BigInteger bitCount() in Java

bitCount(): This method is available in java.math.BigInteger class of Java.

Syntax:

int java.math.BigInteger.bitCount()

It returns the number of bits in the two's complement representation of this BigInteger that differs from its sign bit. This method is useful when implementing bit-vector style sets atop BigIntegers.

Returns: number of bits in the two's complement representation of this BigInteger that differ from its sign bit.

For Example:

BigInteger bigInteger = new BigInteger("-12345")

bigInteger.bitCount() = > It returns 5.

Approach

Java

import java.math.BigInteger;

public class BigIntegerbitCount {

    public static void main(String[] args) {

        BigInteger bigInteger = new BigInteger("-12345");
        System.out.println(bigInteger.bitCount());

    }
}

Output:

5