public void addFleet(){ // Creates a fleet of boats
		for(int i=0; i<GameConfiguration.gameConfiguration_NBSHIP; i++){
			boolean add = false;
			while(!add) {
				Ship s = null;				
				int x = (int) (Math.random()*4);
				int y = (int) (Math.random()*4);
				char orient;
				int orien = (int) Math.random();
				if (orien==0) orient='h';
				else orient='v';
				switch(i) {
				case 0:
					s = new Destroyer(x,y,orient);
					break;
				case 1:
					s = new Submarine(x,y,orient);					
					break;
				case 2:
					s = new Battleship(x,y,orient);					
					break;
				}
				add = this.addShip(s);
				
			}  
		}
	}