[置顶] JFileChooser用法

 import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JTextField;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;

public class FileChooserTest extends JFrame {

 public FileChooserTest(){
  try {
   UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
  } catch (ClassNotFoundException e1) {
   // TODO Auto-generated catch block
   e1.printStackTrace();
  } catch (InstantiationException e1) {
   // TODO Auto-generated catch block
   e1.printStackTrace();
  } catch (IllegalAccessException e1) {
   // TODO Auto-generated catch block
   e1.printStackTrace();
  } catch (UnsupportedLookAndFeelException e1) {
   // TODO Auto-generated catch block
   e1.printStackTrace();
  }
   JButton bt=new JButton("打开");
     this.add(bt);
     final JTextField tf=new JTextField(20);
     this.add(tf);
     final JTextField tf2=new JTextField(20);
     this.add(tf2);
     bt.addActionListener(new ActionListener(){

    @Override
    public void actionPerformed(ActionEvent e) {
     // TODO Auto-generated method stub
     JFileChooser file=new JFileChooser();
     int val=file.showOpenDialog(FileChooserTest.this);
     if(val==file.APPROVE_OPTION)
     {
      tf.setText(file.getSelectedFile().getName());
      tf2.setText(file.getCurrentDirectory().toString()+file.getSelectedFile().getName());
     }
     else
     {
      tf.setText("你取消了");
      tf2.setText("");
     }
    }});
     this.setLayout(new FlowLayout());
      this.setVisible(true);
      this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      this.setBounds(100,100,200,200);
 }
 public static void main(String[] args) {
  // TODO Auto-generated method stub
  new FileChooserTest();
 }
}