Inheritance and Polymorphism - General Questions

A method in the subclass with the same signature as in the parent class is:

Java supports multiple inheritance of:

What is the output of the following program?

public class Main {
    public static void main(String[] args) {
        A a = new B();
        System.out.println(a.s());
    }
}
class A { static String s() { return "A"; } }
class B extends A { static String s() { return "B"; } }

What is the output of the following program?

class A { String hi() { return "A"; } }
class B extends A { String hi() { return super.hi() + "B"; } }
class Main { public static void main(String[] args) { System.out.println(new B().hi()); } }

Does Java support multiple inheritance of classes?