Java Swing 幽灵/双重组件？

Question

(编辑)此问题已解决 - 请参阅答案。

我遇到了一个我以前从未见过的 Java/Swing 和 Netbeans 的不幸问题。我在 Netbeans 中设计了一个基本的纸牌游戏形式，它看起来运行得很好。下图: /image/IcZ7F.png

请注意左下角的导航器 View ，它清楚地列出了底部面板中的所有组件。

当我实际运行游戏时，乍一看似乎还不错...... /image/SNKK8.png

...但是当您最大化窗口时，您突然会无缘无故地看到面板内容的副本。 /image/y0LhY.png

这种重叠不仅令人困惑，还会导致按钮事件指向错误的组件，从而使游戏完全无法玩。默认情况下，会显示正确的聊天文本区域，但是当您单击它来聚焦时，它会突然将空白文本区域也带到前面，从而有效地隐藏了聊天文本区域。

此问题也会影响顶部面板，其中有本应没有文本的 jLabels 虚拟重复项(如右侧所示)。

是什么原因导致此问题以及如何解决？我在导航器中找不到面板的重复项，清理和构建不起作用，甚至自动生成的代码也没有显示向窗口添加两个文本区域的提示。

非常感谢您的帮助!

(编辑)相关自动生成的 initComponents 代码如下。我从未接触过这段代码，因为它是由 Netbeans 自动生成的。

// Variables declaration - do not modify                     
private javax.swing.JLabel bC1;
private javax.swing.JLabel bC2;
private javax.swing.JLabel bC3;
private javax.swing.JLabel bC4;
private javax.swing.JLabel bC5;
private javax.swing.JLabel bC6;
private javax.swing.JLabel bC7;
private javax.swing.JSpinner betSpinner;
private javax.swing.JButton btnBet;
private javax.swing.JButton btnPass;
private javax.swing.JPanel gamePanel;
private javax.swing.JButton jButton1;
private javax.swing.JLabel jLabel1;
private javax.swing.JScrollPane jScrollPane1;
private javax.swing.JTextField jTextField1;
private javax.swing.JLabel lC1;
private javax.swing.JLabel lC2;
private javax.swing.JLabel lC3;
private javax.swing.JLabel lC4;
private javax.swing.JLabel lC5;
private javax.swing.JLabel lC6;
private javax.swing.JLabel lC7;
private javax.swing.JPanel playingField;
private javax.swing.JPanel plrBottom;
private javax.swing.JPanel plrLeft;
private javax.swing.JPanel plrRight;
private javax.swing.JPanel plrTop;
private javax.swing.JLabel rC1;
private javax.swing.JLabel rC2;
private javax.swing.JLabel rC3;
private javax.swing.JLabel rC4;
private javax.swing.JLabel rC5;
private javax.swing.JLabel rC6;
private javax.swing.JLabel rC7;
private javax.swing.JPanel statusPanel;
private javax.swing.JLabel tC1;
private javax.swing.JLabel tC2;
private javax.swing.JLabel tC3;
private javax.swing.JLabel tC4;
private javax.swing.JLabel tC5;
private javax.swing.JLabel tC6;
private javax.swing.JLabel tC7;
private javax.swing.JTextArea textAreaChat;
// End of variables declaration  

