Java Swing GroupLayout 不包括预期的 3 个按钮。如何解决这个问题？

Question

我需要一些关于下面代码的帮助。我想要做的是扩大 TextArea(名为 preview)的大小以包括最后三个按钮:algo1、algo2 和algo3.

我已经多次尝试更改代码，但它仍然只显示一个按钮，即 algo1，而不是所有三个按钮。它与 BASELINE 或 LEADING 有关系吗？有人可以告诉我哪里出错了吗？谢谢。

import java.awt.*; 
import javax.swing.*; 

// Create a simple GUI window
public class win {

private static void createWindow() {

   //Create and set up the window. 
   JFrame frame = new JFrame("PDF Denoiser");
   frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 

   //My edit
   JPanel panel = new JPanel();
   GroupLayout layout = new GroupLayout(panel);
   panel.setLayout(layout);

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

   JLabel label1 = new JLabel("Image File");
   JLabel label2 = new JLabel("Destination");
   JLabel label3 = new JLabel("Preview");

   JTextField current = new JTextField();
   JTextField dest = new JTextField();
   JTextArea preview = new JTextArea();

   JButton choose1 = new JButton("Search1");
   JButton choose2 = new JButton("Search2");
   JButton algo1 = new JButton("MDWM");
   JButton algo2 = new JButton("BFMR");
   JButton algo3 = new JButton("Mine");

   //Horizontal arrangement
   layout.setHorizontalGroup(layout.createSequentialGroup()
        .addGroup(layout.createParallelGroup(GroupLayout.Alignment.LEADING)
            .addComponent(label1)
            .addComponent(label2)
            .addComponent(label3))
        .addGroup(layout.createParallelGroup(GroupLayout.Alignment.LEADING)
            .addComponent(current)
            .addComponent(dest)
            .addComponent(preview))
        .addGroup(layout.createParallelGroup(GroupLayout.Alignment.LEADING)
            .addComponent(choose1)
            .addComponent(choose2)
            .addComponent(algo1)
            .addComponent(algo2)
            .addComponent(algo3))
    );

    layout.linkSize(SwingConstants.HORIZONTAL, choose1, choose2, algo1, algo2, algo3);

    //Vertical arrangement
    layout.setVerticalGroup(layout.createSequentialGroup()
        .addGroup(layout.createParallelGroup(GroupLayout.Alignment.BASELINE)
            .addComponent(label1)
            .addComponent(current)
            .addComponent(choose1))
        .addGroup(layout.createParallelGroup(GroupLayout.Alignment.BASELINE)
            .addComponent(label2)
            .addComponent(dest)
            .addComponent(choose2))
        .addGroup(layout.createParallelGroup(GroupLayout.Alignment.LEADING)
            .addComponent(label3)
            .addComponent(preview)
                .addGroup(layout.createSequentialGroup()
                .addGroup(layout.createParallelGroup(GroupLayout.Alignment.BASELINE)
                    .addComponent(algo1)
                    .addComponent(algo2)
                    .addComponent(algo3))))
    );






   //Display the window. 
   frame.setLocationRelativeTo(null); 
   frame.add(panel);
   frame.pack();
   frame.setVisible(true); 
}

public static void main(String[] args) {

   createWindow();

}

}

Answer 1

I'm quite new to Java. How do I do the invokeLater wrap? Any examples? Thanks

run:
java.awt.Rectangle[x=208,y=12,width=82,height=26]
java.awt.Rectangle[x=208,y=12,width=82,height=26]
java.awt.Rectangle[x=208,y=76,width=82,height=26]
java.awt.Rectangle[x=208,y=76,width=82,height=26]
java.awt.Rectangle[x=208,y=76,width=82,height=26]

• 看到所有三个 JButton 在屏幕上都获得了相同的坐标

意义

System.out.println(algo1.getBounds());
System.out.println(algo2.getBounds());
System.out.println(algo3.getBounds());

返回

java.awt.Rectangle[x=208,y=76,width=82,height=26]
java.awt.Rectangle[x=208,y=76,width=82,height=26]
java.awt.Rectangle[x=208,y=76,width=82,height=26]

import java.awt.*;
import javax.swing.*;

// Create a simple GUI window
public class Win {

    private static void createWindow() {
        //Create and set up the window. 
        JFrame frame = new JFrame("PDF Denoiser");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        //My edit
        JPanel panel = new JPanel();
        GroupLayout layout = new GroupLayout(panel);
        panel.setLayout(layout);
        layout.setAutoCreateGaps(true);
        layout.setAutoCreateContainerGaps(true);
        JLabel label1 = new JLabel("Image File");
        JLabel label2 = new JLabel("Destination");
        JLabel label3 = new JLabel("Preview");
        JTextField current = new JTextField(10);
        JTextField dest = new JTextField(10);
        JTextArea preview = new JTextArea(5, 10);
        final JButton choose1 = new JButton("Search1");
        //choose1.setPreferredSize(new Dimension(80,20));
        final JButton choose2 = new JButton("Search2");
        //choose2.setPreferredSize(new Dimension(80,20));
        final JButton algo1 = new JButton("MDWM");
        final JButton algo2 = new JButton("BFMR");
        final JButton algo3 = new JButton("Mine");
        //Horizontal arrangement
        layout.setHorizontalGroup(layout.createSequentialGroup()
                .addGroup(layout.createParallelGroup(GroupLayout.Alignment.LEADING)
                .addComponent(label1)
                .addComponent(label2)
                .addComponent(label3))
                .addGroup(layout.createParallelGroup(GroupLayout.Alignment.LEADING)
                .addComponent(current)
                .addComponent(dest)
                .addComponent(preview))
                .addGroup(layout.createParallelGroup(GroupLayout.Alignment.LEADING)
                .addComponent(choose1)
                .addComponent(choose2)
                .addComponent(algo1)
                .addComponent(algo2)
                .addComponent(algo3)));
        layout.linkSize(SwingConstants.HORIZONTAL, choose1, choose2, algo1, algo2, algo3);
        //Vertical arrangement
        layout.setVerticalGroup(layout.createSequentialGroup()
                .addGroup(layout.createParallelGroup(GroupLayout.Alignment.BASELINE)
                .addComponent(label1)
                .addComponent(current)
                .addComponent(choose1))
                .addGroup(layout.createParallelGroup(GroupLayout.Alignment.BASELINE)
                .addComponent(label2)
                .addComponent(dest)
                .addComponent(choose2))
                .addGroup(layout.createParallelGroup(GroupLayout.Alignment.LEADING)
                .addComponent(label3)
                .addComponent(preview)
                .addGroup(layout.createSequentialGroup()
                .addGroup(layout.createParallelGroup(GroupLayout.Alignment.BASELINE)
                .addComponent(algo1)
                .addComponent(algo2)
                .addComponent(algo3)))));
        //Display the window. 
        frame.setLocationRelativeTo(null);
        frame.add(panel);
        frame.pack();
        frame.setVisible(true);
        EventQueue.invokeLater(new Runnable() {
            @Override
            public void run() {
                System.out.println(choose1.getBounds());
                System.out.println(choose1.getBounds());
                System.out.println(algo1.getBounds());
                System.out.println(algo2.getBounds());
                System.out.println(algo3.getBounds());
            }
        });
    }

    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {
            @Override
            public void run() {
                createWindow();
            }
        });
    }
}

• 故事结束