GroupLayout无法按预期运行

Question

我正在尝试创建一个扫雷类型的游戏，并在顶部的GridLayout周围设计了界面，在底部设计了一个JPanel。我在底部的信息面板上安排JComponents时遇到问题。我正在使用GroupLayout来安排信息面板中的项目。

下面是它应该如何显示的基本图：

以下是实际结果：

我不明白为什么最底层的JLabel（大的是playerXTurnIndicator标签）根本没有显示出来。当然，当它们被添加到没有文本的组时，它们会采用水平或垂直布局所指定区域的大小？

private void createComponents() {     
    playerOneNameLabel = new JLabel("Name : ");
    playerTwoNameLabel = new JLabel("Name : ");
    playerOneScoreLabel = new JLabel("Score : ");
    playerTwoScoreLabel = new JLabel("Score : ");

    playerOneNameDataLabel = new JLabel("");
    playerTwoNameDataLabel = new JLabel("");
    playerOneScoreDataLabel = new JLabel("0");
    playerTwoScoreDataLabel = new JLabel("0");

    playerOneTurnIndicatorLabel = new JLabel();
    playerOneTurnIndicatorLabel.setBackground(Color.GREEN);
    playerOneTurnIndicatorLabel.setPreferredSize(new Dimension(100, 20));

    playerTwoTurnIndicatorLabel = new JLabel();
    playerTwoTurnIndicatorLabel.setBackground(Color.RED);
    playerTwoTurnIndicatorLabel.setPreferredSize(new Dimension(100, 20));

    infoMinesRemainingLabel = new JLabel("Mines Remaining : ");
    infoMinesRemainingData = new JLabel("0");

    infoTileCoordLabel = new JLabel("Tile : ");
    infoTileCoordDataLabel = new JLabel("0, 0");

    playerOneBombButton = new JButton("Bomb");
    playerTwoBombButton = new JButton("Bomb");

    GroupLayout layout = new GroupLayout(this);

    layout.setAutoCreateContainerGaps(true);
    layout.setAutoCreateGaps(true);

    layout.setHorizontalGroup(
            layout.createSequentialGroup()
                .addGroup(
                    layout.createSequentialGroup()
                        .addGroup(
                            layout.createParallelGroup()
                                .addGroup(
                                    layout.createSequentialGroup()
                                        .addComponent(playerOneNameLabel)
                                        .addComponent(playerOneNameDataLabel))
                                .addGroup(
                                    layout.createSequentialGroup()
                                        .addComponent(playerOneScoreLabel)
                                        .addComponent(playerOneScoreDataLabel))
                                .addComponent(playerOneTurnIndicatorLabel))
                        .addComponent(playerOneBombButton))
                .addGap(10)
                .addGroup(
                    layout.createSequentialGroup()
                        .addGroup(
                            layout.createParallelGroup()
                                .addComponent(infoMinesRemainingLabel)
                                .addComponent(infoTileCoordLabel))
                        .addGroup(
                            layout.createParallelGroup()
                                .addComponent(infoMinesRemainingData)
                                .addComponent(infoTileCoordDataLabel)))
                .addGap(10)
                .addGroup(
                    layout.createSequentialGroup()
                        .addComponent(playerTwoBombButton)
                        .addGroup(
                            layout.createParallelGroup()
                                .addGroup(
                                    layout.createSequentialGroup()
                                        .addComponent(playerTwoNameLabel)
                                        .addComponent(playerTwoNameDataLabel))
                                .addGroup(
                                    layout.createSequentialGroup()
                                        .addComponent(playerTwoScoreLabel)
                                        .addComponent(playerTwoScoreDataLabel))
                                .addComponent(playerTwoTurnIndicatorLabel))));

    layout.setVerticalGroup(
            layout.createParallelGroup()
                .addGroup(
                    layout.createParallelGroup()
                        .addGroup(
                            layout.createSequentialGroup()
                                .addGroup(
                                    layout.createParallelGroup()
                                        .addComponent(playerOneNameLabel)
                                        .addComponent(playerOneNameDataLabel))
                                .addGroup(
                                    layout.createSequentialGroup()
                                        .addGroup(
                                            layout.createParallelGroup()
                                                .addComponent(playerOneScoreLabel)
                                                .addComponent(playerOneScoreDataLabel)))
                                .addComponent(playerOneTurnIndicatorLabel))
                        .addComponent(playerOneBombButton)
                    )
                .addGap(50)
                .addGroup(
                    layout.createSequentialGroup()
                        .addGroup(
                            layout.createParallelGroup()
                                .addComponent(infoMinesRemainingLabel)
                                .addComponent(infoMinesRemainingData))
                        .addGroup(
                            layout.createParallelGroup()
                                .addComponent(infoTileCoordLabel)
                                .addComponent(infoTileCoordDataLabel)))
                .addGap(50)
                .addGroup(
                    layout.createParallelGroup()
                        .addComponent(playerTwoBombButton)
                        .addGroup(
                            layout.createSequentialGroup()
                                .addGroup(
                                    layout.createParallelGroup()
                                        .addComponent(playerTwoNameLabel)
                                        .addComponent(playerTwoNameDataLabel))
                                .addGroup(
                                    layout.createParallelGroup()
                                        .addComponent(playerTwoScoreLabel)
                                        .addComponent(playerTwoScoreDataLabel))
                                .addComponent(playerTwoTurnIndicatorLabel))));

    this.setLayout(layout);
}

此致

杰米

Answer 1

显示JLabel（因此底部的可用空间），但没有颜色。请改用JPanels（背景仅适用于不透明组件，请参阅http://docs.oracle.com/javase/7/docs/api/javax/swing/JComponent.html#setBackground%28java.awt.Color%29）。