private void initComponents() {

    statusPanel = new javax.swing.JPanel();
    jScrollPane1 = new javax.swing.JScrollPane();
    textAreaChat = new javax.swing.JTextArea();
    jTextField1 = new javax.swing.JTextField();
    jButton1 = new javax.swing.JButton();
    jLabel1 = new javax.swing.JLabel();
    betSpinner = new javax.swing.JSpinner();
    btnBet = new javax.swing.JButton();
    btnPass = new javax.swing.JButton();
    gamePanel = new javax.swing.JPanel();
    plrRight = new javax.swing.JPanel();
    rC1 = new javax.swing.JLabel();
    rC2 = new javax.swing.JLabel();
    rC3 = new javax.swing.JLabel();
    rC4 = new javax.swing.JLabel();
    rC5 = new javax.swing.JLabel();
    rC6 = new javax.swing.JLabel();
    rC7 = new javax.swing.JLabel();
    plrBottom = new javax.swing.JPanel();
    bC1 = new javax.swing.JLabel();
    bC2 = new javax.swing.JLabel();
    bC3 = new javax.swing.JLabel();
    bC4 = new javax.swing.JLabel();
    bC5 = new javax.swing.JLabel();
    bC6 = new javax.swing.JLabel();
    bC7 = new javax.swing.JLabel();
    plrLeft = new javax.swing.JPanel();
    lC1 = new javax.swing.JLabel();
    lC2 = new javax.swing.JLabel();
    lC3 = new javax.swing.JLabel();
    lC4 = new javax.swing.JLabel();
    lC5 = new javax.swing.JLabel();
    lC6 = new javax.swing.JLabel();
    lC7 = new javax.swing.JLabel();
    plrTop = new javax.swing.JPanel();
    tC1 = new javax.swing.JLabel();
    tC2 = new javax.swing.JLabel();
    tC3 = new javax.swing.JLabel();
    tC4 = new javax.swing.JLabel();
    tC5 = new javax.swing.JLabel();
    tC6 = new javax.swing.JLabel();
    tC7 = new javax.swing.JLabel();
    playingField = new javax.swing.JPanel();

    setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

    statusPanel.setPreferredSize(new java.awt.Dimension(0, 180));

    textAreaChat.setEditable(false);
    textAreaChat.setColumns(20);
    textAreaChat.setRows(5);
    jScrollPane1.setViewportView(textAreaChat);

    jButton1.setText("Send");
    jButton1.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            jButton1ActionPerformed(evt);
        }
    });

    jLabel1.setText("Betting");

    btnBet.setText("Bet");
    btnBet.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            btnBetActionPerformed(evt);
        }
    });

    btnPass.setText("Pass");
    btnPass.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            btnPassActionPerformed(evt);
        }
    });

    javax.swing.GroupLayout statusPanelLayout = new javax.swing.GroupLayout(statusPanel);
    statusPanel.setLayout(statusPanelLayout);
    statusPanelLayout.setHorizontalGroup(
        statusPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGroup(statusPanelLayout.createSequentialGroup()
            .addContainerGap()
            .addGroup(statusPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                .addGroup(statusPanelLayout.createSequentialGroup()
                    .addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, 308, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                    .addComponent(jButton1, javax.swing.GroupLayout.PREFERRED_SIZE, 73, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
                .addGroup(statusPanelLayout.createSequentialGroup()
                    .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 389, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                    .addGroup(statusPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                        .addGroup(statusPanelLayout.createSequentialGroup()
                            .addComponent(jLabel1)
                            .addGap(0, 0, Short.MAX_VALUE))
                        .addGroup(statusPanelLayout.createSequentialGroup()
                            .addGroup(statusPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                                .addComponent(btnBet, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                                .addComponent(betSpinner, javax.swing.GroupLayout.Alignment.TRAILING)
                                .addComponent(btnPass, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
                            .addContainerGap())))))
    );
    statusPanelLayout.setVerticalGroup(
        statusPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGroup(statusPanelLayout.createSequentialGroup()
            .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
            .addGroup(statusPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                .addGroup(statusPanelLayout.createSequentialGroup()
                    .addComponent(jLabel1)
                    .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                    .addComponent(betSpinner, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                    .addComponent(btnBet)
                    .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                    .addComponent(btnPass))
                .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 115, javax.swing.GroupLayout.PREFERRED_SIZE))
            .addGap(18, 18, 18)
            .addGroup(statusPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                .addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addComponent(jButton1))
            .addGap(27, 27, 27))
    );

    getContentPane().add(statusPanel, java.awt.BorderLayout.PAGE_END);

    gamePanel.setLayout(new java.awt.BorderLayout());

    rC1.setText("jLabel1");
    rC1.setMaximumSize(new java.awt.Dimension(14, 34));
    rC1.setMinimumSize(new java.awt.Dimension(14, 34));
    rC1.setPreferredSize(new java.awt.Dimension(14, 34));

    rC2.setText("jLabel1");
    rC2.setMaximumSize(new java.awt.Dimension(14, 34));
    rC2.setMinimumSize(new java.awt.Dimension(14, 34));
    rC2.setPreferredSize(new java.awt.Dimension(14, 34));

