1 //接口的应用：工厂方法的设计模式 2 public class TestFactoryMethod { 3     public static void main(String[] args) { 4         IWorkFactory i = new StudentWorkFactory(); 5         i.getWork().doWork(); 6          7         IWorkFactory i1 = new TeacherWorkFactory(); 8         i1.getWork().doWork(); 9     }10 }11 12 interface IWorkFactory{13     Work getWork();14 }15 class StudentWorkFactory implements IWorkFactory{16 17     @Override18     public Work getWork() {19         return new StudentWork();20     }21     22 }23 class TeacherWorkFactory implements IWorkFactory{24 25     @Override26     public Work getWork() {27         return new TeacherWork();28     }29     30 }31 32 interface Work{33     void doWork();34 }35 36 class StudentWork implements Work{37 38     @Override39     public void doWork() {40         System.out.println("学生写作业");41     }42     43 }44 class TeacherWork implements Work{45 46     @Override47     public void doWork() {48         System.out.println("老师批改作业");49     }50     51 }