在Swing面板上安排摆动组件

Question

我是Swing的新手,但有点努力实现我想做的事情.我想构建一个如下所示的屏幕:

我不确定哪种布局最适合这种屏幕.我尝试使用BorderLayout但它永远不会出现.我得到了右下方的按钮,但中间的组件证明是非常具有挑战性的.我知道如何将组件添加到面板上,但我正在努力的区域是如何对齐它们.有时如果我在带有BORDERLAYOUT的面板上添加文本字段,它会占用我不想要的整个面板的整个空间.

我设法让它几乎使用AbsoluteLayout工作,但我怀疑这不是最好的选择,如果我希望屏幕流畅.

setBounds(100, 100, 775, 599);
getContentPane().setLayout(new BorderLayout());
contentPanel.setBackground(SystemColor.control);
contentPanel.setForeground(Color.RED);
contentPanel.setBorder(new EtchedBorder(EtchedBorder.LOWERED, null, null));
getContentPane().add(contentPanel, BorderLayout.CENTER);
contentPanel.setLayout(new BorderLayout(0, 0));
{
    JPanel topHeadersPanel = new JPanel();
    contentPanel.add(topHeadersPanel, BorderLayout.NORTH);
    topHeadersPanel.setLayout(new BorderLayout(0, 0));
    {
        JLabel lblSetSourceRecord = new JLabel("Source customer record:");
        lblSetSourceRecord.setFont(new Font("Tahoma", Font.BOLD, 12));
        topHeadersPanel.add(lblSetSourceRecord, BorderLayout.WEST);
    }
    {
        JLabel lblSetDestinationRecord = new JLabel("Destination customer record:");
        lblSetDestinationRecord.setFont(new Font("Tahoma", Font.BOLD, 12));
        topHeadersPanel.add(lblSetDestinationRecord, BorderLayout.EAST);
    }

    {
        JLabel lblSetDestinationRecord = new JLabel("Source customer:");
        lblSetDestinationRecord.setFont(new Font("Tahoma", Font.BOLD, 12));
        topHeadersPanel.add(lblSetDestinationRecord, BorderLayout.SOUTH);
    }
}
{
    JPanel buttonPane = new JPanel();
    buttonPane.setBorder(new EtchedBorder(EtchedBorder.LOWERED, null, null));
    buttonPane.setLayout(new FlowLayout(FlowLayout.CENTER));
    getContentPane().add(buttonPane, BorderLayout.SOUTH);
    {
        JPanel panel = new JPanel();
        buttonPane.add(panel);
    }
    {
        JButton okButton = new JButton("OK");
        okButton.setActionCommand("OK");
        buttonPane.add(okButton);
        getRootPane().setDefaultButton(okButton);
    }
    {
        JButton cancelButton = new JButton("Cancel");
        cancelButton.setActionCommand("Cancel");
        buttonPane.add(cancelButton);
    }

Answer 1

尝试将上半部分放在GridLayout1行和2列中,将其添加到BorderLayout中心和按钮中BorderLayout.BOTTOM.在上部,使用两个面板,一个用于左侧,一个用于右侧.

这里有一些代码来显示这个(我无法真正复制/粘贴你的例子):

public class MW extends JFrame {

    public static void main(String[] args) {
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                createAndShowUI();
            }
        });
    }

    private static void createAndShowUI() {
        MW x = new MW();

        JPanel mainPanel = new JPanel();
        mainPanel.setLayout(new GridLayout(1, 2));

        JPanel leftPanel = new JPanel();
        JLabel srcLabel = new JLabel("Source record:");
        leftPanel.add(srcLabel);
        JPanel rightPanel = new JPanel();
        JLabel dstLabel = new JLabel("Destination record:");
        rightPanel.add(dstLabel);

        mainPanel.add(leftPanel);
        mainPanel.add(rightPanel);

        JPanel buttonPanel = new JPanel();
        buttonPanel.setLayout(new FlowLayout(FlowLayout.CENTER));
        JButton okButton = new JButton("OK");
        buttonPanel.add(okButton);
        JButton cancelButton = new JButton("Cancel");
        buttonPanel.add(cancelButton);

        x.setSize(400, 400);
        x.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        x.add(mainPanel, BorderLayout.CENTER);
        x.add(buttonPanel, BorderLayout.PAGE_END);
        x.setLocationRelativeTo(null);
        x.setVisible(true);
    }
}