Shuffle array lists in same fashion (java)

Using Collections.shuffle

By passing randomizer with same seed to Collections.shuffle function, you can shuffle array lists in same fashion.

App.java

package com.sample.app;

import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import java.util.Random;

public class App {

 private static void printList(List list) {
  for (Object obj : list) {
   System.out.print(obj + " ");
  }
  System.out.println();
 }

 public static void main(String args[]) {
  List<Integer> ids = Arrays.asList(1, 2, 3, 4, 5);
  List<Character> chars = Arrays.asList('a', 'b', 'c', 'd', 'e');

  long seed = System.currentTimeMillis();

  Random rand1 = new Random(seed);
  Random rand2 = new Random(seed);

  Collections.shuffle(ids, rand1);
  Collections.shuffle(chars, rand2);

  printList(ids);
  printList(chars);

 }
}

Output

2 4 3 1 5

b d c a e

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