Java Integer numberOfLeadingZeros() method

The numberOfLeadingZeros()  method of Java Integer class returns the total number of zero bits preceding the highest-order one-bit in the 2’s complement binary representation of the specified int value.  Syntax public static int numberOfLeadingZeros (int i)  Parameters The parameter ‘i’ represents a value whose number of leading zeros is to be determined.  Return Value This method returns:

• The Number of zero bits preceding the highest-order one-bit in the 2’s complement binary representation.
• 32 if the value is equal to zero.

Example 1

public class JavaIntegerNumberOfLeadingZerosExample1 {
    public static void main(String[] args) {
        Integer val1=78;
        //returns the Number of zero bits preceding the highest-order one-bit in the 2’s complement binary representation
        int i= Integer.numberOfLeadingZeros(val1);
        System.out.println("Number of leading zeros returned : "+i);
    }
}

Output

Number of leading zeros returned : 25

Example 2

public class JavaIntegerNumberOfLeadingZerosExample2 {
    public static void main(String[] args) {
        Integer val1=0;
        //returns 32 if the value is equal to zero
        int i= Integer.numberOfLeadingZeros(val1);
        System.out.println("Number of leading zeros returned : "+i);
    }
}

Output

Number of leading zeros returned : 32

Example 3

public class JavaIntegerNumberOfLeadingZerosExample3 {
    public static void main(String[] args) {
        Integer val1=Integer.MIN_VALUE;
        //returns 0 if the value is equal to MAX_VALUE
        int i= Integer.numberOfLeadingZeros(val1);
        System.out.println("Number of leading zeros returned : "+i);
    }
}

Output

Number of leading zeros returned : 0