    rC3.setText("jLabel1");
    rC3.setMaximumSize(new java.awt.Dimension(14, 34));
    rC3.setMinimumSize(new java.awt.Dimension(14, 34));
    rC3.setPreferredSize(new java.awt.Dimension(14, 34));

    rC4.setText("jLabel1");
    rC4.setMaximumSize(new java.awt.Dimension(14, 34));
    rC4.setMinimumSize(new java.awt.Dimension(14, 34));
    rC4.setPreferredSize(new java.awt.Dimension(14, 34));

    rC5.setText("jLabel1");
    rC5.setMaximumSize(new java.awt.Dimension(14, 34));
    rC5.setMinimumSize(new java.awt.Dimension(14, 34));
    rC5.setPreferredSize(new java.awt.Dimension(14, 34));

    rC6.setText("jLabel1");
    rC6.setMaximumSize(new java.awt.Dimension(14, 34));
    rC6.setMinimumSize(new java.awt.Dimension(14, 34));
    rC6.setPreferredSize(new java.awt.Dimension(14, 34));

    rC7.setText("jLabel1");
    rC7.setMaximumSize(new java.awt.Dimension(14, 34));
    rC7.setMinimumSize(new java.awt.Dimension(14, 34));
    rC7.setPreferredSize(new java.awt.Dimension(14, 34));

    javax.swing.GroupLayout plrRightLayout = new javax.swing.GroupLayout(plrRight);
    plrRight.setLayout(plrRightLayout);
    plrRightLayout.setHorizontalGroup(
        plrRightLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGroup(plrRightLayout.createSequentialGroup()
            .addGroup(plrRightLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                .addComponent(rC1, javax.swing.GroupLayout.PREFERRED_SIZE, 89, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addComponent(rC2, javax.swing.GroupLayout.PREFERRED_SIZE, 89, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addComponent(rC3, javax.swing.GroupLayout.PREFERRED_SIZE, 89, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addComponent(rC4, javax.swing.GroupLayout.PREFERRED_SIZE, 89, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addComponent(rC5, javax.swing.GroupLayout.PREFERRED_SIZE, 89, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addComponent(rC6, javax.swing.GroupLayout.PREFERRED_SIZE, 89, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addComponent(rC7, javax.swing.GroupLayout.PREFERRED_SIZE, 89, javax.swing.GroupLayout.PREFERRED_SIZE))
            .addContainerGap())
    );
    plrRightLayout.setVerticalGroup(
        plrRightLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGroup(plrRightLayout.createSequentialGroup()
            .addGap(5, 5, 5)
            .addComponent(rC1, javax.swing.GroupLayout.PREFERRED_SIZE, 55, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
            .addComponent(rC2, javax.swing.GroupLayout.PREFERRED_SIZE, 55, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
            .addComponent(rC3, javax.swing.GroupLayout.PREFERRED_SIZE, 55, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
            .addComponent(rC4, javax.swing.GroupLayout.PREFERRED_SIZE, 55, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
            .addComponent(rC5, javax.swing.GroupLayout.PREFERRED_SIZE, 55, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
            .addComponent(rC6, javax.swing.GroupLayout.PREFERRED_SIZE, 55, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
            .addComponent(rC7, javax.swing.GroupLayout.PREFERRED_SIZE, 55, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
    );

    gamePanel.add(plrRight, java.awt.BorderLayout.LINE_END);

    bC1.setText("jLabel1");

    bC2.setText("jLabel1");

    bC3.setText("jLabel1");

    bC4.setText("jLabel1");

    bC5.setText("jLabel1");

    bC6.setText("jLabel1");

    bC7.setText("jLabel1");

