How To Move Zeros To End Of An Array?

Problem :

Write a Java program to separate zeros from non-zeros in the given array. You have to move zeros either to end of the array or bring them to beginning of the array. For example, if{14, 0, 5, 2, 0, 3, 0} is the given array, then moving zeros to end of the array will result {14, 5, 2, 3, 0, 0, 0}

import java.util.Arrays;

 

public class MoveZerosToEndOfAnArray

{

    static void moveZerosToEnd(int inputArray[])

    {

        //Initializing counter to 0

 

        int counter = 0;

 

        //Traversing inputArray from left to right

 

        for (int i = 0; i < inputArray.length; i++)

        {

            //If inputArray[i] is non-zero

 

            if(inputArray[i] != 0)

            {

                //Assigning inputArray[i] to inputArray[counter]

 

                inputArray[counter] = inputArray[i];

 

                //Incrementing the counter by 1

 

                counter++;

            }

        }

 

        //Assigning zero to remaining elements

 

        while (counter < inputArray.length)

        {

            inputArray[counter] = 0;

 

            counter++;

        }

 

        System.out.println(Arrays.toString(inputArray));

    }

 

    public static void main(String[] args)

    {

        moveZerosToEnd(new int[] {12, 0, 7, 0, 8, 0, 3});

 

        moveZerosToEnd(new int[] {1, -5, 0, 0, 8, 0, 1});

 

        moveZerosToEnd(new int[] {0, 1, 0, 1, -5, 0, 4});

 

        moveZerosToEnd(new int[] {-4, 1, 0, 0, 2, 21, 4});

    }

}

Output :

[12, 7, 8, 3, 0, 0, 0]

[1, -5, 8, 1, 0, 0, 0]

[1, 1, -5, 4, 0, 0, 0]

[-4, 1, 2, 21, 4, 0, 0]