse(DateComparisonUtils.isSameDayUsingSimpleDateFormat(day1Morning, day2Morning));
|
||||||
assertFalse(DateComparisonUtils.isSameDayUsingSimpleDateFormat(day1Evening, day2Morning));
|
assertFalse(DateComparisonUtils.isSameDayUsingSimpleDateFormat(day1Evening, day2Morning));
|
||||||
|
|
|
@ -9,12 +9,6 @@ import static org.junit.Assert.assertEquals;
|
||||||
|
|
||||||
public class DateUtilsUnitTest {
|
public class DateUtilsUnitTest {
|
||||||
|
|
||||||
@Test
|
|
||||||
public void givenTimeMillis_thenDateIsReturned() {
|
|
||||||
Date now = DateUtils.getNow();
|
|
||||||
assertEquals(DateUtils.getDate(now.getTime()), now);
|
|
||||||
}
|
|
||||||
|
|
||||||
@Test
|
@Test
|
||||||
public void givenDateAndPattern_thenDateIsCorrectlyReturned() throws ParseException {
|
public void givenDateAndPattern_thenDateIsCorrectlyReturned() throws ParseException {
|
||||||
long milliseconds = new Date(2020 - 1900, 0, 1).getTime();
|
long milliseconds = new Date(2020 - 1900, 0, 1).getTime();
|
|
@ -9,11 +9,6 @@ import org.junit.Test;
|
||||||
|
|
||||||
public class DateUtilsUnitTest {
|
public class DateUtilsUnitTest {
|
||||||
|
|
||||||
@Test
|
|
||||||
public void givenCurrentDate_thenTodayIsReturned() {
|
|
||||||
assertEquals(DateUtils.getNow().toLocalDate(), LocalDate.now());
|
|
||||||
}
|
|
||||||
|
|
||||||
@Test(expected = IllegalArgumentException.class)
|
@Test(expected = IllegalArgumentException.class)
|
||||||
public void givenDateAsString_whenPatternIsNotRespected_thenExceptionIsThrown() {
|
public void givenDateAsString_whenPatternIsNotRespected_thenExceptionIsThrown() {
|
||||||
DateUtils.getDate("2020 01 01");
|
DateUtils.getDate("2020 01 01");
|
|
@ -1,22 +1,13 @@
|
||||||
package com.baeldung.datetime.sql;
|
package com.baeldung.datetime.sql;
|
||||||
|
|
||||||
import static org.junit.Assert.assertEquals;
|
|
||||||
|
|
||||||
import org.junit.Test;
|
import org.junit.Test;
|
||||||
|
|
||||||
import com.baeldung.datetime.sql.TimestampUtils;
|
|
||||||
|
|
||||||
import java.text.ParseException;
|
import java.text.ParseException;
|
||||||
import java.util.Date;
|
|
||||||
|
import static org.junit.Assert.assertEquals;
|
||||||
|
|
||||||
public class TimestampUtilsUnitTest {
|
public class TimestampUtilsUnitTest {
|
||||||
|
|
||||||
@Test
|
|
||||||
public void givenCurrentTimestamp_thenNowIsReturned() {
|
|
||||||
assertEquals(TimestampUtils.getNow()
|
|
||||||
.getTime(), new Date().getTime());
|
|
||||||
}
|
|
||||||
|
|
||||||
@Test(expected = IllegalArgumentException.class)
|
@Test(expected = IllegalArgumentException.class)
|
||||||
public void givenTimestampAsString_whenPatternIsNotRespected_thenExceptionIsThrown() {
|
public void givenTimestampAsString_whenPatternIsNotRespected_thenExceptionIsThrown() {
|
||||||
TimestampUtils.getTimestamp("2020/01/01 10:11-12");
|
TimestampUtils.getTimestamp("2020/01/01 10:11-12");
|
|
@ -0,0 +1,44 @@
|
||||||
|
package com.baeldung.timer;
|
||||||
|
|
||||||
|
import org.junit.jupiter.api.Test;
|
||||||
|
|
||||||
|
import java.time.LocalDateTime;
|
||||||
|
import java.time.ZoneId;
|
||||||
|
import java.util.*;
|
||||||
|
|
||||||
|
import static org.assertj.core.api.Assertions.assertThat;
|
||||||
|
|
||||||
|
class DatabaseMigrationTaskUnitTest {
|
||||||
|
@Test
|
||||||
|
void givenDatabaseMigrationTask_whenTimerScheduledForNowPlusTwoSeconds_thenDataMigratedAfterTwoSeconds() throws Exception {
|
||||||
|
