java:java中一个最简单的事件练习,…

package com.xudeyu.frame;

import java.awt.BorderLayout;

import java.awt.EventQueue;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import javax.swing.JFrame;

import javax.swing.JTextArea;

import javax.swing.JTextField;

public class EditText {

public static void main(String[] args) {

EventQueue.invokeLater(new Runnable() {

public void run() {

EditTest test = new EditTest();

test.setDefaultCloseOperation(3);

test.setVisible(true);

}

});

}

}

class EditTest extends JFrame {

public EditTest() {

setTitle("EditText");

setSize(300, 400);

final JTextField tx = new JTextField("Test!");

tx.copy();

final JTextArea txarea = new JTextArea();

tx.addActionListener(new ActionListener() {

@Override

public void actionPerformed(ActionEvent e) {

txarea.setText(tx.getText());

}

});

add(tx, BorderLayout.NORTH);

add(txarea, BorderLayout.CENTER);

}

}