!474 新增数值奇偶数判断

Merge pull request !474 from GuoZG/v5-dev

hutool-core/src/main/java/cn/hutool/core/util/NumberUtil.java

@@ -2707,6 +2707,34 @@ public class NumberUtil {
 		}
 	}
 
+	/**
+	 * 检查是否为奇数<br>
+	 *
+	 * @param num 被判断的数值
+	 * @return 是否是奇数
+	 * @author GuoZG
+	 */
+	public static boolean isOdd(int num) {
+		if ((num & 1) == 1) {
+			return true;
+		}
+		return false;
+	}
+
+	/**
+	 * 检查是否为偶数<br>
+	 *
+	 * @param num 被判断的数值
+	 * @return 是否是偶数
+	 * @author GuoZG
+	 */
+	public static boolean isEven(int num) {
+		if (!isOdd(num)) {
+			return true;
+		}
+		return false;
+	}
+
 	// ------------------------------------------------------------------------------------------- Private method start
 	private static int mathSubNode(int selectNum, int minNum) {
 		if (selectNum == minNum) {

hutool-core/src/test/java/cn/hutool/core/util/NumberUtilTest.java

@@ -412,4 +412,16 @@ public class NumberUtilTest {
 		final Integer[] integers = NumberUtil.generateBySet(10, 100, 5);
 		Assert.assertEquals(5, integers.length);
 	}
+
+	@Test
+	public void isOddOrEvenTest(){
+		int[] a = { 0, 32, -32, 123, -123 };
+		for (int i : a) {
+			Console.log(i + "为奇数:" + NumberUtil.isOdd(i));
+			Console.log(i + "为偶数:" + NumberUtil.isEven(i));
+		}
+	}
+
+
+
 }