java4-3中的抽象类
package com.imooc;
public class Cellphone extends Telphone {
@Override
public void call() {
// TODO Auto-generated method stub
}
@Override
public void message() {
// TODO Auto-generated method stub
}
}在cell和message下划红线，提示（Multiple markers at this line
- implements com.imooc.Telphone.message
- The method message() of type Cellphone must override or implement a supertype ）
