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Java Integer class bitCount() method with example

Integer class bitCount() method: Here, we are going to learn about the bitCount() method of Integer class with its syntax and example.
Submitted by Preeti Jain, on September 27, 2019

Integer class bitCount() method

  • bitCount() method is available in java.lang package.
  • bitCount() method is used to find the number of 1's bits in the 2's complement binary denotation of the given parameter [value] of integer type.
  • bitCount() method is a static method, it is accessible with the class name too and if we try to access the method with the class object then also we will not get an error.
  • bitCount() method does not throw an exception at the time of counting bits.

Syntax:

    public static int bitCount(int value);

Parameter(s):

  • int value – represents the integer value to be parsed.

Return value:

The return type of this method is int, it returns the number of 1's bits in the 2's complements of the given integer value.

Example:

// Java program to demonstrate the example 
// of bitCount(int value) method of Integer class

public class BitCountOfIntegerClass {
    public static void main(String[] args) {
        int value = 1296;

        // It returns the string representation of the given unsigned 
        // integer value denoted by the argument in binary by calling
        // Integer.toBinaryString(value)
        System.out.println("Integer.toBinaryString(value): " + Integer.toBinaryString(value));

        // It returns the number of 1's bits in 2's complement 
        //of the given argument 'value' by calling   //Integer.bitCount(value)
        System.out.println("Integer.bitCount(value):  " + Integer.bitCount(value));
    }
}

Output

Integer.toBinaryString(value): 10100010000
Integer.bitCount(value):  3






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