Question

How to count the number of 1 bit in a given number with Java

Answer 1

public class MyClass {
    private static int Count1Bit(int n) {
        int count = 0;
        
        while (n > 0) {
            count += n & 1;
            n >>= 1;
        }
        return count;
    }
    public static void main(String args[]) {
        int n = 95; // 0101 1111
        
        int count = Count1Bit(n);
        
        System.out.println("Number of 1 bit = " + count);
    }
}




/*
run:
      
Number of 1 bit = 6
      
*/

 

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