Merge pull request #7774 from catalin-burcea/BAEL-16629

[BAEL-16629] Split or move java-numbers module

java-numbers-2/README.md

@@ -1,2 +1,10 @@
 ## Relevant Articles
 - [Lossy Conversion in Java](https://www.baeldung.com/java-lossy-conversion)
+- [A Guide to the Java Math Class](https://www.baeldung.com/java-lang-math)
+- [Calculate the Area of a Circle in Java](https://www.baeldung.com/java-calculate-circle-area)
+- [NaN in Java](http://www.baeldung.com/java-not-a-number)
+- [Generating Prime Numbers in Java](http://www.baeldung.com/java-generate-prime-numbers)
+- [Using Math.pow in Java](http://www.baeldung.com/java-math-pow)
+- [Check If a Number Is Prime in Java](http://www.baeldung.com/java-prime-numbers)
+- [Binary Numbers in Java](https://www.baeldung.com/java-binary-numbers)
+- [Finding the Least Common Multiple in Java](https://www.baeldung.com/java-least-common-multiple)

java-numbers-2/src/main/java/com/baeldung/prime/PrimeGenerator.java

@@ -1,59 +1,59 @@
-package com.baeldung.prime;
+package com.baeldung.prime;
-
+
-import java.util.Arrays;
+import java.util.Arrays;
-import java.util.LinkedList;
+import java.util.LinkedList;
-import java.util.List;
+import java.util.List;
-import java.util.stream.Collectors;
+import java.util.stream.Collectors;
-import java.util.stream.IntStream;
+import java.util.stream.IntStream;
-
+
-public class PrimeGenerator {
+public class PrimeGenerator {
-    public static List<Integer> sieveOfEratosthenes(int n) {
+    public static List<Integer> sieveOfEratosthenes(int n) {
-        final boolean prime[] = new boolean[n + 1];
+        final boolean prime[] = new boolean[n + 1];
-        Arrays.fill(prime, true);
+        Arrays.fill(prime, true);
-
+
-        for (int p = 2; p * p <= n; p++) {
+        for (int p = 2; p * p <= n; p++) {
-            if (prime[p]) {
+            if (prime[p]) {
-                for (int i = p * 2; i <= n; i += p)
+                for (int i = p * 2; i <= n; i += p)
-                    prime[i] = false;
+                    prime[i] = false;
-            }
+            }
-        }
+        }
-
+
-        final List<Integer> primes = new LinkedList<>();
+        final List<Integer> primes = new LinkedList<>();
-        for (int i = 2; i <= n; i++) {
+        for (int i = 2; i <= n; i++) {
-            if (prime[i])
+            if (prime[i])
-                primes.add(i);
+                primes.add(i);
-        }
+        }
-        return primes;
+        return primes;
-    }
+    }
-
+
-    public static List<Integer> primeNumbersBruteForce(int max) {
+    public static List<Integer> primeNumbersBruteForce(int max) {
-        final List<Integer> primeNumbers = new LinkedList<Integer>();
+        final List<Integer> primeNumbers = new LinkedList<Integer>();
-        for (int i = 2; i <= max; i++) {
+        for (int i = 2; i <= max; i++) {
-            if (isPrimeBruteForce(i)) {
+            if (isPrimeBruteForce(i)) {
-                primeNumbers.add(i);
+                primeNumbers.add(i);
-            }
+            }
-        }
+        }
-        return primeNumbers;
+        return primeNumbers;
-    }
+    }
-
+
-    private static boolean isPrimeBruteForce(int x) {
+    private static boolean isPrimeBruteForce(int x) {
-        for (int i = 2; i < x; i++) {
+        for (int i = 2; i < x; i++) {
-            if (x % i == 0) {
+            if (x % i == 0) {
-                return false;
+                return false;
-            }
+            }
-        }
+        }
-        return true;
+        return true;
-    }
+    }
-
+
-    public static List<Integer> primeNumbersTill(int max) {
+    public static List<Integer> primeNumbersTill(int max) {
-        return IntStream.rangeClosed(2, max)
+        return IntStream.rangeClosed(2, max)
-            .filter(x -> isPrime(x))
+            .filter(x -> isPrime(x))
-            .boxed()
+            .boxed()
-            .collect(Collectors.toList());
+            .collect(Collectors.toList());
-    }
+    }
-
+
-    private static boolean isPrime(int x) {
+    private static boolean isPrime(int x) {
-        return IntStream.rangeClosed(2, (int) (Math.sqrt(x)))
+        return IntStream.rangeClosed(2, (int) (Math.sqrt(x)))
-            .allMatch(n -> x % n != 0);
+            .allMatch(n -> x % n != 0);
-    }
+    }
-}
+}

