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Merge pull request #1132 from akiyamaneko/patch-4

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NumberUtil 增加新功能 isPowerOfTwo 判断整数是否是2的幂
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Golden Looly
2020-09-28 15:04:09 +08:00
committed by GitHub
parent 3c1bae5cb5 77cc55a277
commit d763282047
2 changed files with 21 additions and 0 deletions
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10
hutool-core/src/test/java/cn/hutool/core/util/NumberUtilTest.java
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@@ -254,4 +254,14 @@ public class NumberUtilTest {
final BigDecimal mul = NumberUtil.mul(new BigDecimal("10"), null);
Assert.assertEquals(BigDecimal.ZERO, mul);
}
@Test
public void isPowerOfTwoTest() {
Assert.assertEquals(false, NumberUtil.isPowerOfTwo(-1));
Assert.assertEquals(true, NumberUtil.isPowerOfTwo(16));
Assert.assertEquals(true, NumberUtil.isPowerOfTwo(65536));
Assert.assertEquals(true, NumberUtil.isPowerOfTwo(1));
Assert.assertEquals(false, NumberUtil.isPowerOfTwo(17));
}
}