Shuffle an Integer Array In Java

By Sidharth Patnaik -
This program can be used to shuffle an integer array using java. Basically user gives an integer array then this array is converted to an arraylist of integer type. Then that array list is passed to a predefined function shuffle() from the collection class !

Screenshot:



The Code 
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Scanner;

public class Shuffle {
  public static void main(String args[]) {
    List<Integer> dataList = new ArrayList<Integer>();
    Scanner s=new Scanner(System.in);
    int n[]=new int[4];
    for(int i=0;i<4;i++)
    {
  n[i]=s.nextInt();
  dataList.add(n[i]);
 }
 /*Alternate Method: 
  * for(int i=0;i<4;i++) dataList.add(s.nextInt()); */
    Collections.shuffle(dataList);
    int[] num = new int[dataList.size()];
    for (int i = 0; i < dataList.size(); i++) {
      num[i] = dataList.get(i);
    }
 System.out.println("Shuffled Array is : ");
    for (int i = 0; i < num.length; i++) {
      System.out.println(num[i]);
    }
  }
}

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