Comparing Class Types in Java

Question

I want to compare the class type in Java.

I thought I could do this:

class MyObject_1 {}
class MyObject_2 extends MyObject_1 {}

public boolean funct         


        

Answer 1

Try this:

MyObject obj = new MyObject();
if(obj instanceof MyObject){System.out.println("true");} //true

Because of inheritance this is valid for interfaces, too:

class Animal {}
class Dog extends Animal {}    

Dog obj = new Dog();
Animal animal = new Dog();
if(obj instanceof Animal){System.out.println("true");} //true
if(animal instanceof Animal){System.out.println("true");} //true
if(animal instanceof Dog){System.out.println("true");} //true

For further reading on instanceof: http://mindprod.com/jgloss/instanceof.html