java Event小问题
package extend;
import java.awt.event.WindowAdapter;
import java.awt.*;
import java.awt.event.WindowEvent;
import java.awt.event.*;
public class EventManagerDemo {
public static void main(String args[]){
final Frame f=new Frame("Test");
Button b=new Button("Press ME");
b.addActionListener(new ButtonHandler());
f.setLayout(new FlowLayout());
f.add(b);
f.setSize(200,100);
f.addWindowListener(new WindowAdapter(){
public void WindowClosing(WindowEvent evt){
f.setVisible(true);
f.dispose();
System.exit(0);

}

});
f.setVisible(true);

}

}
class ButtonHandler implements ActionListener{
public void actionperformed(ActionEvent e){
System.out.print("已经捕获");
}
}
对于类ButtonHandler我已经重写了 接口的方法 还是报错 要我实现抽象方法 怎么办呢？

[解决办法]
你最后的 ButtonHandler的方法名称大小写有问题， actionperformed改成actionPerformed就OK

Java code

import java.awt.event.WindowAdapter;import java.awt.*;import java.awt.event.WindowEvent;import java.awt.event.*;public class EventManagerDemo {    public static void main(String args[]){        final Frame f=new Frame("Test");        Button b=new Button("Press ME");        b.addActionListener(new ButtonHandler());        f.setLayout(new FlowLayout());        f.add(b);        f.setSize(200,100);        f.addWindowListener(new WindowAdapter(){            public void WindowClosing(WindowEvent evt){                f.setVisible(true);                f.dispose();                System.exit(0);            }        });        f.setVisible(true);    }}class ButtonHandler     implements ActionListener{        public void actionPerformed(ActionEvent e){        System.out.print("已经捕获");    }}
[解决办法]
拼写错误

           public void WindowClosing(WindowEvent evt){

技巧：  
重写的方法加上 ＠Override