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Merge pull request #6890 from sushant57/master 

Move Set Related Articles to new module
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ashleyfrieze 2019-05-16 10:11:23 +01:00 committed by GitHub
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7 changed files with 144 additions and 134 deletions
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6
guava-collections-set/README.md
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@ -1,4 +1,8 @@
# Guava
### Relevant Articles:
## Relevant Articles:
- [Guava – Sets](http://www.baeldung.com/guava-sets)
- [Guide to Guava RangeSet](http://www.baeldung.com/guava-rangeset)
- [Guava Set + Function = Map](http://www.baeldung.com/guava-set-function-map-tutorial)
- [Guide to Guava Multiset](https://www.baeldung.com/guava-multiset)

9
guava-collections/src/test/java/org/baeldung/guava/GuavaMapFromSet.java → guava-collections-set/src/test/java/org/baeldung/guava/GuavaMapFromSet.java
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@ -1,14 +1,9 @@
package org.baeldung.guava;
import java.util.AbstractMap;
import java.util.AbstractSet;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;
import java.util.WeakHashMap;
import com.google.common.base.Function;
import java.util.*;
public class GuavaMapFromSet<K, V> extends AbstractMap<K, V> {
private class SingleEntry implements Entry<K, V> {

7
guava-collections/src/test/java/org/baeldung/guava/GuavaMapFromSetUnitTest.java → guava-collections-set/src/test/java/org/baeldung/guava/GuavaMapFromSetUnitTest.java
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@ -1,15 +1,14 @@
package org.baeldung.guava;
import static org.junit.Assert.assertTrue;
import com.google.common.base.Function;
import org.junit.Test;
import java.util.Arrays;
import java.util.Map;
import java.util.Set;
import java.util.TreeSet;
import org.junit.Test;
import com.google.common.base.Function;
import static org.junit.Assert.assertTrue;
public class GuavaMapFromSetUnitTest {

8
guava-collections/src/test/java/org/baeldung/guava/GuavaRangeSetUnitTest.java → guava-collections-set/src/test/java/org/baeldung/guava/GuavaRangeSetUnitTest.java
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@ -1,13 +1,12 @@
package org.baeldung.guava;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.assertFalse;
import org.junit.Test;
import com.google.common.collect.ImmutableRangeSet;
import com.google.common.collect.Range;
import com.google.common.collect.RangeSet;
import com.google.common.collect.TreeRangeSet;
import org.junit.Test;
import static org.junit.Assert.*;
public class GuavaRangeSetUnitTest {
@ -122,6 +121,5 @@ public class GuavaRangeSetUnitTest {
.add(Range.closed(0, 2))
.add(Range.closed(3, 5))
.add(Range.closed(5, 8)).build();
}
}

