!1062 修改注释错误并添加单测

Merge pull request !1062 from handy/v5-handy

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

@@ -2948,10 +2948,10 @@ public class NumberUtil {
 	/**
 	 * 检查是否为有效的数字<br>
 	 * 检查Double和Float是否为无限大，或者Not a Number<br>
-	 * 非数字类型和Null将返回true
+	 * 非数字类型和Null将返回false
 	 *
 	 * @param number 被检查类型
-	 * @return 检查结果，非数字类型和Null将返回true
+	 * @return 检查结果，非数字类型和Null将返回false
 	 * @since 4.6.7
 	 */
 	public static boolean isValidNumber(Number number) {

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

@@ -220,6 +220,12 @@ public class NumberUtilTest {
 		Assert.assertEquals("467.81", format);
 	}
 
+	@Test
+	public void isValidNumberTest() {
+		boolean validNumber = NumberUtil.isValidNumber(1);
+        Assert.assertTrue(validNumber);
+	}
+
 	@Test
 	public void decimalFormatMoneyTest() {
 		final double c = 299792400.543534534;