java文本输入测试

package h04;

import java.awt.BorderLayout;

import java.awt.Frame;

import java.awt.TextField;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.awt.event.WindowAdapter;

import java.awt.event.WindowEvent;

public class TestTextField{

 public static void main(String[] args){

  TFFrame1 f=new TFFrame1();

  f.addWindowListener(new closeFrame2());

 }

}

@SuppressWarnings("serial")

class TFFrame1 extends Frame{

 TFFrame1(){

  TextField tf=new TextField();

  setLayout(new BorderLayout());

  add(tf,"North");

  tf.addActionListener(new tflistener());

  setSize(400,400);

  setLocation(300,300);

  setVisible(true);

 }

}

class tflistener implements ActionListener{

 public void actionPerformed(ActionEvent e) {

  TextField tf=(TextField)e.getSource();

  System.out.println(tf.getText());

  tf.setText("");//输入后文本中为空

  // TODO Auto-generated method stub

  

 }

 

}

class closeFrame2 extends WindowAdapter{

 public void windowClosing(WindowEvent e){

  System.exit(1);

 }

}