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Java Guava BigIntegerMath isPowerOfTwo()用法及代码示例


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

参考: https://google.github.io/guava/releases/21.0/api/docs/com/google/common/math/BigIntegerMath.html#isPowerOfTwo-java.math.BigInteger-



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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。