    javax.swing.GroupLayout plrBottomLayout = new javax.swing.GroupLayout(plrBottom);
    plrBottom.setLayout(plrBottomLayout);
    plrBottomLayout.setHorizontalGroup(
        plrBottomLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGroup(plrBottomLayout.createSequentialGroup()
            .addGap(36, 36, 36)
            .addComponent(bC1, javax.swing.GroupLayout.PREFERRED_SIZE, 55, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
            .addComponent(bC2, javax.swing.GroupLayout.PREFERRED_SIZE, 55, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
            .addComponent(bC3, javax.swing.GroupLayout.PREFERRED_SIZE, 55, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
            .addComponent(bC4, javax.swing.GroupLayout.PREFERRED_SIZE, 55, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
            .addComponent(bC5, javax.swing.GroupLayout.PREFERRED_SIZE, 55, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
            .addComponent(bC6, javax.swing.GroupLayout.PREFERRED_SIZE, 55, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
            .addComponent(bC7, javax.swing.GroupLayout.PREFERRED_SIZE, 55, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
    );
    plrBottomLayout.setVerticalGroup(
        plrBottomLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGroup(plrBottomLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
            .addComponent(bC1, javax.swing.GroupLayout.PREFERRED_SIZE, 89, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addComponent(bC2, javax.swing.GroupLayout.PREFERRED_SIZE, 89, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addComponent(bC3, javax.swing.GroupLayout.PREFERRED_SIZE, 89, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addComponent(bC4, javax.swing.GroupLayout.PREFERRED_SIZE, 89, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addComponent(bC5, javax.swing.GroupLayout.PREFERRED_SIZE, 89, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addComponent(bC6, javax.swing.GroupLayout.PREFERRED_SIZE, 89, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addComponent(bC7, javax.swing.GroupLayout.PREFERRED_SIZE, 89, javax.swing.GroupLayout.PREFERRED_SIZE))
    );

    gamePanel.add(plrBottom, java.awt.BorderLayout.PAGE_END);

    lC1.setText("jLabel1");
    lC1.setMaximumSize(new java.awt.Dimension(14, 34));
    lC1.setMinimumSize(new java.awt.Dimension(14, 34));
    lC1.setPreferredSize(new java.awt.Dimension(14, 34));

    lC2.setText("jLabel1");
    lC2.setMaximumSize(new java.awt.Dimension(14, 34));
    lC2.setMinimumSize(new java.awt.Dimension(14, 34));
    lC2.setPreferredSize(new java.awt.Dimension(14, 34));

    lC3.setText("jLabel1");
    lC3.setMaximumSize(new java.awt.Dimension(14, 34));
    lC3.setMinimumSize(new java.awt.Dimension(14, 34));
    lC3.setPreferredSize(new java.awt.Dimension(14, 34));

    lC4.setText("jLabel1");
    lC4.setMaximumSize(new java.awt.Dimension(14, 34));
    lC4.setMinimumSize(new java.awt.Dimension(14, 34));
    lC4.setPreferredSize(new java.awt.Dimension(14, 34));

    lC5.setText("jLabel1");
    lC5.setMaximumSize(new java.awt.Dimension(14, 34));
    lC5.setMinimumSize(new java.awt.Dimension(14, 34));
    lC5.setPreferredSize(new java.awt.Dimension(14, 34));

    lC6.setText("jLabel1");
    lC6.setMaximumSize(new java.awt.Dimension(14, 34));
    lC6.setMinimumSize(new java.awt.Dimension(14, 34));
    lC6.setPreferredSize(new java.awt.Dimension(14, 34));

    lC7.setText("jLabel1");
    lC7.setMaximumSize(new java.awt.Dimension(14, 34));
    lC7.setMinimumSize(new java.awt.Dimension(14, 34));
    lC7.setPreferredSize(new java.awt.Dimension(14, 34));

