BigInteger setBit() Method in Java (original) (raw)

Last Updated : 3 Mar, 2022

The java.math.BigInteger.setbit(index) method returns a Big-integer whose value is equivalent to this Big-integer with the designated bit set. The method computes (this | (1<<n)). The bit at index n of binary representation of Big-integer will be set means converted to 1.

Syntax:

public BigInteger setbit(int n)

Parameters: The method takes one parameter n which refers to the index of the bit that is needed to be set.
Return Value: The method returns the BigInteger value after setting the bit position n.
Exceptions: The method might throw an ArithmeticException when n is negative..

Examples:

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

Below program illustrate the setBit(index) method of BigInteger:

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);
}

}

`

Output:

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

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