Java中的 BigInteger setBit() 方法
Java.math.BigInteger.setbit(index)方法返回一个Big-integer,它的值等于这个带有指定位集的Big-integer。该方法计算 (this | (1< 句法: 参数:该方法采用一个参数n ,该参数是指需要设置的位的索引。 例子: 下面的程序说明了 BigInteger 的 setBit(index) 方法: 参考: https: Java/math/BigInteger.html#setBit(int)public BigInteger setbit(int n)
返回值:该方法在设置位位置 n 后返回 BigInteger 值。
异常:当 n 为负数时,该方法可能会抛出ArithmeticException 。Input: value = 2300 index = 1
Output: 2302
Explanation:
Binary Representation of 2300 = 100011111100
bit at index 1 is 0 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
Java
// 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);
}
}
After applying setBit at index 1 of 2300 New Value is 2302