为什么我的子JPanels会被移动或者放在父JPanel中？

Question

我有一个JFrame，有一个主GamePanel：

import javax.swing.*;

public class GameFrame extends JFrame {

    public static void main(String[] args) {

        JFrame gameFrame = new JFrame( "Ultimate Tic Tac Toe");

        gameFrame.setResizable(false);
        gameFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        gameFrame.add( new GamePanel() );
        gameFrame.pack();
        gameFrame.setVisible(true);

    }
}

GamePanel有一个BorderLayout，我有一个setPreferredSize(new Dimension(800,800))：

公共类GamePanel扩展JPanel实现ActionListener {

private BoardPanel boardPanel; //the main game, comprised of minigames
private static TrackingPanel trackingPanel; //keeps track of score, turn, and stuff
private ArrayList<MiniGame> miniGames;

public GamePanel() {

    super( new BorderLayout());
    setFocusable(true);
    setPreferredSize(new Dimension(800,800));

    //create panel that will hold the 9 mini games
    boardPanel = new BoardPanel(this); 

    //add actionListeners to each button
    miniGames = boardPanel.getMiniGames();
    for (MiniGame mini : miniGames) {
        for (SquareButton button : mini.getSquares())
            button.addActionListener(this);
    }

    add( trackingPanel, BorderLayout.NORTH);
    add( boardPanel, BorderLayout.CENTER);
}//end constructor

中心是my BoardPanel，它有一个GridLayout(3,3)，所以BoardPanel有9个子MiniGame JPanels。这里是我的问题：像下面这样添加MiniGames很好，但是由于某种原因，它们被推送到父BoardPanel和窗口之外显示。理想情况下，我希望在不改变布局的情况下这样做，因为我知道它们以前是工作过的。这是BoardPanel的代码。

import java.awt.*;
import java.util.ArrayList;
import javax.swing.JPanel;

public class BoardPanel extends JPanel {

private ArrayList<MiniGame> miniGames;

public BoardPanel(GamePanel gp) {
     super(new GridLayout(3,3));
             setBorder(BorderFactory.createEmptyBorder(200,200,200,200)); 

     miniGames = new ArrayList<MiniGame>(9);
     for(int i = 1; i<=9; i++)
         miniGames.add(new MiniGame(gp, i));

     for(MiniGame mini : miniGames)
         add(mini);
}

我知道所有的面板都是添加和显示(我检查通过改变他们的边框厚度。此外，增加空边框大小会显示更多的MiniGame面板)。因此，与其像网格一样显示：

 1 2 3 
 4 5 6
 7 8 9

它们呈对角线向下显示：

 1
   2
     3
      ...

其馀部分在父面板之外。

如果这有帮助的话，下面是MiniGame构造函数：

public MiniGame(GamePanel gp, int num) {

    super( new GridLayout(3,3));
    setFocusable(true);

    trackingPanel = gp.getTrackingPanel();
    panelNum = num;

    if(panelNum==1)
        setBorder(BorderFactory.createMatteBorder(0,0,2,2,Color.BLACK));
    else if(panelNum==2)
        setBorder(BorderFactory.createMatteBorder(0,2,2,2,Color.BLACK));
    else if(panelNum==3)
        setBorder(BorderFactory.createMatteBorder(0,2,2,0,Color.BLACK));
    else if(panelNum==4)
        setBorder(BorderFactory.createMatteBorder(2,0,2,2,Color.BLACK));
    else if(panelNum==5)
        setBorder(BorderFactory.createMatteBorder(2,2,2,2,Color.BLACK));
    else if(panelNum==6)
        setBorder(BorderFactory.createMatteBorder(2,2,2,0,Color.BLACK));
    else if(panelNum==7)
        setBorder(BorderFactory.createMatteBorder(2,0,0,2,Color.BLACK));
    else if(panelNum==8)
        setBorder(BorderFactory.createMatteBorder(2,2,0,2,Color.BLACK));
    else
        setBorder(BorderFactory.createMatteBorder(2,2,0,0,Color.BLACK));

    squares = new SquareButton[9];

    //create squares and add squares to mini game
    for ( int i = 0; i < squares.length; i++ ) {
        squares[i] = new SquareButton(i);
        add(squares[i]);
    }
     }

谢谢大家！

Answer 1

回溯工作时，我意识到这是我调用了getX()和getY()的两个函数。我猜这是JPanels的默认函数，我正在重写它们。

Answer 2

"MiniGame构造函数“显示调用{ add (squaresi);}，但没有显示add在MiniGame中的作用。因为您没有显示它的所有代码，所以我们不知道它扩展了什么。如果它本身是一个UI类，那么您的问题可能是在该容器中活动的布局管理器，不管它是什么。