1.目录结构
2. 有一个接口类Fruit，里面有get方法，Apple 和 Banana实现其接口，并重写get方法
Client是程序主入口，通过FruitFactory得到Fruit子类对象
3.代码实现
Fruit,java
public interface Fruit {
public void get();
}
Apple.java
public class Apple implements Fruit{
@Override
public void get() {
// TODO Auto-generated method stub
System.out.println("得到苹果");
}
}
Banana.java
public class Banana implements Fruit{
@Override
public void get() {
// TODO Auto-generated method stub
System.out.println("得到香蕉");
}
}
FruitFactory.java
public class FruitFactory {
public static final int APPLE = 1;
public static final int BANANA = 2;
public static Fruit getFruit(int type) throws InstantiationException, IllegalAccessException{
switch (type) {
case APPLE:
return Apple.class.newInstance();
case BANANA:
return new Banana();;
default:
return null;
}
}
}
Client.java
public class Client {
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
Fruit apple;
try {
apple = FruitFactory.getFruit(FruitFactory.APPLE);
apple.get();
} catch (InstantiationException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalAccessException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}