comparing object with class

Question

how to comparing object with class? without create instance of class.
for exemple:
class A {}
class B extends A {}
main() {
B b = new B();
A a = (A) b;
//how to check that a is an instance of B class
}

Answer 1

Java has instanceof operator that is supposed to do what you want.
See here https://www.geeksforgeeks.org/java-instanceof-and-its-applications/

Answer 2

👍👍👍

Answer 3

yeah thats right thanks a lot :)