Jpanel 尺寸不正确

Question

所以我正在尝试使用 swing、JFrame 和 JPanel 制作一个类似 Pacman 的游戏，尺寸为 256x256；然而，当我实际编译游戏时，屏幕有点大。我不知道是因为没有正确覆盖方法还是可能是布局问题。

这是我的 JFrame class，它添加了一个 JPanel

*请注意，我已经注释掉了一些内容，因为我想弄清楚它们是否有帮助。

public class GameDevelopment extends JFrame{

//Window Stuff ... hopefully
public static final int DimensionHeight = 256;
public static final int DimensionWidth = 256;

// Level stuff possibly     
Tile startingTile;

Player player;
Walls walls;
public static Tile[][] tiles;

public GameDevelopment(){
    //Initialize           
    tiles = new Tile[DimensionWidth/16 ][DimensionHeight/16];
    for(int i = 0; i < DimensionWidth/16; i++){
        for(int y = 0; y < DimensionHeight/16; y++){
            tiles[i][y] = new Tile(i, y);
        }
    }

    startingTile = tiles[tiles.length/2][tiles[0].length/2];
    //xStart = (tiles.length/2) * 16;
    //yStart = (tiles[0].length/2) * 16;
    walls = new Walls();
    player = new Player(startingTile);


    //Sceen stuff       
    setTitle("Game");                        
    addKeyListener(player);
    addMouseListener(player);
    add(new Draw(walls, player), BorderLayout.CENTER);
    //setSize(DimensionWidth, DimensionHeight);
    pack();

    setLocationRelativeTo(null);
    setResizable(false);
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    setVisible(true);
}

public static void main(String[] args){
    SpriteSheet.getSprites();
    //Create tiles
    GameDevelopment game = new GameDevelopment();
}

我知道如果您添加一个组件并调用 pack() 它会将 jframe 设置为组件大小，所以我不确定是什么问题。

这是我绘制屏幕的 Jpanel class。我还手动在矩形中绘制了屏幕应该是什么样子，屏幕显然比它应该是的要大。

*注意我传入了各种具有绘制方法的 classes 并使用单个 paintComponent 从这个 class 调用这些方法，它可能没有很好地优化但不应该是问题所在。

public class Draw extends JPanel{

//Size
int DimensionHeight;
int DimensionWidth;

// Components
ArrayList components;
int amount;

public Draw(DrawGraphics ... _components){
    //Size
    DimensionWidth = GameDevelopment.DimensionWidth;
    DimensionHeight = GameDevelopment.DimensionHeight;
    //this.setPreferredSize(new Dimension(256, 256));
    //setMinimumSize(new Dimension(DimensionWidth, DimensionHeight));
    //setMaximumSize(new Dimension(DimensionWidth, DimensionHeight));
    //setSize(DimensionWidth, DimensionHeight);
    setBackground(new Color(80, 0, 255));
    System.out.println(getMinimumSize());

    //Components
    components = new ArrayList();
    components.addAll(Arrays.asList(_components));
    amount = components.size();
}

@Override
public Dimension getPreferredSize(){
    return new Dimension(DimensionWidth, DimensionHeight);
}

@Override
public void paintComponent(Graphics g){
    super.paintComponent(g);
    for(int i = 0; i < 16; i++){
        for(int y = 0; y < 16; y++){
            g.drawRect(i*16, y*16, 16, 16);
        }
    }
    for(int i = 0; i < amount; i++){
        ((DrawGraphics)components.get(i)).draw(g);
    }
    //g.drawRect(0, 0, 16, 16);
    repaint();
}

结果我得到了这张照片，它在绘制的矩形后显示一些蓝色 space：

感谢您的帮助！

Answer 1

不要在绘画方法中调用 repaint()。这将导致无限循环。

It shows some blue space after the drawn rectangles:

    setResizable(false);
    pack();
    setLocationRelativeTo(null);
//    setResizable(false);

在打包框架之前，您需要使框架不可调整大小。

Jpanel 尺寸不正确

Jpanel size not correct

java

swing

jpanel