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abstract class Animal {
public abstract void eat();
public void method(Animal a) {
if (a instanceof Dog)
Dog d = (Dog) a;
}
}
class Dog extends Animal {
public void eat() {
System.out.println("狗啃骨头...");
}
public void kanJia() {
System.out.println("狗看家...");
}
}
class Cat extends Animal {
public void eat() {
System.out.println("猫吃鱼...");
}
public void catchMouse() {
System.out.println("猫捉老鼠...");
}
}
class DuoTai {
public static void main(String[] args) {
Animal a = new Dog();
a.method(a);
}
}