Count_Sort.java

import javax.swing.JOptionPane;
import java.util.*;

public class Count_Sort {
    public static void main(){
        // get the array size from the user
        int size = 0;
        while(size <= 0){
            size = Integer.parseInt(JOptionPane.showInputDialog("How big is the array you want to sort?"));

            if(size <= 0){
                JOptionPane.showMessageDialog(null, "Array size must be greater than 0");

            }
        }   

        // create a new array and populate each element with the users input
        double[] array = new double[size];
        
        for(int i = 0;i < size; i++){
            array[i] = Double.parseDouble(JOptionPane.showInputDialog("Please enter element " + (i + 1) + " for this array"));
        }

        // output the original array
        System.out.print("\n Original Array: " + array[0]);
        for(int i = 1; i < size; i++){
            System.out.print(", " + array[i]);
        }

        // sort the array
        countSort(array, size);

        // output the sorted array
        System.out.print("\n Sorted Array: " + array[0]);
        for(int i = 1; i < size; i++){
            System.out.print(", " + array[i]);
        }
    }

    static void countSort(double[] array, int size){
        double[] c = new double[size+1];
        Arrays.fill(c, 0);

        for(int i : input){
            c[i] += 1;
        }
    }
}