Java Integer numberOfTrailingZeros() Method

The numberOfTrailingZeros() method is a method of Integer class under java.lang package. This method returns the total number of zero bits following the lowest-order ("rightmost") one's-bit in the two's complement binary representation of the specified integer value i.e. it converts int value to Binary then considers the right-most one bit and return total number of zero bits following it. In other words, if the specified integer value has no one-bits or is equal to zero in its two's complement representation then it will return 32.

Exaplanation:

Suppose, Integer Value = 52
Binary Equivalent = 110100
Lowest(Right-Most Bit) =  At position 3
numberOfTrailingZeros = 2

Syntax:

Following is the declaration of numberOfTrailingZeros() method:

Parameter:

DataType	Parameter	Description	Required/Optional
int	i	It accepts integer value which returns lowest order bit on its 2's complement.	Required

Returns:

The numberOfTrailingZeros() method returns the number of zero bits following the lowest-order ("rightmost") one-bit in the two's complement binary representation of the specified integer value, or 32 if the value is equal to zero.

Exceptions:

Compatibility Version:

Java 1.5 and above

Example 1

public class IntegerNumberOfTrailingZerosExample1 {
	public static void main(String[] args) {
	System.out.println("Trailing Zero's: "+Integer.numberOfTrailingZeros(10));       
    }
}

Output:

Trailing Zero's: 1

Example 2

public class IntegerNumberOfTrailingZerosExample2 {
	public static void main(String[] args) {
		int value = 56;
		//Get the binary equivalent of this Integer value
		System.out.print("Binary equivalent: "+Integer.toBinaryString(value));
		//Print the number of Trailing zeros
		System.out.print("\nNumber of Trailing Zeros: "+Integer.numberOfTrailingZeros(value));
    }
}

Output:

Binary equivalent: 111000
Number of Trailing Zeros: 3

Example 3

import java.util.Scanner;
public class IntegerNumberOfTrailingZerosExample3 {
	public static void main(String[] args) {
		//Get Numeric value from Console
		System.out.print("Enter the desired Integer value: ");
		Scanner readInput = new Scanner(System.in);
		int value = readInput.nextInt();
		readInput.close();
		//Get the binary equivalent of this Integer value
		System.out.print("Binary equivalent: "+Integer.toBinaryString(value));
		//Print the number of Trailing zeros
		System.out.print("\nNumber of Trailing Zeros: "+Integer.numberOfTrailingZeros(value));
    }
}

Output:

Enter the desired Integer value: 52
Binary equivalent: 110100
Number of Trailing Zeros: 2

Example 4

public class IntegerNumberOfTrailingZerosExample4 {
	public static void main(String[] args) {
	  int num = -15;
        System.out.print("Input Number = " + num);
        // Returns the number of zero bits following the Lowest rightmost one-bit
        System.out.print("\nNumber of Trailing Zeros = "+Integer.numberOfTrailingZeros(num));       
    }
}

Output:

Input Number = -15
Number of Trailing Zeros = 0

Example 5

public class IntegerNumberOfTrailingZerosExample5 {
	public static void main(String[] args) {
	System.out.println("Trailing Zero's: "+Integer.numberOfTrailingZeros(0));       
    }
}

Output: