WindowDemo

package com.tz.util;

import java.awt.Button;
import java.awt.Dialog;
import java.awt.FlowLayout;
import java.awt.Frame;
import java.awt.Label;
import java.awt.TextArea;
import java.awt.TextField;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.io.File;

public class MyWindowDemo {
 private Frame f;
 private TextField tf;
 private Button but;
 private TextArea ta;

 MyWindowDemo() {
 }

 public void init() {
  f = new Frame("my window");
  f.setBounds(200, 300, 500, 600);
  f.setLayout(new FlowLayout());
  tf = new TextField(30);
  but = new Button("跳转");
  ta = new TextArea(15, 40);
  f.add(tf);
  f.add(but);
  f.add(ta);
  myEvent();
  f.setVisible(true);
 }

 private void myEvent() {
  f.addWindowListener(new WindowAdapter() {
   @Override
   public void windowClosed(WindowEvent e) {
    super.windowClosed(e);
    System.exit(0);
   }
  });
  but.addActionListener(new ActionListener() {
   @Override
   public void actionPerformed(ActionEvent arg0) {
    String text = tf.getText();
    ta.setText(text);
    tf.setText(null);
    // 读取文件目录
    String dirPath = tf.getText();
    File dir = new File(dirPath);
    if (dir.exists() && dir.isDirectory()) {
     ta.setText(null);
     String[] names = dir.list();
     for (String name : names) {
      ta.append(name + "\r\n");
     }
    }else{
     Dialog dl=new Dialog(f,true);
     dl.setTitle("error");
     Label lb=new Label();
     lb.setVisible(true);
     dl.add(lb);
     lb.setText(dirPath+"路径错误");
     
    }
   }
  });

 }

 public static void main(String[] args) {
  // TODO Auto-generated method stub

 }

}