Question

java编译ButtonEvent程序总是提示出错，代码如下

import java.awt. *;import java.awt.event.*;import java.awing.*;public class ButtonEvent extends JFrameimplements ActionListener{JButton button =new JButton("click me");JTextArea textArea = new JTextArea(2,20);Container c;int ClickCount=0;public ButtonEvent(){super("ButtonEvent.java;按钮事件测试");c=getContentPane();c.setLayout(new FlowLayout());c.add(button);c.add(textArea);setSize(300,120);show();button.addActionListener(this);}public void actionPerformed(ActionEvent e){ClickCount++;textArea.setText("您按click me" +clickCount+ "次");
public static void main(String[] args) { ButtonEvent app = new ButtonEvent(); app.addWindowListener(new MyWindowListener()); }}}

Answer 1

是不是这种效果

import java.awt. *;
import java.awt.event.*;

import javax.swing.*;

public class ButtonEvent extends JFrame implements ActionListener{
JButton button =new JButton("click me");
JTextArea textArea = new JTextArea(2,20);
Container c;
int clickCount=0;
public ButtonEvent(){
super("ButtonEvent.java;按钮事件测试");
c=getContentPane();
c.setLayout(new FlowLayout());
c.add(button);
c.add(textArea);
setSize(300,120);
show();
button.addActionListener(this);
}
public void actionPerformed(ActionEvent e){
clickCount++;
textArea.setText("您按click me" +clickCount+ "次");
}
public static void main(String[] args) {
ButtonEvent app = new ButtonEvent();
//app.addWindowListener(new MyWindowListener());
}
}

追问

大哥，我照你的拷贝了提示，方法声明无效，需要返回类型，怎么办

追答

我都要叫你大哥了！ 你把类名改成ButtonEvent1了，也不知道把构造也改下~
当然报错了！

Answer 2

public void actionPerformed(ActionEvent e)
{ //要加if 吧
ClickCount++;
textArea.setText("您按click me" +clickCount+ "次"); ///这里的括号呢？
public static void main(String[] args)
{
ButtonEvent app = new ButtonEvent();
app.addWindowListener(new MyWindowListener());
}
}
}

Answer 3

出现了很多错误耶.....导入的包名写错了，大小写写错了。花括号括错了......还有，监听器类你没有写。