List<String> oldDatabase = Arrays.asList("Harrison Ford", "Carrie Fisher", "Mark Hamill");
|
||||||
|
List<String> newDatabase = new ArrayList<>();
|
||||||
|
|
||||||
|
LocalDateTime twoSecondsLater = LocalDateTime.now().plusSeconds(2);
|
||||||
|
Date twoSecondsLaterAsDate = Date.from(twoSecondsLater.atZone(ZoneId.systemDefault()).toInstant());
|
||||||
|
|
||||||
|
new Timer().schedule(new DatabaseMigrationTask(oldDatabase, newDatabase), twoSecondsLaterAsDate);
|
||||||
|
|
||||||
|
while (LocalDateTime.now().isBefore(twoSecondsLater)) {
|
||||||
|
assertThat(newDatabase).isEmpty();
|
||||||
|
Thread.sleep(500);
|
||||||
|
}
|
||||||
|
assertThat(newDatabase).containsExactlyElementsOf(oldDatabase);
|
||||||
|
}
|
||||||
|
|
||||||
|
@Test
|
||||||
|
void givenDatabaseMigrationTask_whenTimerScheduledInTwoSeconds_thenDataMigratedAfterTwoSeconds() throws Exception {
|
||||||
|
List<String> oldDatabase = Arrays.asList("Harrison Ford", "Carrie Fisher", "Mark Hamill");
|
||||||
|
List<String> newDatabase = new ArrayList<>();
|
||||||
|
|
||||||
|
new Timer().schedule(new DatabaseMigrationTask(oldDatabase, newDatabase), 2000);
|
||||||
|
|
||||||
|
LocalDateTime twoSecondsLater = LocalDateTime.now().plusSeconds(2);
|
||||||
|
|
||||||
|
while (LocalDateTime.now().isBefore(twoSecondsLater)) {
|
||||||
|
assertThat(newDatabase).isEmpty();
|
||||||
|
Thread.sleep(500);
|
||||||
|
}
|
||||||
|
assertThat(newDatabase).containsExactlyElementsOf(oldDatabase);
|
||||||
|
}
|
||||||
|
}
|
|
@ -0,0 +1,33 @@
|
||||||
|
package com.baeldung.timer;
|
||||||
|
|
||||||
|
import org.junit.jupiter.api.AfterEach;
|
||||||
|
import org.junit.jupiter.api.Test;
|
||||||
|
|
||||||
|
import java.util.Timer;
|
||||||
|
|
||||||
|
class NewsletterTaskUnitTest {
|
||||||
|
private final Timer timer = new Timer();
|
||||||
|
|
||||||
|
@AfterEach
|
||||||
|
void afterEach() {
|
||||||
|
timer.cancel();
|
||||||
|
}
|
||||||
|
|
||||||
|
@Test
|
||||||
|
void givenNewsletterTask_whenTimerScheduledEachSecondFixedDelay_thenNewsletterSentEachSecond() throws Exception {
|
||||||
|
timer.schedule(new NewsletterTask(), 0, 1000);
|
||||||
|
|
||||||
|
for (int i = 0; i < 3; i++) {
|
||||||
|
Thread.sleep(1000);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
@Test
|
||||||
|
void givenNewsletterTask_whenTimerScheduledEachSecondFixedRate_thenNewsletterSentEachSecond() throws Exception {
|
||||||
|
timer.scheduleAtFixedRate(new NewsletterTask(), 0, 1000);
|
||||||
|
|
||||||
|
for (int i = 0; i < 3; i++) {
|
||||||
|
Thread.sleep(1000);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
|
@ -0,0 +1,45 @@
|
||||||
|
package com.baeldung.datebasics;
|
||||||
|
|
||||||
|
import java.time.Clock;
|
||||||
|
import java.time.LocalDate;
|
||||||
|
import java.time.Month;
|
||||||
|
import java.time.ZoneId;
|
||||||
|
import java.time.format.DateTimeFormatter;
|
||||||
|
|
||||||
|
public class CreateDate {
|
||||||
|
public LocalDate getTodaysDate() {
|
||||||
|
return LocalDate.now();
|
||||||
|
}
|
||||||
|
|
||||||
|
public LocalDate getTodaysDateFromClock() {
|
||||||
|
return LocalDate.now(Clock.systemDefaultZone());
|
||||||
|
}
|
||||||
|
|
||||||
|
public LocalDate getTodaysDateFromZone(String zone) {
|
||||||
|
return LocalDate.now(ZoneId.of(zone));
|
||||||
|
}
|
||||||
|
|
||||||
|
public LocalDate getCustomDateOne(int year, int month, int dayOfMonth) {
|
||||||
|
return LocalDate.of(year, month, dayOfMonth);
