小编nsd*_*nsd的帖子

我有一个名为Hospital.java的界面

public interface Hospital {
    public void operate();
    public void doScan();
    public void doVaccination();
}

我有一个名为StreetHospital.java的抽象类

public abstract class StreetHospital implements Hospital{
    public void operate(){
        System.out.println("Street Hospital operate");
  }
}

现在我正在使用另一个类CommunityHospital.java来扩展StreetHospital.java

public class CommunityHospital extends StreetHospital{

    public void doScan(){
        System.out.println("CommunityHospital doScan");
    }
    public void doVaccination(){
        System.out.println("CommunityHospital doVaccination");
}
    public void operate(){
        System.out.println("CommunityHospital operate");
    }
}

我在MainHospital类中创建了CommunityHospital对象

public class MainHospital {

    public static void main(String[] args){
        CommunityHospital ch = new CommunityHospital();
        ch.operate();
        ch.doScan();
        ch.doVaccination();

    }
}

我得到这个输出:

CommunityHospital operate
CommunityHospital doScan …