131
guava-collections-set/src/test/java/org/baeldung/guava/GuavaSetOperationsUnitTest.java Normal file
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@ -0,0 +1,131 @@
package org.baeldung.guava;
import com.google.common.base.Function;
import com.google.common.base.Joiner;
import com.google.common.collect.*;
import org.junit.Test;
import java.util.List;
import java.util.Set;
import static org.hamcrest.Matchers.contains;
import static org.hamcrest.Matchers.containsInAnyOrder;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertThat;
import static org.junit.Assert.assertTrue;
public class GuavaSetOperationsUnitTest {
@Test
public void whenCalculatingUnionOfSets_thenCorrect() {
final Set<Character> first = ImmutableSet.of('a', 'b', 'c');
final Set<Character> second = ImmutableSet.of('b', 'c', 'd');
final Set<Character> union = Sets.union(first, second);
assertThat(union, containsInAnyOrder('a', 'b', 'c', 'd'));
}
@Test
public void whenCalculatingCartesianProductOfSets_thenCorrect() {
final Set<Character> first = ImmutableSet.of('a', 'b');
final Set<Character> second = ImmutableSet.of('c', 'd');
final Set<List<Character>> result = Sets.cartesianProduct(ImmutableList.of(first, second));
final Function<List<Character>, String> func = new Function<List<Character>, String>() {
@Override
public final String apply(final List<Character> input) {
return Joiner
.on(" ").join(input);
}
};
final Iterable<String> joined = Iterables.transform(result, func);
assertThat(joined, containsInAnyOrder("a c", "a d", "b c", "b d"));
}
@Test
public void whenCalculatingSetIntersection_thenCorrect() {
final Set<Character> first = ImmutableSet.of('a', 'b', 'c');
final Set<Character> second = ImmutableSet.of('b', 'c', 'd');
final Set<Character> intersection = Sets.intersection(first, second);
assertThat(intersection, containsInAnyOrder('b', 'c'));
}
@Test
public void whenCalculatingSetSymmetricDifference_thenCorrect() {
final Set<Character> first = ImmutableSet.of('a', 'b', 'c');
final Set<Character> second = ImmutableSet.of('b', 'c', 'd');
final Set<Character> intersection = Sets.symmetricDifference(first, second);
assertThat(intersection, containsInAnyOrder('a', 'd'));
}
@Test
public void whenCalculatingPowerSet_thenCorrect() {
final Set<Character> chars = ImmutableSet.of('a', 'b');
final Set<Set<Character>> result = Sets.powerSet(chars);
final Set<Character> empty = ImmutableSet.<Character> builder().build();
final Set<Character> a = ImmutableSet.of('a');
final Set<Character> b = ImmutableSet.of('b');
final Set<Character> aB = ImmutableSet.of('a', 'b');
assertThat(result, contains(empty, a, b, aB));
}
@Test
public void whenCreatingRangeOfIntegersSet_thenCreated() {
final int start = 10;
final int end = 30;
final ContiguousSet<Integer> set = ContiguousSet.create(Range.closed(start, end), DiscreteDomain.integers());
assertEquals(21, set.size());
assertEquals(10, set.first().intValue());
assertEquals(30, set.last().intValue());
}
@Test
public void whenUsingRangeSet_thenCorrect() {
final RangeSet<Integer> rangeSet = TreeRangeSet.create();
rangeSet.add(Range.closed(1, 10));
rangeSet.add(Range.closed(12, 15));
assertEquals(2, rangeSet.asRanges().size());
rangeSet.add(Range.closed(10, 12));
assertTrue(rangeSet.encloses(Range.closed(1, 15)));
assertEquals(1, rangeSet.asRanges().size());
}
@Test
public void whenInsertDuplicatesInMultiSet_thenInserted() {
final Multiset<String> names = HashMultiset.create();
names.add("John");
names.add("Adam", 3);
names.add("John");
assertEquals(2, names.count("John"));
names.remove("John");
assertEquals(1, names.count("John"));
assertEquals(3, names.count("Adam"));
names.remove("Adam", 2);
assertEquals(1, names.count("Adam"));
}
@Test
public void whenGetTopOcurringElementsWithMultiSet_thenCorrect() {
final Multiset<String> names = HashMultiset.create();
names.add("John");
names.add("Adam", 5);
names.add("Jane");
names.add("Tom", 2);
final Set<String> sorted = Multisets.copyHighestCountFirst(names).elementSet();
final List<String> topTwo = Lists.newArrayList(sorted).subList(0, 2);
assertEquals(2, topTwo.size());
assertEquals("Adam", topTwo.get(0));
assertEquals("Tom", topTwo.get(1));
}
}

3
guava-collections/README.md
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@ -11,13 +11,10 @@
- [Filtering and Transforming Collections in Guava](http://www.baeldung.com/guava-filter-and-transform-a-collection)
- [Guava – Join and Split Collections](http://www.baeldung.com/guava-joiner-and-splitter-tutorial)
- [Guava – Lists](http://www.baeldung.com/guava-lists)
- [Guava – Sets](http://www.baeldung.com/guava-sets)
- [Guava – Maps](http://www.baeldung.com/guava-maps)
- [Guide to Guava Multimap](http://www.baeldung.com/guava-multimap)
- [Guide to Guava RangeSet](http://www.baeldung.com/guava-rangeset)
- [Guide to Guava RangeMap](http://www.baeldung.com/guava-rangemap)
- [Guide to Guava MinMaxPriorityQueue and EvictingQueue](http://www.baeldung.com/guava-minmax-priority-queue-and-evicting-queue)
- [Initialize a HashMap in Java](https://www.baeldung.com/java-initialize-hashmap)
- [Guava Set + Function = Map](http://www.baeldung.com/guava-set-function-map-tutorial)
- [Guide to Guava Table](http://www.baeldung.com/guava-table)
- [Guide to Guava ClassToInstanceMap](http://www.baeldung.com/guava-class-to-instance-map)

