如果x表示2的幂,则Guava的BigIntegerMath类的isPowerOfTwo(BigInteger x)方法将返回true。
用法:
public static boolean isPowerOfTwo(BigInteger x)
参数:此方法将BigInteger数字x作为要检查的参数。
返回值:如果x为2的幂,则此方法返回true。
以下示例说明了BifIntegerMath.isPowerOfTwo()方法:
范例1:
// Java code to show implementation of
// isPowerOfTwo(BigInteger x) method of
// Guava's BigIntegerMath class
import java.math.*;
import com.google.common.math.BigIntegerMath;
class GFG {
// Driver code
public static void main(String args[])
{
BigInteger a1 = BigInteger.valueOf(63);
// Using isPowerOfTwo(BigInteger x) method
// of Guava's BigIntegerMath class
if (BigIntegerMath.isPowerOfTwo(a1))
System.out.println(a1 + " is power of 2");
else
System.out.println(a1 + " is not power of 2");
BigInteger a2 = BigInteger.valueOf(1024);
// Using isPowerOfTwo(BigInteger x) method
// of Guava's BigIntegerMath class
if (BigIntegerMath.isPowerOfTwo(a2))
System.out.println(a2 + " is power of 2");
else
System.out.println(a2 + " is not power of 2");
}
}
输出:
63 is not power of 2 1024 is power of 2
范例2:
// Java code to show implementation of
// isPowerOfTwo(BigInteger x) method of
// Guava's BigIntegerMath class
import java.math.*;
import com.google.common.math.BigIntegerMath;
class GFG {
// Driver code
public static void main(String args[])
{
BigInteger a1 = BigInteger.valueOf(1);
// Using isPowerOfTwo(BigInteger x) method
// of Guava's BigIntegerMath class
if (BigIntegerMath.isPowerOfTwo(a1))
System.out.println(a1 + " is power of 2");
else
System.out.println(a1 + " is not power of 2");
BigInteger a2 = BigInteger.valueOf(567);
// Using isPowerOfTwo(BigInteger x) method
// of Guava's BigIntegerMath class
if (BigIntegerMath.isPowerOfTwo(a2))
System.out.println(a2 + " is power of 2");
else
System.out.println(a2 + " is not power of 2");
}
}
输出:
1 is power of 2 567 is not power of 2
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注:本文由纯净天空筛选整理自Sahil_Bansall大神的英文原创作品 BigIntegerMath isPowerOfTwo() function | Guava | Java。非经特殊声明,原始代码版权归原作者所有,本译文未经允许或授权,请勿转载或复制。