call()和massege()报错是为什么？

package com.hehe;

public class CellPhone extends Telphone {

@Override

public void call(){

// TODO Auto-generated method stub

}

@Override

public void massege() {

// TODO Auto-generated method stub

}

}

package com.hehe;

public abstract class Telphone {

    public abstract void call();

    public abstract void massege();

}