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Java Long class numberOfLeadingZeros() method with example

Long class numberOfLeadingZeros() method: Here, we are going to learn about the numberOfLeadingZeros() method of Long class with its syntax and example.
Submitted by Preeti Jain, on October 11, 2019

Long class numberOfLeadingZeros() method

  • numberOfLeadingZeros() method is available in java.lang package.
  • numberOfLeadingZeros() method is used to returns the number of 0's bits preceding the leftmost one bit in the 2's complement of the given parameter [value] of long type. Otherwise, it returns 64 if the given parameter value is 0.
  • numberOfLeadingZeros() 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.
  • numberOfLeadingZeros() method does not throw an exception.

Syntax:

    public static int numberOfLeadingZeros (long value);

Parameter(s):

  • long value – represents the long value to be parsed.

Return value:

The return type of this method is int, it returns the integer value based on the following cases,

  • If the given argument is non-zero then, it returns the number of 0's bits preceding the leftmost one bit of the given long value.
  • Else, if the given argument is zero then, it returns the value 64.

Example:

// Java program to demonstrate the example 
// of numberOfLeadingZeros (long value) method of Long class

public class NumberOfLeadingZerosOfLongClass {
    public static void main(String[] args) {

        long value1 = 1296;
        long value2 = 0;

        // It returns the string representation of the given unsigned 
        // long value denoted by the argument in binary by calling
        // Long.toBinaryString(value1)
        System.out.println("Long.toBinaryString(value1): " + Long.toBinaryString(value1));

        // It returns the string representation of the given unsigned 
        // long value denoted by the argument in binary by calling
        // Long.toBinaryString(value2)
        System.out.println("Long.toBinaryString(value2): " + Long.toBinaryString(value2));

        // It returns the number of 0's bits preceding the leftmost side 
        // one bit in the given argument 'value' by calling 
        // Long.numberOfLeadingZeros(value1)
        System.out.println("Long.numberOfLeadingZeros(value1): " + Long.numberOfLeadingZeros(value1));

        // It returns the value 64 because the value of the given 
        // argument is zero 
        System.out.println("Long.numberOfLeadingZeros(value2): " + Long.numberOfLeadingZeros(value2));
    }
}

Output

Long.toBinaryString(value1): 10100010000
Long.toBinaryString(value2): 0
Long.numberOfLeadingZeros(value1): 53
Long.numberOfLeadingZeros(value2): 64





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