// reflection/FamilyVsExactType.java

// (c)2021 MindView LLC: see Copyright.txt

// We make no guarantees that this code is fit for any purpose.

// Visit http://OnJava8.com for more book information.

// The difference between instanceof and class

// {java reflection.FamilyVsExactType}

package reflection;

class Base {}

class Derived extends Base {}

public class FamilyVsExactType {

static void test(Object x) {

System.out.println(

"Testing x of type " + x.getClass());

System.out.println(

"x instanceof Base " + (x instanceof Base));

System.out.println(

"x instanceof Derived " + (x instanceof Derived));

System.out.println(

"Base.isInstance(x) " + Base.class.isInstance(x));

System.out.println(

"Derived.isInstance(x) " +

Derived.class.isInstance(x));

System.out.println(

"x.getClass() == Base.class " +

(x.getClass() == Base.class));

System.out.println(

"x.getClass() == Derived.class " +

(x.getClass() == Derived.class));

System.out.println(

"x.getClass().equals(Base.class)) "+

(x.getClass().equals(Base.class)));

System.out.println(

"x.getClass().equals(Derived.class)) " +

(x.getClass().equals(Derived.class)));

}

public static void main(String[] args) {

test(new Base());

test(new Derived());

}

}

/* Output:

Testing x of type class reflection.Base

x instanceof Base true

x instanceof Derived false

Base.isInstance(x) true

Derived.isInstance(x) false

x.getClass() == Base.class true

x.getClass() == Derived.class false

x.getClass().equals(Base.class)) true

x.getClass().equals(Derived.class)) false

Testing x of type class reflection.Derived

x instanceof Base true

x instanceof Derived true

Base.isInstance(x) true

Derived.isInstance(x) true

x.getClass() == Base.class false

x.getClass() == Derived.class true

x.getClass().equals(Base.class)) false

x.getClass().equals(Derived.class)) true

*/