|
||||||
|
}
|
||||||
|
|
||||||
|
public LocalDate getCustomDateTwo(int year, Month month, int dayOfMonth) {
|
||||||
|
return LocalDate.of(year, month, dayOfMonth);
|
||||||
|
}
|
||||||
|
|
||||||
|
public LocalDate getDateFromEpochDay(long epochDay) {
|
||||||
|
return LocalDate.ofEpochDay(epochDay);
|
||||||
|
}
|
||||||
|
|
||||||
|
public LocalDate getDateFromYearAndDayOfYear(int year, int dayOfYear) {
|
||||||
|
return LocalDate.ofYearDay(year, dayOfYear);
|
||||||
|
}
|
||||||
|
|
||||||
|
public LocalDate getDateFromString(String date) {
|
||||||
|
return LocalDate.parse(date);
|
||||||
|
}
|
||||||
|
|
||||||
|
public LocalDate getDateFromStringAndFormatter(String date, String pattern) {
|
||||||
|
return LocalDate.parse(date, DateTimeFormatter.ofPattern(pattern));
|
||||||
|
}
|
||||||
|
}
|
|
@ -0,0 +1,56 @@
|
||||||
|
package com.baeldung.datebasics;
|
||||||
|
|
||||||
|
import static org.junit.Assert.assertEquals;
|
||||||
|
|
||||||
|
import java.time.Month;
|
||||||
|
|
||||||
|
import org.junit.Test;
|
||||||
|
|
||||||
|
public class CreateDateUnitTest {
|
||||||
|
private CreateDate date = new CreateDate();
|
||||||
|
|
||||||
|
@Test
|
||||||
|
public void whenUsingNowMethod_thenLocalDate() {
|
||||||
|
assertEquals("2020-01-08", date.getTodaysDate());
|
||||||
|
}
|
||||||
|
|
||||||
|
@Test
|
||||||
|
public void whenUsingClock_thenLocalDate() {
|
||||||
|
assertEquals("2020-01-08", date.getTodaysDateFromClock());
|
||||||
|
}
|
||||||
|
|
||||||
|
@Test
|
||||||
|
public void givenValues_whenUsingZone_thenLocalDate() {
|
||||||
|
assertEquals("2020-01-08", date.getTodaysDateFromZone("Asia/Kolkata"));
|
||||||
|
}
|
||||||
|
|
||||||
|
@Test
|
||||||
|
public void givenValues_whenUsingOfMethod_thenLocalDate() {
|
||||||
|
assertEquals("2020-01-08", date.getCustomDateOne(2020, 1, 8));
|
||||||
|
}
|
||||||
|
|
||||||
|
@Test
|
||||||
|
public void givenValuesWithMonthEnum_whenUsingOfMethod_thenLocalDate() {
|
||||||
|
assertEquals("2020-01-08", date.getCustomDateTwo(2020, Month.JANUARY, 8));
|
||||||
|
}
|
||||||
|
|
||||||
|
@Test
|
||||||
|
public void givenValues_whenUsingEpochDay_thenLocalDate() {
|
||||||
|
assertEquals("2020-01-08", date.getDateFromEpochDay(18269));
|
||||||
|
}
|
||||||
|
|
||||||
|
@Test
|
||||||
|
public void givenValues_whenUsingYearDay_thenLocalDate() {
|
||||||
|
assertEquals("2020-01-08", date.getDateFromYearAndDayOfYear(2020, 8));
|
||||||
|
}
|
||||||
|
|
||||||
|
@Test
|
||||||
|
public void givenValues_whenUsingParse_thenLocalDate() {
|
||||||
|
assertEquals("2020-01-08", date.getDateFromString("2020-01-08"));
|
||||||
|
}
|
||||||
|
|
||||||
|
@Test
|
||||||
|
public void givenValuesWithFormatter_whenUsingParse_thenLocalDate() {
|
||||||
|
assertEquals("2020-01-08", date.getDateFromStringAndFormatter("8-Jan-2020", "d-MMM-yyyy"));
|
||||||
|
}
|
||||||
|
}
|
|
@ -0,0 +1,14 @@
|
||||||
|
package com.baeldung.finallykeyword;
|
||||||
|
|
||||||
|
public class FinallyExample {
|
||||||
|
|
||||||
|
public void printCount(String count) {
|
||||||
|
try {
|
||||||
|
System.out.println("The count is " + Integer.parseInt(count));
|
||||||
|
} catch (NumberFormatException e) {
|
||||||
|
System.out.println("No count");
|
||||||
|
} finally {
|
||||||
|
System.out.println("In finally");
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
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Reference in New Issue