Java AWT FileDialog create

import java.awt.Button;
import java.awt.FileDialog;
import java.awt.FlowLayout;
import java.awt.TextField;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JFrame;

public class Main extends JFrame {
   FileDialog fd;//from  w  ww  . j av a2 s.  co  m
   TextField t = new TextField(20);

   Main() {
      setSize(300, 150);
      setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      setLayout(new FlowLayout());
      Button b = new Button("Select a file");
      add(b);
      add(t);
      b.addActionListener(new ActionListener() {
         public void actionPerformed(ActionEvent e) {
            fd.setVisible(true);
            t.setText(fd.getFile());
         }
      });
      setVisible(true);
      fd = new FileDialog(this);
   }

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