Extends

Question

How can i use the (extends ) on this programm ?
I can‘t open two classes in the same time.
Thank you all

Answer 1

You can do it the normal way.
Like this example :
(And read Java lesson 43.1)

class Animal {
protected int legs;
public void eat() {
System.out.println("Animal eats");
}
}

class Dog extends Animal {
Dog() {
legs = 4;
}
}

class MyClass {
public static void main(String[ ] args) {
Dog d = new Dog();
d.eat();
}
}

Answer 2

Thank you very match

Answer 3

also two classes can be public in one file here
(it is not standard java feature)