的Java AWT/Swing的：問題的paintComponent定製的JPanel（S）

Question

好了，所以基本上，我到目前爲止有：

• 用於創建自定義的JFrame（ApplicationWindow）主類。
• 一個擴展JFrame並充當窗口的ApplicationWindow類。
• 一個擴展JPanel的MapDisplayPanel類，用於（使用GridLayout）顯示一個8x8格：
• 擴展JPanel的MapBlock類。
• MapBlocks都包含在一個類中包含遊戲數據，GameData.java

這一切似乎工作，但只有一個MapBlock繪製到屏幕上。

代碼：

Main.java

public class Main { 

public static void main(String[] args) { 
    final ApplicationWindow window = new ApplicationWindow(); 

    window.setVisible(true); 
} 
} 

ApplicationWindow.java

public class ApplicationWindow extends JFrame { 

public ApplicationWindow() 
{ 
    setTitle("Heroes!"); 
    setLocationRelativeTo(null); 
    setSize(800,600); 
// setLayout(new BorderLayout()); 

    JPanel map = new MapDisplayPanel(); 

    add(map);//, BorderLayout.CENTER); 
} 
} 

MapDisplayPanel.java

public class MapDisplayPanel extends JPanel{ 
GameData game = null; 

public MapDisplayPanel() 
{ 
    game = new GameData(); 
    setLayout(new GridLayout(game.getWidth(),game.getHeight())); 
    setBackground(Color.CYAN); 

    MapBlock[][] map = game.getMap(); 
    for(MapBlock[] aBlk : map) 
    { 
     for(MapBlock blk : aBlk) 
     { 
      if(blk != null){add(blk);} 
     } 
    } 
} 
} 

MapBlock.java

public class MapBlock extends JPanel{ 
private int xPos = -1, yPos = -1; 

//Constructors 
public MapBlock(int x, int y, int terrain) 
{ 
    this.xPos = x; 
    this.yPos = y; 
    this.terrain = terrain; 
    setPreferredSize(new Dimension(50,50)); 
} 

//Methods 
@Override 
public void paintComponent(Graphics g) 
{ 
    //setBackground(Color.GREEN); 
    super.paintComponent(g); 
    g.setColor(Color.GREEN); 
    g.fillRect(0, 0, this.getWidth(), this.getHeight()); 
    g.setColor(Color.MAGENTA); 
    g.fillRect(10, 10, this.getWidth() - 20, this.getHeight() - 20); 

    /*String out = Integer.toString(this.getX()) + Integer.toString(this.getY()); 
    System.out.println(out); THIS WAS FOR DEBUG*/ 
} 

//Accessors, mutators 
public int getTerrain() 
{return terrain;} 

public int getX() 
{return xPos;} 
public int getY() 
{return yPos;} 

}

最後，GameData.java

public class GameData{ 

//Members 
private MapBlock[][] map = null; 
private int mapWidth = 8; private int mapHeight = 8; 

//Constructors 
public GameData() 
{ 
    map = new MapBlock[mapWidth][mapHeight]; 
    for(int x = 0; x < mapWidth; x++) 
    { 
     for(int y = 0; y < mapHeight; y++) 
     { 
      map[x][y] = new MapBlock(x,y,1); 
     } 
    } 
} 

//Accessors, mutators 
public MapBlock[][] getMap() 
{return map;} 

public int getWidth() 
{return mapWidth;} 

public int getHeight() 
{return mapHeight;} 

} 

正如我所說的，問題是，只有左上角MapBlock對象被吸引到屏幕上。我已經測試了這個硬核，看起來所有的組件都被正確地添加了，並且至少爲每一個組件調用了paintComponent。這裏是我的輸出的照片：

http://imgur.com/vxGAIEL

請幫助！

Answer 1

你覆蓋在MapBlockgetX和getY正在使用由佈局管理器來定位組件

public int getX() { 
    return xPos; 
} 

public int getY() { 
    return yPos; 
} 

將其刪除或重命名方法的所有實例。