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Thread: java oop

  1. #1
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    Default java oop

    it have 3 classes.
    main class = run every thing
    player class = create player and create his moves
    level class = render map and player

    when i run this code below it render a map and two players.

    1st player in redering in main when can move. if user hit right or left key it moves fine. (its moves bc of a method player_class.player_move(). i am calling this method in main)

    but problem is in 2nd player which is redering in level class. it does render but it doesnt move bc player_move() method is not appliet on 2nd player.

    i want some way so player_move() method is applied on 2nd player. which will make him move too.

    /*** main.java ***/
    public class main exted JApplet implement ActionListener
    {
            player player_class = new player();
        level level_class = new level();
            ....
     
         //useing timer and this is a main game loop
          public void actionPerformed(ActionEvent e)
            {
              player_class.player_move() ; 
              repaint();
            }
     
            public void paint()
            {
                super.paint(g);
                player_class.paint(g);
                level_class.paint(g);
            }
    }

    /*** player.java/
    public class player
    {
        ....
     
       public void player_move()
       {
          //this method works fine
          //it just moves the box(which is my player) left if user hit left key. right if user hit right key
       }
     
        //my player which is just a box
         public void paint(Graphics g)
        {
            g.drawIRect(x, y, width, height); 
           }
    }

    /*** level.java ***/
    public class level 
    {
        private int level01[][] =            {  {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
                                    {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
                                    {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
                                    {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
                                    {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
                                    {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
                                    {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
                                    {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
                                    {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
                                    {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
                                    {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
                                    {0,1,0,0,0,0,0,0,0,0,0,2,0,0,0},
                                    {2,2,2,2,2,2,2,0,0,2,2,2,2,2,2} };
     
        int image_tile_size = 32;  //32 by 32 image
     
     
     
        public level()
        {
        }
     
     
        @Override
        public void paint(Graphics g)
        {
     
     
    //render map. 
    //draw green box where its '2'
    //draw player where its '1'
    //draw blue box for sky where its '0'
     
            for(int y = 0; y < level01.length; y++) //rows
            {
                for(int x = 0; x < level01[y].length; x++) //cols
                {
                    if(level01[y][x] == 0)
                    {
                        g.setColor(Color.blue);
                        g.fillRect(x*image_tile_size, y*image_tile_size, image_tile_size, image_tile_size); //bc image_title_size is the image size
                    }
                    if(level01[y][x] == 1)
                    {
                        //draw player where there is '1'
                        player player_class = new player(x*image_tile_size, y*image_tile_size);
                        player_class.paint(g);
                    }
                    if(level01[y][x] == 2)
                    {
                        g.setColor(Color.green);
                        g.fillRect(x*image_tile_size, y*image_tile_size, image_tile_size, image_tile_size);
                    }
                }
            }//end of main for loop
        }//end of paint method
    }//end of level class



    the problem is that player doesnt move. its bc player_move() method a applied in main method and not in level class. i want to appliy player_move method to player in level class.


  2. #2
    Super Moderator Norm's Avatar
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    Default Re: java oop

    How can the code be compiled and executed for testing to see the problem?

    To do the same thing to multiple objects, have a method that does the thing and pass it each object.
    If you don't understand my answer, don't ignore it, ask a question.

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