Random number picker

rand.java

import java.util.*;
public class rand {
  public static void main(String[] args) {
    ArrayList<Integer> al = new ArrayList<Integer>();
    for(int i = 0; i < 10; ++i) {
      al.add(i);
    }
    Random r = new Random();
    ArrayList<Integer> result = new ArrayList<Integer>();
    for(int i = 0; i < 5; ++i) {
      int index = r.nextInt(al.size());
      result.add(al.remove(index));
    }
    System.out.println(result);
  }
}