建立一个中国工人的子类，中间包括他特有的属性生肖，注意构造器的参数和父类顺序一致

 1 public class TestUSA extends TestEmployee {
 2     String xingzuo;
 3
 4
 5     public TestUSA() {
 6     }
 7
 8     public TestUSA(String name, int age, String sex,String xingzuo) {
 9         super(name, age, sex);
10         this.xingzuo=xingzuo;
11     }
12
13
14     @Override
15     public void show() {
16         System.out.println("姓名"+name);
17         System.out.println("年龄"+age);
18         System.out.println("性别"+sex);
19         System.out.println("星座"+xingzuo);
20
21     }
22
23
24 }

同理，建立美国工人的子类

 1 public class TestChina extends TestEmployee {
 2     String shengxiao;
 3
 4     public TestChina() {
 5     }
 6
 7     public TestChina(String name,int age,String sex,String shengxiao) {
 8         super(name,age,sex);
 9         this.shengxiao = shengxiao;
10     }
11
12     @Override
13     public void show() {
14         System.out.println("姓名"+name);
15         System.out.println("年龄"+age);
16         System.out.println("性别"+sex);
17         System.out.println("生肖"+shengxiao);
18     }
19
20 }

 建立工厂，这里的方法名为getA， 1 import java.util.Scanner，TestEmployee为返回值类型（引用类型：引用），getA为方法名。在输入特又属性时利用equals进行判断，同时创建对象
 2
 3 public class TestEmployeeFactory {
 4     public static TestEmployee getA(String str){
 5         Scanner input =new Scanner(System.in);
 6         System.out.println("请输入姓名");
 7         String name=input.next();
 8         System.out.println("请输入年龄");
 9         int age=input.nextInt();
10         System.out.println("请输入性别");
11         String sex=input.next();
12
13         TestEmployee emp=null;
14         if(str.equals("china")){
15             System.out.println("请输入生肖");
16             String shengxiao=input.next();
17             emp=new TestChina(name,age,sex,shengxiao);
18
19         }else if(str.equals("usa")){
20             System.out.println("请输入星座");
21             String xingzuo=input.next();
22             emp=new TestUSA(name,age,sex,xingzuo);
23         }
24         return emp;
25     }
26
27     public static void main(String[] args) {
28         TestEmployee emp1=getA("china");
29         emp1.show();
30
31     }
32 }