Java OOP

Feb 18, 2023

class Animal {}

class Dog3 extends Animal {
    static void method(Animal a) {
        if (a instanceof Dog3) {
            Dog3 d = (Dog3) a; //downcasting  
            System.out.println("ok downcasting performed");
        }
    }

    public static void main(String[] args) {
        Animal a = new Dog3();
        Dog3.method(a);
    }
}

The transient keyword in Java is used to indicate that a field should not be part of the serialization (which means saved, like to a file) process.

When the method signature (name and parameters) are the same in the superclass and the child class, it’s called overriding.

When two or more methods in the same class have the same name but different parameters, it’s called overloading.