Getting Enemy Objects to Draw Images

Question

Hello!
I am coding a simple game as a practice example. The premise is your player appears on the left of the screen, while enemies swarm from the right side. You can fire your gun which creates Bullet objects that kill the zombies.
My problem is coming from a little detail I want to implement. Basically I want my zombies to have a chance of mumbling, something along the lines of "brains" "mmm" and other Zombie text. I have these as gif images, and I want to display the image as long as the Zombie remains mumbling. This is done in my drawZombie(Graphics g) method.
I have implemented a method but it doesn't seem to work. I am running through an array of Zombies and checking if they are mumbling, if they are not I set them to mumble if the event occurs using a Random object. All of the zombies appear to have the event occur at the same time and as result they all speak at once, following the same intervals.
http://data.tumblr.com/XaNEMhnY045oyvsjV6Wq94hE_500.gif
Within Zombie Class:
     public void zombieChange()
          if(alive)
               //Mumbles:          
               if(isMumbling == false)
                    checkMumble();
               xPos = xPos - speed;
               frame++;
               if(frame >= walk.length)
                    frame = 0;
     public void checkMumble()
          text = (int)Math.random() * 4;
          if(text < 1)
               isMumbling = true;
               text = r.nextInt(3) + 1;
     public void drawZombie(Graphics g)
          if(alive)
               g.drawImage(walk[frame], xPos, yPos, parent);
               if(isMumbling && textDuration > 0)
                    if(text == 1)
                         g.drawImage(ugh, xPos+5, yPos-20, parent);
                    else if(text == 2)
                         g.drawImage(mmm, xPos+5, yPos-20, parent);
                    else
                         g.drawImage(brains, xPos+5, yPos-20, parent);
                    textDuration = textDuration - 1;                    
               else {isMumbling = false; textDuration = 50;}
          }Within Main Class:
               for(Zombie e : z)
                    if(e != null)
                         e.zombieChange();
                         //Check Player Death:
                         if(e.getXPos()-10 < playerOne.getXPos())
                              System.out.println("hit");
                              playerOne.setIsFiring(false);
                              playerOne.setIsStill(false);
                              playerOne.setIsMovingLeft(false);
                              playerOne.setIsMovingRight(false);
                              playerOne.setIsAlive(false);
               }Here is the source:
http://www.sendspace.com/file/093qz5
http://www.megaupload.com/?d=ZBJB9HH7
What is the problem? Any ideas? I am aware there are errors in my code, I am just fooling around with ideas for now. Thanks.

Answer 1

Look at the line:
          text = (int)Math.random() * 4;Math.random() returns a number >= 0.0 and < 1.0. This is cast to an int then multipled by 4. However, the cast will always truncate the value to zero, thus text will alway equal zero after this line. Why not just use text = r.nextInt(4) instead? You already have the Random and use it in the next couple lines.