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Pacman Questions in Java

For my university assignment, I have to make a network version of pacman. I thought that the best approach to this problem is to first create a local copy of pacman and then expand it for a network game.

I have to say that I am relatively new to developing the Java GUI and using such functions in java.

I started following the links above regarding developing a game in java and an example pacman game.

I decided to represent the maze as an int array with different values ​​meaning different things. However, when the drawing method is executed inside the main game loop, I redraw the entire maze using this method.

    for (int i : theGame.getMaze())
    {
        if (i == 4)
        {
            g.setColor(mazeWallColour);
            g.fillRect(curX, curY, cellSize, cellSize);
            curX += 25;
        }
        else
        {
            curX += cellSize;
        }

        index++;


        // Move to new row
        if (index == 25)
        {
            index = 0;
            curX = 10;
            curY += cellSize;
        }
    }

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ocean = sprites.getSprite("oceano.gif");
g.setPaint(new TexturePaint(ocean, new Rectangle(0,t,ocean.getWidth(),ocean.getHeight())));
g.fillRect(10, 10,getWidth() - 20,getHeight() - 110);

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