填充JPanel上的JTextFields

Question

使用下面的代码，我用JTextFields和JLabels创建了一个JPanel，并将该面板添加到另一个JPanel中。如何调整信息面板上JTextFields之间的间距?

我已经尝试了GridLayout和GridLayout与不同的和不希望的结果。现在的方式至少可以让它们垂直对齐，但我似乎无法在它们的上方和下方添加空间。有这方面的专家能帮上忙吗?

public DrawPanelMain() {
    JPanel btnPanel = new JPanel(); //Creates a new Panel for the buttons
    JPanel infoPanel = new JPanel();
    JPanel fields = new JPanel();
    //Text boxes for infoPanel
    JTextField textField1 = new JTextField(20);
    JTextField textField2 = new JTextField(20);
    JTextField textField3 = new JTextField(20);
    JTextField textField4 = new JTextField(20);
    JTextField textField5 = new JTextField(20);
    JTextField textField6 = new JTextField(20);
    //JLabels for infoPanel
    JLabel jLabel1 = new JLabel("Serial Number: ");
    JLabel jLabel2 = new JLabel("Information: ");
    JLabel jLabel3 = new JLabel("Information: ");
    JLabel jLabel4 = new JLabel("Information: ");
    JLabel jLabel5 = new JLabel("Information: ");
    JLabel jLabel6 = new JLabel("Information: ");
    //These are the buttons that will  be added to the btnPanel
    btnPanel.add(new JButton(new AddSwitchAction("Add Switch Panel")));
    btnPanel.add(new JButton(new PushConfigAction("Push Config")));
    btnPanel.add(new JButton(new ActivateAllAction("Activate All")));
    btnPanel.add(new JButton(new DeactivateAllAction("Deactivate All")));
    //Fields that will be added to infoPanel
    fields.add(jLabel1);
    fields.add(textField1);
    fields.add(jLabel2);
    fields.add(textField2);
    fields.add(jLabel3);
    fields.add(textField3);
    fields.add(jLabel4);
    fields.add(textField4);
    fields.add(jLabel5);
    fields.add(textField5);
    fields.add(jLabel6);
    fields.add(textField6);
    //Sets border padding for the infoPanel
    fields.setBorder(new EmptyBorder(20, 20, 0, 20));
    //Draws border for the infoPanel
    infoPanel.setBorder(BorderFactory.createRaisedBevelBorder());
    //Sets layout for the fields panel
    fields.setLayout(new GridLayout(6, 1));
    //Add fields to infoPanel
    infoPanel.add(fields);
    //Add panels to tabbedPane
    setLayout(new BorderLayout());
    add(tabbedPane, BorderLayout.CENTER);
    add(btnPanel, BorderLayout.PAGE_END);
    add(infoPanel, BorderLayout.EAST);
}

Answer 1

创建复合边框

field.setBorder(BorderFactory.createCompoundBorder(
        field.getBorder(), 
        BorderFactory.createEmptyBorder(int top, int left, int bottom, int right)));

或者插入一些

field.setMargin(new java.awt.Insets(int top, int left, int bottom, int right));