Java - Integer Class bitCount() Method

Integer class bitCount() method: Here, we are going to learn about the bitCount() method of Integer class with its syntax and example. By Preeti Jain Last updated : March 18, 2024

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);

Parameters

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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