    javax.swing.GroupLayout plrLeftLayout = new javax.swing.GroupLayout(plrLeft);
    plrLeft.setLayout(plrLeftLayout);
    plrLeftLayout.setHorizontalGroup(
        plrLeftLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGroup(plrLeftLayout.createSequentialGroup()
            .addGroup(plrLeftLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                .addComponent(lC1, javax.swing.GroupLayout.PREFERRED_SIZE, 89, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addComponent(lC2, javax.swing.GroupLayout.PREFERRED_SIZE, 89, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addComponent(lC3, javax.swing.GroupLayout.PREFERRED_SIZE, 89, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addComponent(lC4, javax.swing.GroupLayout.PREFERRED_SIZE, 89, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addComponent(lC5, javax.swing.GroupLayout.PREFERRED_SIZE, 89, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addComponent(lC6, javax.swing.GroupLayout.PREFERRED_SIZE, 89, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addComponent(lC7, javax.swing.GroupLayout.PREFERRED_SIZE, 89, javax.swing.GroupLayout.PREFERRED_SIZE))
            .addContainerGap())
    );
    plrLeftLayout.setVerticalGroup(
        plrLeftLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGroup(plrLeftLayout.createSequentialGroup()
            .addGap(5, 5, 5)
            .addComponent(lC1, javax.swing.GroupLayout.PREFERRED_SIZE, 55, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
            .addComponent(lC2, javax.swing.GroupLayout.PREFERRED_SIZE, 55, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
            .addComponent(lC3, javax.swing.GroupLayout.PREFERRED_SIZE, 55, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
            .addComponent(lC4, javax.swing.GroupLayout.PREFERRED_SIZE, 55, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
            .addComponent(lC5, javax.swing.GroupLayout.PREFERRED_SIZE, 55, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
            .addComponent(lC6, javax.swing.GroupLayout.PREFERRED_SIZE, 55, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
            .addComponent(lC7, javax.swing.GroupLayout.PREFERRED_SIZE, 55, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
    );

    gamePanel.add(plrLeft, java.awt.BorderLayout.LINE_START);

    tC1.setText("jLabel1");

    tC2.setText("jLabel1");

    tC3.setText("jLabel1");

    tC4.setText("jLabel1");

    tC5.setText("jLabel1");

    tC6.setText("jLabel1");

    tC7.setText("jLabel1");

    javax.swing.GroupLayout plrTopLayout = new javax.swing.GroupLayout(plrTop);
    plrTop.setLayout(plrTopLayout);
    plrTopLayout.setHorizontalGroup(
        plrTopLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGroup(plrTopLayout.createSequentialGroup()
            .addGap(37, 37, 37)
            .addComponent(tC1, javax.swing.GroupLayout.PREFERRED_SIZE, 55, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
            .addComponent(tC2, javax.swing.GroupLayout.PREFERRED_SIZE, 55, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
            .addComponent(tC3, javax.swing.GroupLayout.PREFERRED_SIZE, 55, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
            .addComponent(tC4, javax.swing.GroupLayout.PREFERRED_SIZE, 55, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
            .addComponent(tC5, javax.swing.GroupLayout.PREFERRED_SIZE, 55, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
            .addComponent(tC6, javax.swing.GroupLayout.PREFERRED_SIZE, 55, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
            .addComponent(tC7, javax.swing.GroupLayout.PREFERRED_SIZE, 55, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
    );
    plrTopLayout.setVerticalGroup(
        plrTopLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGroup(plrTopLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
            .addComponent(tC1, javax.swing.GroupLayout.PREFERRED_SIZE, 89, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addComponent(tC2, javax.swing.GroupLayout.PREFERRED_SIZE, 89, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addComponent(tC3, javax.swing.GroupLayout.PREFERRED_SIZE, 89, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addComponent(tC4, javax.swing.GroupLayout.PREFERRED_SIZE, 89, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addComponent(tC5, javax.swing.GroupLayout.PREFERRED_SIZE, 89, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addComponent(tC6, javax.swing.GroupLayout.PREFERRED_SIZE, 89, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addComponent(tC7, javax.swing.GroupLayout.PREFERRED_SIZE, 89, javax.swing.GroupLayout.PREFERRED_SIZE))
    );

    gamePanel.add(plrTop, java.awt.BorderLayout.PAGE_START);

    javax.swing.GroupLayout playingFieldLayout = new javax.swing.GroupLayout(playingField);
    playingField.setLayout(playingFieldLayout);
    playingFieldLayout.setHorizontalGroup(
        playingFieldLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGap(0, 0, Short.MAX_VALUE)
    );
    playingFieldLayout.setVerticalGroup(
        playingFieldLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGap(0, 0, Short.MAX_VALUE)
    );

    gamePanel.add(playingField, java.awt.BorderLayout.CENTER);

    getContentPane().add(gamePanel, java.awt.BorderLayout.CENTER);

    pack();
}// </editor-fold>

Answer 1

我已找到并解决了该问题；在困惑的构造函数中，initComponents() 被调用了两次。我深感羞愧。