Check if a object is a instance of a class (but not a instance of its subclass)

Question

For this example:

public class Foo{}

public class Bar extends Foo{}

....

void myMethod(Foo qux){
   if (checkInstance(qux,Foo.class)){
     ....
   }
}
         


        

Answer 1

I just tried following code, it seems like working fine

public class BaseClass {

    private String a;

    public boolean isInstanceOf(BaseClass base){
        if(base == null){
            return false;
        }
        else if(getClass() == base.getClass()){
            return true;
        }else{
            return false;
        }
    }

}



public class DervidClass extends BaseClass {


    public boolean isInstanceOf(DervidClass base) {
        if(base == null){
            return false;
        }
        else if(getClass() == base.getClass()){
            return true;
        }else{
            return false;
        }
    }


}

public class myTest {
public static void main(String[] args) throws ParseException {


        BaseClass base = new BaseClass();
        BaseClass base1 = new BaseClass();
        DervidClass derived = new DervidClass();

        BaseClass d1 = new DervidClass();

        System.out.println(base.isInstanceOf(d1));
        System.out.println(d1.isInstanceOf(d1));
        System.out.println((d1 instanceof BaseClass));


    }