114
guava-collections/src/test/java/org/baeldung/guava/GuavaCollectionTypesUnitTest.java
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@ -111,120 +111,6 @@ public class GuavaCollectionTypesUnitTest {
assertThat(immutable, contains("John", "Adam", "Jane", "Tom"));
}
// sets
@Test
public void whenCalculateUnionOfSets_thenCorrect() {
final Set<Character> first = ImmutableSet.of('a', 'b', 'c');
final Set<Character> second = ImmutableSet.of('b', 'c', 'd');
final Set<Character> union = Sets.union(first, second);
assertThat(union, containsInAnyOrder('a', 'b', 'c', 'd'));
}
@Test
public void whenCalculateSetsProduct_thenCorrect() {
final Set<Character> first = ImmutableSet.of('a', 'b');
final Set<Character> second = ImmutableSet.of('c', 'd');
final Set<List<Character>> result = Sets.cartesianProduct(ImmutableList.of(first, second));
final Function<List<Character>, String> func = new Function<List<Character>, String>() {
@Override
public final String apply(final List<Character> input) {
return Joiner.on(" ").join(input);
}
};
final Iterable<String> joined = Iterables.transform(result, func);
assertThat(joined, containsInAnyOrder("a c", "a d", "b c", "b d"));
}
@Test
public void whenCalculatingSetIntersection_thenCorrect() {
final Set<Character> first = ImmutableSet.of('a', 'b', 'c');
final Set<Character> second = ImmutableSet.of('b', 'c', 'd');
final Set<Character> intersection = Sets.intersection(first, second);
assertThat(intersection, containsInAnyOrder('b', 'c'));
}
@Test
public void whenCalculatingSetSymmetricDifference_thenCorrect() {
final Set<Character> first = ImmutableSet.of('a', 'b', 'c');
final Set<Character> second = ImmutableSet.of('b', 'c', 'd');
final Set<Character> intersection = Sets.symmetricDifference(first, second);
assertThat(intersection, containsInAnyOrder('a', 'd'));
}
@Test
public void whenCalculatingPowerSet_thenCorrect() {
final Set<Character> chars = ImmutableSet.of('a', 'b');
final Set<Set<Character>> result = Sets.powerSet(chars);
final Set<Character> empty = ImmutableSet.<Character> builder().build();
final Set<Character> a = ImmutableSet.of('a');
final Set<Character> b = ImmutableSet.of('b');
final Set<Character> aB = ImmutableSet.of('a', 'b');
assertThat(result, contains(empty, a, b, aB));
}
@Test
public void whenCreateRangeOfIntegersSet_thenCreated() {
final int start = 10;
final int end = 30;
final ContiguousSet<Integer> set = ContiguousSet.create(Range.closed(start, end), DiscreteDomain.integers());
assertEquals(21, set.size());
assertEquals(10, set.first().intValue());
assertEquals(30, set.last().intValue());
}
@Test
public void whenCreateRangeSet_thenCreated() {
final RangeSet<Integer> rangeSet = TreeRangeSet.create();
rangeSet.add(Range.closed(1, 10));
rangeSet.add(Range.closed(12, 15));
assertEquals(2, rangeSet.asRanges().size());
rangeSet.add(Range.closed(10, 12));
assertTrue(rangeSet.encloses(Range.closed(1, 15)));
assertEquals(1, rangeSet.asRanges().size());
}
@Test
public void whenInsertDuplicatesInMultiSet_thenInserted() {
final Multiset<String> names = HashMultiset.create();
names.add("John");
names.add("Adam", 3);
names.add("John");
assertEquals(2, names.count("John"));
names.remove("John");
assertEquals(1, names.count("John"));
assertEquals(3, names.count("Adam"));
names.remove("Adam", 2);
assertEquals(1, names.count("Adam"));
}
@Test
public void whenGetTopUsingMultiSet_thenCorrect() {
final Multiset<String> names = HashMultiset.create();
names.add("John");
names.add("Adam", 5);
names.add("Jane");
names.add("Tom", 2);
final Set<String> sorted = Multisets.copyHighestCountFirst(names).elementSet();
final List<String> topTwo = Lists.newArrayList(sorted).subList(0, 2);
assertEquals(2, topTwo.size());
assertEquals("Adam", topTwo.get(0));
assertEquals("Tom", topTwo.get(1));
}
@Test
public void whenCreateImmutableMap_thenCreated() {
final Map<String, Integer> salary = ImmutableMap.<String, Integer> builder().put("John", 1000).put("Jane", 1500).put("Adam", 2000).put("Tom", 2000).build();