无法将可比对象与父子孙子继承

问题描述

给出以下代码：

的实现。 code>，并尝试添加自己的可比较的< Goalkeeper> ； 

In your code, Goalkeeper inherits from Player its implementation of Comparable <Player>, and tries to add a Comparable <Goalkeeper> of its own; this is not allowed.
解决此局限性的最简单方法是在可疑对象中覆盖 Comparable< Player>  守门员，将传入的玩家投射到守门员，并将其与此守门员。
The simplest way to address this limitation is to override Comparable <Player> in the Goalkeeper, cast the player passed in to Goalkeeper, and compare it to this goalkeeper.
 编辑 
public int compareTo (Player otherPlayer) {
    Goalkeeper otherGoalkeeper = (Goalkeeper)otherPlayer;
    Integer _missedGoals = new Integer(this.missedGoals);
    return _missedGoals.compareTo(otherGoalkeeper.getMissedGoals());
}
                        
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