BigInteger flipBit() Method in Java
Prerequisite: BigInteger Basics
The java.math.BigInteger.flipBit(index) method returns a BigInteger which is used to flip a particular bit position in a BigInteger. This method Computes (bigInteger ^ (1<<n)). The bit at index n of binary representation of the bigInteger will be flipped. That is, if the bit position is 0 it will be converted to 1 and vice versa.
public BigInteger flipBit(int index)
Parameter:The method accepts one parameter index of integer type and refers to the position of the of bit to be flipped.
Return Value: The method returns the bigInteger after flipping its bit at position index.
Throws: The method throws an ArithmeticException when the value of index is negative.
Input: value = 2300 , index = 1 Output: 2302 Explanation: Binary Representation of 2300 = 100011111100 bit at index 1 is 0 so flip the bit at index 1 and it becomes 1. Now Binary Representation becomes 100011111110 and Decimal equivalent of 100011111110 is 2302 Input: value = 5482549 , index = 5 Output: 5482517
Below program illustrate flipBit(index) method of BigInteger.
After applying flipBit at index 5 of 5482549 New Value is 5482517