how to restart in java japplet?

[game2d]

how to restart a game? problem with my code is that when it restarts it double the enemy. so there are 10 enemies and lets say player dies than user restart and now there are 20 enemies and so on.....

in start method i am create 10 enemies and storing in arraylist

public void start()
{
for(int i = 0; i < 10; i++){  
    enemyObject = new Enemy(10*i,10);
    enemyStore.add(enemyObject);    //store in array
}
}

in here i am making enemy move, collision etc and if enemy is dead than i am remooving it from arraylist

public void actionPerformed(ActionEvent e)
{
	for(int i = 0; i < enemyStore.size(); i++){       
		enemyObject = (Enemy)enemyStore.get(i);
			if(!enemyObject.getDead()){               //if enemy is not died
				//make enemy move, collision etc... here
                                ....
			}
			else{           //remove enemy and create another one
				enemyStore.remove(i);
				enemyObject = new Enemy(10*i, 10); //create enemy
				enemyStore.add(enemyObject);                                               //store in array
			}
		}
}

in paint method paint enemy

public class Display extends JPanel
{
    public void paintComponent(Graphics g){	
	super.paintComponent(g);
         
	for(int i = 0; i < enemyStore.size(); i++){      //PAINT ENEMY
		enemyObject = (Enemy)enemyStore.get(i);
		enemyObject.paint(g);
	}
    }
}

in there if player dies than remove all enemies in arraylist and restart

public void mouseClicked(MouseEvent e)
{
if(playerObject.getDead()){
	if(e.getX() > bx && e.getX() < bx + bw)	{
		if(e.getY() > by && e.getY() < by + bh){
			for(int i = 0; i < enemyStore2.size(); i++){
				enemyStore2.remove(i);	
			}		
			start();
		 }
	 }
  }
}

[Rabbit]

Remove all the enemies before adding them.

[Nepomuk]

To expand on what Rabbit said: your start() method creates new enemies every time it's called and adds them to the enemyStore collection. Now, I don't know what type of collection you're using for "enemyStore " (it's not a simple array, that's for sure - the simple array doesn't have an "add(...)" function) but every standard collection implements the Collection interface and should therefore have the functions clear(), remove(Object o) and removeAll(Colle ction<?> c). If you use one of those to remove the current enemies before adding new ones, the problem should be solved.

[Sherin]

That's because you can't init() again after the applet has stopped. There is nothing to call the method.

Why don't you create a reset() method that gives default values to your variables etc and makes it seem like the applet has restarted?