public class Foo implements IObject{
}

public class Test extends Foo{
}

public class MultiStateTest {
        public static void main(String args[]){
                test();
        }

        public static void test(){
                IObject f=new Test();
                if(f instanceof java.lang.Object)System.out.println("true");
                if(f instanceof Foo)System.out.println("true");
                if(f instanceof Test)System.out.println("true");
                if(f instanceof IObject)System.out.println("true");
        }
}