19 Aug Integer.lowestOneBit() method in Java

To understand the concept of Integer.lowestOneBit(), let’s say we have a decimal value:

155

The Binary of 155 is:

10011011

The lowest one bit is at position 1, therefore the lowestOneBit() method returns a single bit with the position of the rightmost one-bit value. The value returned is int.

Example 1

Following is an example to get the position of rightmost one-bit using Integer.lowestOneBit():

public class Example {

   public static void main(String []args){
    
        // decimal value
        int a = 5;
        
        System.out.println("Decimal Value = "+a);
        
        // binary value
        System.out.println("Binary Value = "+Integer.toBinaryString(a));

        // displaying the lowest one bit position
        System.out.println("Lowest one bit position = " + Integer.lowestOneBit(a));
     }
}

Output

Decimal Value = 5
Binary Value = 101
Lowest one bit position = 1

Example 2

public class Example {

    public static void main(String []args){
    
        // decimal value
        int a = 155;
        
        System.out.println("Decimal Value = "+a);
        
        // binary value
        System.out.println("Binary Value = "+Integer.toBinaryString(a));

        // displaying the lowest one bit position
        System.out.println("Lowest one bit position = " + Integer.lowestOneBit(a));
     }
}

Output

Decimal Value = 155
Binary Value = 10011011
Lowest one bit position = 1

Example 3

If the decimal value passes is 0, the lowestOneBit() method returns 0 as in the below example:

public class Example {

     public static void main(String []args){
    
        // decimal value
        int a = 0;
        
        System.out.println("Decimal Value = "+a);
        
        // binary value
        System.out.println("Binary Value = "+Integer.toBinaryString(a));

        // displaying the lowest one bit position
        System.out.println("Lowest one bit position = " + Integer.lowestOneBit(a));
     }
}

Output

Decimal Value = 0
Binary Value = 0
Lowest one bit position = 0