跪求：java 如何在button点击后弹出目录路径选择对话框

Question

private JButton getJButton2() {
if (jButton2 == null) {
jButton2 = new JButton();
jButton2.setText("BROWSE");
//static JTextField TextField;
//static interf testFrame;
jButton2.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent e) {
System.out.println("actionPerformed()"); // TODO Auto-generated Event stub actionPerformed()
//static JTextField TextField;
//static interf testFrame;
JFileChooser chooser = new JFileChooser("./");
FileNameExtensionFilter filter = new FileNameExtensionFilter("");
chooser.setFileFilter(filter);
testFrame = new interf();
TextField = new JTextField("");
int returnVal = chooser.showOpenDialog(testFrame);
if(returnVal == JFileChooser.APPROVE_OPTION){
TextField.setText(chooser.getSelectedFile().getAbsolutePath());
}
}
}
);
Container contentPane = testFrame.getContentPane();
contentPane.setLayout(new FlowLayout());

}
return jButton2;
}
以上是我自己写的，那位高手帮忙看看了，运行不了。

Answer 1

    JFileChooser chooser = new JFileChooser();
// Note: source for ExampleFileFilter can be found in FileChooserDemo,
    // under the demo/jfc directory in the JDK.
    ExampleFileFilter filter = new ExampleFileFilter();
    filter.addExtension("jpg");
    filter.addExtension("gif");
    filter.setDescription("JPG & GIF Images");
    chooser.setFileFilter(filter);
    int returnVal = chooser.showOpenDialog(parent);
    if(returnVal == JFileChooser.APPROVE_OPTION) {
       System.out.println("You chose to open this file: " +
            chooser.getSelectedFile().getName());
    }

Answer 2

JFileChooser.DIALOG_TYPE_CHANGED_PROPERTY

Answer 3

import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;import javax.swing.JButton;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
public class MainFrame extends JFrame implements ActionListener { private JButton button;
private JFileChooser fileChooser;

public MainFrame() {
button = new JButton("浏览");
button.addActionListener(this);
fileChooser = new JFileChooser("./");

this.add(button,BorderLayout.NORTH);

this.setSize(800, 600);
this.setVisible(true);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}



public void actionPerformed(ActionEvent e) {
fileChooser.showOpenDialog(this);
}

public static void main(String[] args) {
new MainFrame();
}

}

Answer 4

JFileChooser.DIRECTORIES_ONLY 
          指示仅显示目录。

Answer 5

void   chooseButtonDirectory_actionPerformed(ActionEvent   e)   { 
                try   { 
                        JFileChooser   fileChooser   =   new   JFileChooser(); 
                        fileChooser.setFileSelectionMode(fileChooser.DIRECTORIES_ONLY); 
                        System.out.println( "here   is   directories ");                         int   n   =   fileChooser.showOpenDialog(this.getContentPane()); 
                        if   (n   ==   fileChooser.APPROVE_OPTION)   
                          {                                 textFieldFileLocalDirectory.setText(fileChooser.getSelectedFile().getPath()); 
                              
                        } 
                }   catch   (Exception   ex)   { 
                        ex.printStackTrace(); 
                }         }

Answer 6

JFileChooser jfc = new JFileChooser();
//System.out.println("choose done");
jfc.setFileSelectionMode(0);//设定只能选择到文件
int state = jfc.showOpenDialog(null);//此句是打开文件选择器界面的触发语句
if (state == 1) {
return;//撤销则返回
} else {
File f = jfc.getSelectedFile();//f为选择到的文件
jTextField1.setText(f.getAbsolutePath());
}