单击按钮即可显示文件选择器.爪哇秋千

Question

我有一个Java作业，我需要构建一个程序，用于在学生之间交换信息。我正在使用IntelliJ IDEA和一个名为JFormDesigner的插件来设计GUI。我想在单击按钮时显示文件选择器。我尝试了不同的实现，但没有一个有效。单击按钮时屏幕上不显示任何内容，我想知道是否有人可以帮助我找到解决方案。

这是按钮代码：

 ChooseButton1.addMouseListener(new MouseAdapter() {
            @Override
            public void mouseClicked(MouseEvent e) {
                ChooseButton1MouseClicked(e);
            }
        });

这是实现操作的方法：

private void ChooseButton1MouseClicked(MouseEvent e) {
    JFileChooser fileChooser = new JFileChooser();
    int returnValue = fileChooser.showOpenDialog(null);
    if (returnValue == JFileChooser.APPROVE_OPTION) 
    {
    File selectedFile = fileChooser.getSelectedFile();
    System.out.println(selectedFile.getName());
    }
}

以下是测试代码：

import java.awt.event.*;
import javax.swing.*;
import javax.swing.GroupLayout;
import java.io.*;
public class Test extends JPanel {
private JButton ChooseButton;
public Test() {
    initComponents();
}
private void ChooseButtonActionPerformed(ActionEvent e) {
    JFileChooser fileChooser = new JFileChooser();
    int returnValue = fileChooser.showOpenDialog(null);
    if (returnValue == JFileChooser.APPROVE_OPTION)
    {
        File selectedFile = fileChooser.getSelectedFile();
        System.out.println(selectedFile.getName());
    }
}
private void initComponents() {
    ChooseButton = new JButton();

    setBorder(new javax.swing.border.CompoundBorder(
                                                           new javax.swing.border.TitledBorder(new javax.swing.border.EmptyBorder(0, 0, 0, 0),
            "JFormDesigner Evaluation", javax.swing.border.TitledBorder.CENTER,
            javax.swing.border.TitledBorder.BOTTOM, new java.awt.Font("Dialog", java.awt.Font.BOLD, 12),
            java.awt.Color.red), getBorder())); addPropertyChangeListener(new java.beans.PropertyChangeListener(){public void propertyChange(java.beans.PropertyChangeEvent e) {
        if("border".equals(e.getPropertyName())) throw new RuntimeException();
    }
    });

    //---- ChooseButton ----
    ChooseButton.setText("Choose");
    ChooseButton.addActionListener(new ActionListener() {
        @Override
        public void actionPerformed(ActionEvent e) {
            ChooseButtonActionPerformed(e);
        }
    });
    GroupLayout layout = new GroupLayout(this);
    setLayout(layout);
    layout.setHorizontalGroup(
                                     layout.createParallelGroup()
            .addGroup(layout.createSequentialGroup()
                              .addGap(155, 155, 155)
                              .addComponent(ChooseButton)
                              .addContainerGap(175, Short.MAX_VALUE))
    );
    layout.setVerticalGroup(
                                   layout.createParallelGroup()
            .addGroup(layout.createSequentialGroup()
                .addGap(125, 125, 125)
                .addComponent(ChooseButton)
                .addContainerGap(143, Short.MAX_VALUE))
    );
}
 public void main(String[] args) {
    Runnable runnable = new Runnable() {
        @Override public void run() {
            new Test();
        }
};
    EventQueue.invokeLater(runnable);
}
}

Answer 1

选择其他侦听器

ChooseButton1.addActionListener(new ActionListener() {
    @Override
    public void actionPerformed(ActionEvent e) {
        ChooseButton1MouseClicked(e);
    }
});