Java Basic Methods

1. Java Return Methods-------------

public class main {
public static void main (String[]arug){

    int Totalmember= ID(12,13);
    System.out.println(Totalmember);
    }
static int ID(int person1, int person2){   // Return type methods/ void can not be use return type
    return person1+person2;
    }
}

// returns an int value 5 -------------------
static int returnFive() {
  return 5;
}

// has a parameter -----------------------
static void sayHelloTo(String name) {
  System.out.println("Hello " + name);
}

// simply prints"Hello World!" --------------------
static void sayHello() {
  System.out.println("Hello World!");
}


2. Creating class and object ---------------
  public class Animal{
    void berk(){
    System.out.println("Woff Woff");
}}

class Dog{

    public static void main( String[]arug ){
     Animal dog = new Animal();
        dog.berk();
    }


}

3.Encapsulation -----------------------------
import java.util.Scanner;
public class Main
{
    public static void main(String[] args) {
        Scanner read = new Scanner(System.in);
        int a = read.nextInt();
         Pupil pupil =  new Pupil();
            pupil.setAge(a);
    }
}

class Pupil{
    private int age;

    //complete setter method
    public void  setAge(int a){

        if(a>6){
             this.age=a;
             System.out.println("Welcome");
        }else{
            System.out.println("Sorry");
        }
            }
     public int getAge(){
        return age;
    }
}

4.Inhertance -----------------------------
  //  Recall the protected access modifier, which makes the members visible only to the subclasses.
    //You can access the superclass from the subclass using the super keyword.


  5. Polymorphism -----------------------------

    class Animal {
    public void makeSound() {
        System.out.println("Grr...");
    }
}
class Cat extends Animal {
    public void makeSound() {
        System.out.println("Meow");
    }
}
class Dog extends Animal {
    public void makeSound() {
        System.out.println("Woof");
    }
}

class Program {
    public static void main(String args[ ]) {
        Animal a = new Dog();
        Animal b = new Cat();

        a.makeSound();
        b.makeSound();
    }
}