这段java程序有一行错了，不知道为什么，急求答案啊！ btnn.addActionListener=new ActionListener(){ 这

显示全部楼层 · 2011-8-1 18:48:12

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class WelcomeTest {
public void main(String args[]){
WelcomeFrame frame=new WelcomeFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.show();
}
}
class WelcomeFrame extends JFrame{
public WelcomeFrame(){
setTitle("Welcome");
setSize(DEFAULT_WIDTH,DEFAULT_HEIGHT);
WelcomePanel panel=new WelcomePanel();
Container contentPane=getContentPane();
contentPane.add(panel);
setVisible(true);
}
public static final int DEFAULT_WIDTH=300;
public static final int DEFAULT_HEIGHT=200;
}
class WelcomePanel extends JPanel{
public WelcomePanel(){
JLabel prompt=new JLabel("shurumingzi:");
final JTextField input=new JTextField(10);
final JTextField output=new JTextField(25);
JButton btnn=new JButton("welcome");
add(prompt);
add(input);
add(output);
add(btnn);
btnn.addActionListener=new ActionListener(){
public void actionPerfomes(ActionEvent event){
String s=input.getText();
output.setText("hello"+s);

}
}
}

}

千问 · 2011-8-1 18:48:12

btnn.addActionListener=new ActionListener(){public void actionPerfomes(ActionEvent event){ //这里的方法名称拼写错了，应该是 public void actionPerformed String s=input.getText();output.setText("hello"+s);}...