Java 判断对象类型instanceof 【多态扩展】

instanceof

public class TestPolymorphism {
public void voice(){
System.out.println("动物叫声！");
}
}
class Cat extends TestPolymorphism{
public void voice(){
System.out.println("喵嗷污！");
}
public void run(){
System.out.println("奔跑吧毛崽子！");
}
}
class Dog extends TestPolymorphism{
public void voice(){
System.out.println("汪汪汪！");
}
}

分隔符--------------------------------------------------------------------------------------------------

public class TestPolymorphism01 {
public static void TestVoice(TestPolymorphism a){
a.voice();
if(a instanceof Cat){
((Cat) a).run();
}
}
public static void main(String[] args){
TestPolymorphism t1=new Cat();
// T1.voice();
TestVoice(t1);
// Cat t2=(Cat)t1;   //instanceof 
// t2.run();//instanceof
}
}

instanceof 判断对象类型