Java BigInteger setBit()用法及代碼示例

java.math.BigInteger.setbit(index)方法返回一個Big-integer，其值與此指定位設置的Big-integer等效。該方法計算(this |(1

用法:

public BigInteger setbit(int n)

參數：該方法采用一個參數n，該參數指的是需要設置的位的索引。

返回值：設置位位置n後，該方法返回BigInteger值。

異常：當n為負數時，該方法可能會引發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

以下示例程序旨在說明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); 
    } 
}

輸出：

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

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

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注：本文由純淨天空篩選整理自AmanSingh2210大神的英文原創作品 BigInteger setBit() Method in Java。非經特殊聲明，原始代碼版權歸原作者所有，本譯文未經允許或授權，請勿轉載或複製。