我知道這里有很多關于 JElements 沒有顯示的堆疊溢位問題，都是因為有人忘記在建構式的末尾添加一個 setVisible(true) 。但至少我相信我的問題是不同的。我目前正在為大學創建一個國際象棋游戲，為此我有

游戲課：這里都聚在一起
Piece 包中擴展 JButton 的抽象 Piece 類
以及每個 Piece（Rook、Bishop、...）的類，每個擴展 Piece 并位于 Pieces 包中

在我寫更多之前，這又是一個愚蠢的錯誤，這里的代碼：```java import javax.swing.*; 進口件。*；

匯入 java.awt.*；匯入 java.awt.event.ActionEvent；匯入 java.awt.event.ActionListener；

公共類游戲擴展 JFrame { 私有靜態最終 int 寬度 = 8; 私有靜態最終 int 高度 = 8；

private static Piece clicked;

private static Piece[][] fields = new Piece[width][height];

private JPanel main = new JPanel();

public static void init(JPanel g) {
    for (int y = 0; y < fields.length; y  ) {
        for (int x = 0;  x < fields[y].length; x  ) {

            if (y == 1) fields[y][x] = new Pawn(x, y, true); //2nd or 7th row is filled with pawns
            else if (y == 6) fields[y][x] = new Pawn(x, y, false);
            else {
                fields[y][x] = new Empty(x,y,true);
            }

            fields[y][x].addActionListener(e -> {
                var p = (Piece) e.getSource();
                System.out.println(p.getX()   p.getY());
            });

            g.add(fields[y][x]);
        }
    }
}

public Game() {
    main.setBackground(Color.blue.darker());
    main.setLayout(new GridLayout(8,8));
    this.setSize(800,800);

    init(main);
    this.add(main);

    this.setDefaultCloseOperation(EXIT_ON_CLOSE);
    this.setVisible(true);
}

public static void main(String[] args) {
    var g = new Game();
}

}

```java
package Pieces;

import javax.swing.*;

public abstract class Piece extends JButton {
    private int x;
    private int y;
    private final boolean isWhite;

    public Piece(int x, int y, boolean isWhite) {
        this.x = x;
        this.y = y;
        this.isWhite = isWhite;
    }

    public int getX() {
        return x;
    }

    public int getY() {
        return y;
    }

    public boolean isWhite() {
        return isWhite;
    }

    public boolean canMoveTo(int toX, int toY) {
        return true;
    }
}

每個 Piece 擴展類的設定完全如下：

package Pieces;

import java.awt.*;

public class Pawn extends Piece{
    public Pawn(int x, int y, boolean isWhite) {
        super(x, y, isWhite);
        this.setText(isWhite ? "Pawn" : "pawn");
    }
}

預期行為：

打開一個包含 64 個 JButton 的視窗，顯示它們所代表的 Piece 的名稱（確實有一個 Empty-class 用于未使用的欄位）

實際行為：

在左上角打開一個帶有一個按鈕的視窗，但首先當我用游標瀏覽欄位時，按鈕開始出現
狀態 1：[狀態 1][1]
狀態 2：[狀態 2][1]

uj5u.com熱心網友回復：

您不能覆寫getX并且getY像這樣，布局管理器使用這些屬性來布局組件。

相反，可能會利用Point來存盤虛擬或“單元格”位置

public static abstract class Piece extends JButton {
    private final boolean isWhite;
    private Point cell;

    public Piece(int x, int y, boolean isWhite) {
        cell = new Point(x, y);
        this.isWhite = isWhite;
    }

    public Point getCell() {
        return cell;
    }

    public boolean isWhite() {
        return isWhite;
    }

    public boolean canMoveTo(int toX, int toY) {
        return true;
    }
}

可運行的示例...

初始化后 JButtons 不顯示 [Java Swing]

import java.awt.Color;
import java.awt.EventQueue;
import javax.swing.JFrame;
import java.awt.GridLayout;
import java.awt.Point;
import javax.swing.JButton;
import javax.swing.JPanel;

public class Main {
    public static void main(String[] args) {
        new Main();
    }

    public Main() {
        EventQueue.invokeLater(new Runnable() {
            @Override
            public void run() {
                JFrame frame = new JFrame();
                frame.add(new BoardPane());
                frame.pack();
                frame.setLocationRelativeTo(null);
                frame.setVisible(true);
            }
        });
    }

    public class BoardPane extends JPanel {
        private static final int width = 8;
        private static final int height = 8;

        private Piece clicked;

        private Piece[][] fields = new Piece[width][height];

        public BoardPane() {
            setBackground(Color.blue.darker());
            setLayout(new GridLayout(8, 8));
            buildBoard();
        }

        protected void buildBoard() {
            for (int y = 0; y < fields.length; y  ) {
                for (int x = 0; x < fields[y].length; x  ) {

                    if (y == 1) {
                        fields[y][x] = new Pawn(x, y, true); //2nd or 7th row is filled with pawns
                    } else if (y == 6) {
                        fields[y][x] = new Pawn(x, y, false);
                    } else {
                        fields[y][x] = new Empty(x,y,true);
                    }

                    fields[y][x].addActionListener(e -> {
                        var p = (Piece) e.getSource();
                        System.out.println(p.getCell());
                    });

                    add(fields[y][x]);
                }
            }
        }
    }

    public static abstract class Piece extends JButton {
        private final boolean isWhite;
        private Point cell;

        public Piece(int x, int y, boolean isWhite) {
            cell = new Point(x, y);
            this.isWhite = isWhite;
        }

        public Point getCell() {
            return cell;
        }

        public boolean isWhite() {
            return isWhite;
        }

        public boolean canMoveTo(int toX, int toY) {
            return true;
        }
    }

    public static class Pawn extends Piece {
        public Pawn(int x, int y, boolean isWhite) {
            super(x, y, isWhite);
            this.setText(isWhite ? "Pawn" : "pawn");
        }
    }

    public static class Empty extends Piece {
        public Empty(int x, int y, boolean isWhite) {
            super(x, y, isWhite);
            this.setText("X");
        }
    }
}

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初始化后JButtons不顯示[JavaSwing]

可運行的示例...