Calling Random Classes

You could use Java's Random Class and use its nextInt(n) function, with a switch statement to choose the next sound file and questions.

Example code: (I didn't run this, should work though)

Code (Text):

1. import java.util.Random;
2.  
3. public class YourClass
4. {
5.      private static final int MAX_NUMBER=5; //number of sounds
6.      private Random rnd= new Random(); //declaring random number generator and initializing it
7.  
8.      private void choose ()
9.      {
10.           //choose a random number from 0 to (1 below MAX_NUMBER)
11.           switch(rnd.nextInt(MAX_NUMBER))
12.           {
13.                 case 0:
14.                           // if 1st sound is picked, do stuff
15.                          break;
16.                 case 1:
17.                           // if 2nd sound is picked, do stuff
18.                          break;
19.                 case 2:
20.                           // if 3rd sound is picked, do stuff
21.                          break;
22.                 case 3:
23.                           // if 4th sound is picked, do stuff
24.                          break;
25.                 case 4:
26.                           // if 5th sound is picked, do stuff
27.                          break;
28.                 //keep going until you have a case for each sound
29.                 //in this case with MAX_NUMBER at 5, I would stop at 4
30.           }
31.      }
32. }

Just add in the declaration and a similar method into the class you're using and that should work