BigInteger bitCount() Method in Java

Prerequisite: BigInteger Basics 
The java.math.BigInteger.bitCount() method returns number of bits in the two's complement representation of this BigInteger that differ from its sign bit. This method is useful when implementing bit-vector style sets atop BigIntegers.
Syntax: 
 

public int bitCount()

Parameters: The method does not take any parameters.
Return Value: The method is used to return the number of bits in the two's complement representation of this BigInteger that differ from its sign bit.
Examples: 
 

Input: value = 2300 Output: 7 Explanation: Binary signed 2's complement of 2300 = 0000100011111100 Signed bit is 0 because 2300 is positive so no of 1 in 0000100011111100 is bitCount So bitCount in 0000100011111100 = 7 Input: value = 5482549 Output: 11

Below program illustrate the bitCount() method of BigInteger. 
 

/* *Program Demonstrate bitCount() method of BigInteger  */ import java.math.*; public class GFG {  public static void main(String[] args)  {  // Creates BigInteger objects  BigInteger biginteger = new BigInteger("2300");  // Calling bitCount() method on bigInteger  int count = biginteger.bitCount();  String result = "BitCount of " + biginteger + " is " + count;  // Print result  System.out.println(result);  } } 

BitCount of 2300 is 7

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