Countingsort.java

import java.util.*;


public class Countingsort {

    public static void sort(int arr[]){
        int largest = Integer.MIN_VALUE;
        for(int i =0; i<arr.length;i++){
            largest = Math.max(largest, arr[i]);
        }
        int count[] = new int[largest +1];
        for(int i =0; i<arr.length; i++) {
            count[arr[i]]++;
        }
        int j= 0;
        for(int i = 0;i<count.length; i++){
            while(count[i] > 0){
                arr[j] = i;
                j++;
                count[i]--;
            }
        }
    }
    public static void printArr(int arr[]){
        for(int i = 0; i<arr.length; i++){
            System.out.print(arr[i] + " ");
        }
        System.out.println();
    }
    
    public static void main(String[] args) {
        int arr[] ={5, 4, 1, 3, 2};
        sort(arr);
        printArr(arr);
    }
}