为什么编译不过去?

[atq9]

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

/*
<applet code="SimpleKey" width=300 height=100>
</applet>
*/

public class Simple extends Applet implements KeyListener
{
String msg = "";
int X = 10,Y = 20;

public void init(){
addKeyListener(this);
requestFocus();
}

public void KeyPressed(KeyEvent ke){
showStatus("Key Down");
}

public void KeyReleased(KeyEvent ke){
showStatus("Key Up");
}

public void keyTyped(KeyEvent ke){
msg += ke.getKeyChar();
repaint();
}

public void paint(Graphics g){
g.drawString(msg,X,Y);
}
}



Simple.java:10: Simple is not abstract and does not override abstract method key
Released(java.awt.event.KeyEvent) in java.awt.event.KeyListener
public class Simple extends Applet implements KeyListener

[icebound1]

你的KeyListener中有一个Key的抽象方法
你在Simple中并没有实现它

[wlnet]

KeyListener 接口中还有一个key的方法没有定义

[tiger_wkh52741]

class Simple不是抽象类.因此要实现KeyListener所有方法才可以进行编译!

[binny]

public void KeyPressed(KeyEvent ke){

public void KeyReleased(KeyEvent ke){

方法名KeyPressed,KeyReleased中的Key改为key