java-numbers-2/src/test/java/com/baeldung/prime/PrimeGeneratorUnitTest.java

@@ -1,28 +1,29 @@
-package com.baeldung.prime;
+package com.baeldung.prime;
-
+
-import java.util.Arrays;
+import org.junit.Test;
-import java.util.List;
+
-import org.junit.Test;
+import java.util.Arrays;
-
+import java.util.List;
-import static com.baeldung.prime.PrimeGenerator.*;
+
-import static org.junit.Assert.*;
+import static com.baeldung.prime.PrimeGenerator.*;
-
+import static org.junit.Assert.*;
-public class PrimeGeneratorUnitTest {
+
-    @Test
+public class PrimeGeneratorUnitTest {
-    public void whenBruteForced_returnsSuccessfully() {
+    @Test
-        final List<Integer> primeNumbers = primeNumbersBruteForce(20);
+    public void whenBruteForced_returnsSuccessfully() {
-        assertEquals(Arrays.asList(new Integer[] { 2, 3, 5, 7, 11, 13, 17, 19 }), primeNumbers);
+        final List<Integer> primeNumbers = primeNumbersBruteForce(20);
-    }
+        assertEquals(Arrays.asList(new Integer[] { 2, 3, 5, 7, 11, 13, 17, 19 }), primeNumbers);
-
+    }
-    @Test
+
-    public void whenOptimized_returnsSuccessfully() {
+    @Test
-        final List<Integer> primeNumbers = primeNumbersTill(20);
+    public void whenOptimized_returnsSuccessfully() {
-        assertEquals(Arrays.asList(new Integer[] { 2, 3, 5, 7, 11, 13, 17, 19 }), primeNumbers);
+        final List<Integer> primeNumbers = primeNumbersTill(20);
-    }
+        assertEquals(Arrays.asList(new Integer[] { 2, 3, 5, 7, 11, 13, 17, 19 }), primeNumbers);
-
+    }
-    @Test
+
-    public void whenSieveOfEratosthenes_returnsSuccessfully() {
+    @Test
-        final List<Integer> primeNumbers = sieveOfEratosthenes(20);
+    public void whenSieveOfEratosthenes_returnsSuccessfully() {
-        assertEquals(Arrays.asList(new Integer[] { 2, 3, 5, 7, 11, 13, 17, 19 }), primeNumbers);
+        final List<Integer> primeNumbers = sieveOfEratosthenes(20);
-    }
+        assertEquals(Arrays.asList(new Integer[] { 2, 3, 5, 7, 11, 13, 17, 19 }), primeNumbers);
-}
+    }
+}

java-numbers/README.md

@@ -4,11 +4,7 @@
 
 ### Relevant Articles: 
 - [Number of Digits in an Integer in Java](http://www.baeldung.com/java-number-of-digits-in-int)
-- [NaN in Java](http://www.baeldung.com/java-not-a-number)
 - [How to Round a Number to N Decimal Places in Java](http://www.baeldung.com/java-round-decimal-number)
-- [Check If a Number Is Prime in Java](http://www.baeldung.com/java-prime-numbers)
-- [Using Math.pow in Java](http://www.baeldung.com/java-math-pow)
-- [Generating Prime Numbers in Java](http://www.baeldung.com/java-generate-prime-numbers)
 - [BigDecimal and BigInteger in Java](http://www.baeldung.com/java-bigdecimal-biginteger)
 - [Find All Pairs of Numbers in an Array That Add Up to a Given Sum](http://www.baeldung.com/java-algorithm-number-pairs-sum)
 - [Java – Random Long, Float, Integer and Double](http://www.baeldung.com/java-generate-random-long-float-integer-double)
@@ -17,5 +13,3 @@
 - [Calculating the nth Root in Java](https://www.baeldung.com/java-nth-root)
 - [Convert Double to String, Removing Decimal Places](https://www.baeldung.com/java-double-to-string)
 - [Changing the Order in a Sum Operation Can Produce Different Results?](https://www.baeldung.com/java-floating-point-sum-order)
-- [Calculate the Area of a Circle in Java](https://www.baeldung.com/java-calculate-circle-area)
-- [A Guide to the Java Math Class](https://www.baeldung.com/java-lang-math)