有人吗？帮忙看看

[kenanxiaoxiaohai]

源程序：
import java.applet.*;
import java.awt.*;
import java.awt.event.*;
public class ImplementActionListener extends Applet implements ActionListener
{
TextField password = new TextField("我是密码");
Button btn = new Button("隐藏");
public void init()
{
add(password);
add(btn);
btn.addActionListener(this);
}
public void actionPerform(ActionEvent e)
{
password.setEchoChar('*');
password.selectAll();
}
}
========================
错误提示：
--------------------Configuration: j2sdk1.4.0 <Default>--------------------
E:\javaexerces\ImplementActionListener.java:4: ImplementActionListener should be declared abstract; it does not define actionPerformed(java.awt.event.ActionEvent) in ImplementActionListener
public class ImplementActionListener extends Applet implements ActionListener
^
1 error

Process completed.

[kenanxiaoxiaohai]

没人回，呜呜~~~~~~

[kenanxiaoxiaohai]

没有人吗？

[rcom10002]

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

public class ImplementActionListener extends Applet implements ActionListener {
TextField password = new TextField("我是密码");

Button btn = new Button("隐藏");

public void init() {
add(password);
add(btn);
btn.addActionListener(this);
}

public void actionPerform(ActionEvent e) {
password.setEchoChar('*');
password.selectAll();
}

/* (non-Javadoc)
* @see java.awt.event.ActionListener#actionPerformed(java.awt.event.ActionEvent)
*/
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub

}
}