为什么我的对象在 Swing UI 上重叠？

如何解决为什么我的对象在 Swing UI 上重叠？

我使用 gridbag 布局在 Java 中创建了一个 Swing UI。这是添加组件的代码；

c.fill = GridBagConstraints.HORIZONTAL;
        c.gridx = 0;
        c.gridy = 0;
        c.gridwidth=2;
        this.add(loggedInLabel,c);
       // c.fill = GridBagConstraints.HORIZONTAL;
        c.anchor =GridBagConstraints.WEST;
        c.gridx = 0;
        c.gridy = 1;
        this.add(inputCommand,c);
        c.fill = GridBagConstraints.HORIZONTAL;
        c.gridx = 0;
        c.gridy = 2;
        this.add(confirmCommandButton,c);
        c.fill = GridBagConstraints.HORIZONTAL;
        c.gridx = 0;
        c.gridy = 3;
        this.add(replyField,c);
     //   c.fill = GridBagConstraints.VERTICAL;
        c.anchor =GridBagConstraints.EAST;
        c.gridx = 1;
        c.gridy = 1;
        this.add(screens,c);
        c.fill = GridBagConstraints.HORIZONTAL;
        c.gridx=0;
        c.gridy=4;
        c.gridwidth=2;
        c.anchor = GridBagConstraints.soUTHWEST;
        c.weightx = 0.25;
        c.weighty = 0.25;
       this.add(scrollPane,c);

出于某种原因，屏幕对象 (JComboBox) 与输入命令对象 (JTextField) 重叠。有谁知道为什么？它们应该在不同的 x 坐标上

解决方法

分析你的代码，首先你将gridwidth设置为2，这意味着所有后续组件的x网格跨度都是2，包括inputCommand：

    c.fill = GridBagConstraints.HORIZONTAL;
    c.gridx = 0;
    c.gridy = 0;
    c.gridwidth=2; //Span 2 columns
    this.add(loggedInLabel,c);
    c.anchor =GridBagConstraints.WEST;
    c.gridx = 0;
    c.gridy = 1;
    this.add(inputCommand,c); //inputCommand is two columns wide,cells (0,1)-(1,1)
    .....
    c.anchor =GridBagConstraints.EAST;
    c.gridx = 1;
    c.gridy = 1;
    this.add(screens,c); //Screens is also two columns wide,starting from 1 so 
                            //it will partially overlap inputCommand on cell (1,1)
    ...

,

在将所有缺失的行添加到您的代码中后，我想出了以下 GUI。

我不得不对您其余代码的样子进行了很多猜测，我不知道这是否与您所做的相符。

我添加了一个 Insets 实例来分隔组件。

这是我使用的完整的可运行代码。

import java.awt.BorderLayout;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;

import javax.swing.BorderFactory;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextField;
import javax.swing.SwingUtilities;

public class GridBagLayoutExample implements Runnable {

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new GridBagLayoutExample());
    }

    @Override
    public void run() {
        JFrame frame = new JFrame("GirdBagLayout Example");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        
        frame.add(createMainPanel(),BorderLayout.CENTER);
        
        frame.pack();
        frame.setLocationByPlatform(true);
        frame.setVisible(true);
    }
    
    private JPanel createMainPanel() {
        JPanel panel = new JPanel(new GridBagLayout());
        panel.setBorder(BorderFactory.createEmptyBorder(5,5,5));
        
        GridBagConstraints c = new GridBagConstraints();
        
        c.insets = new Insets(5,5);
        c.fill = GridBagConstraints.HORIZONTAL;
        c.gridx = 0;
        c.gridy = 0;
        c.gridwidth = 2;
        JLabel loggedInLabel = new JLabel("Logged in");
        panel.add(loggedInLabel,c);
        // c.fill = GridBagConstraints.HORIZONTAL;
        c.anchor = GridBagConstraints.WEST;
        c.gridx = 0;
        c.gridy = 1;
        JTextField inputCommand = new JTextField(10);
        panel.add(inputCommand,c);
        c.fill = GridBagConstraints.HORIZONTAL;
        c.gridx = 0;
        c.gridy = 2;
        JButton confirmCommandButton = new JButton("Confirm Command");
        panel.add(confirmCommandButton,c);
        c.fill = GridBagConstraints.HORIZONTAL;
        c.gridx = 0;
        c.gridy = 3;
        JTextField replyField = new JTextField(10);
        panel.add(replyField,c);
        // c.fill = GridBagConstraints.VERTICAL;
        c.anchor = GridBagConstraints.EAST;
        c.gridx = 1;
        c.gridy = 1;
        JPanel screens = new JPanel();
        panel.add(screens,c);
        c.fill = GridBagConstraints.HORIZONTAL;
        c.gridx = 0;
        c.gridy = 4;
        c.gridwidth = 2;
        c.anchor = GridBagConstraints.SOUTHWEST;
        c.weightx = 0.25;
        c.weighty = 0.25;
        JScrollPane scrollPane = new JScrollPane();
        panel.add(scrollPane,c);
        
        return panel;
    }

}