Java BigInteger setBit()用法及代码示例

java.math.BigInteger.setbit(index)方法返回一个Big-integer，其值与此指定位设置的Big-integer等效。该方法计算(this |(1

用法:

public BigInteger setbit(int n)

参数：该方法采用一个参数n，该参数指的是需要设置的位的索引。

返回值：设置位位置n后，该方法返回BigInteger值。

异常：当n为负数时，该方法可能会引发ArithmeticException。

例子：

Input: value = 2300 index = 1
Output: 2302
Explanation:
Binary Representation of 2300 = 100011111100
bit at index 3 is 1 so set the bit at index 1 
Now Binary Representation becomes 100011111110
and Decimal equivalent of 100011111110 is 2302

Input: value = 5482549 index = 1
Output: 5482551

以下示例程序旨在说明BigInteger的setBit(index)方法：

// Program to demonstrate setBit() method of BigInteger  
  
import java.math.*; 
  
public class GFG { 
  
    public static void main(String[] args) 
    { 
  
        // Creating BigInteger object 
        BigInteger biginteger = new BigInteger("2300"); 
  
        // Creating an integer i for index 
        int i = 1; 
  
        // Calling setBit() method on bigInteger at index i 
        // store the return BigInteger 
        BigInteger changedvalue = biginteger.setBit(i); 
  
        String result = "After applying setBit at index " +  
        i + " of " + biginteger+ " New Value is " + changedvalue; 
  
        // Displaying the result 
        System.out.println(result); 
    } 
}

输出：

After applying setBit at index 1 of 2300 New Value is 2302

参考： https://docs.oracle.com/javase/7/docs/api/java/math/BigInteger.html#setBit(int)

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注：本文由纯净天空筛选整理自AmanSingh2210大神的英文原创作品 BigInteger setBit() Method in 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。