implem不是抽象和在延伸的接口不覆盖抽象方法FinalScore（）

Question

程序1

interface java{ 
    public void setHomeTeam(String name); 
    public void setVisitingTeam(String name); 
} 

程序2

interface extension extends java { 
    public String HomeTeamScored(); 
    public String VisitingTeamScored(); 
    public String FinalScore(); 
} 

程序3

public class implem implements extension{ 
    private String Home; 
    private String Visit; 

    public String HomeTeamScored(){ 
     return Home; 
    } 

    public String VisitingTeamScored(){ 
     return Visit; 
    } 

    public void setHome(String Home){ 
     this.Home = Home; 
    } 

    public void setVisit(String Visit){ 
     this.Visit = Visit; 
    } 
} 

程序4

public class compilation{ 
    public static void main(String [] args){ 
     implem implement = new implem(); 

     implement.setHome("Nihon"); 
     implement.setVisit("Chuugoku"); 

     System.out.println(""+implement.HomeTeamScored()); 
     System.out.println(""+implement.VisitingTeamScored()); 
    } 
} 

这些都是我的延长接口程序，而且我得到的错误：

implem is not abstract and does not override abstract method FinalScore() in extension public class implem implements extension{ ^ 1 error

Process completed.

Answer 1

你可以找到一个Java的接口的定义[site]

它说

If your class claims to implement an interface, all methods defined by that interface must appear in its source code before the class will successfully compile

所以，你implem类必须实现从Java中所有接口的方法和它的子类扩展。

你implem类必须遵循该规则，以便它看起来像如下，

public class implem implements extension { 
    private String Home; 
    private String Visit; 

    @Override 
    public String HomeTeamScored() { 
     return Home; 
    } 

    @Override 
    public String VisitingTeamScored() { 
     return Visit; 
    } 

    @Override 
    public void setHomeTeam(String name) { 

    } 

    public void setHome(String Home) { 
     this.Home = Home; 
    } 

    public void setVisit(String Visit) { 
     this.Visit = Visit; 
    } 

    @Override 
    public void setVisitingTeam(String name) { 

    } 

    @Override 
    public String FinalScore() { 

     return null; 
    } 
} 

Answer 2

因为要实现“扩展”你需要实现所有的接口，你需要添加

Public String FinalScore(); 

方法

致你的课

Answer 3

你的非抽象类实现没有实现所有的接口方法。 Public String FinalScore()就是这样一种方法。