The Java Random class

Question

Hi, everyone
I have a question about the Random class
The following class can choose number randomly. But sometimes it chooses a number for more than once. How do I make it choose the numbers randomly but have no repetition. Thank you very much!
import java.util.*;
public class CodeTest
  public static void main(String[]args)
   System.out.println("random number");
   CodeTest x = new CodeTest();
   x.randomNum();
    public void randomNum()
        Random generator = new Random();
        for (int i = 0; i < 10; i++)
            int randomNumber = generator.nextInt(10);
            System.out.println (randomNumber);
}And what if I have 15 numbers and I just want to pick out ten of them randomly, again, no repetition.
Thank you very much!
Edited by: Terry001 on Apr 21, 2008 7:51 PM

Answer 1

Can you give me some codes to demonstrate how to shuffle the Array[],please? And if I want to store the possible numbers in ArrayList, is there any difference?
Thank you!
Edited by: Terry001 on Apr 21, 2008 8:36 PM