Java For Android Tutorial #17: Oop concepts - Classes and Objects

Code:

package com.example;

public class java {

    public static void main(String[] str) {

        BioData johnBioData = new BioData("John Zeller","11 West Way Street",21,7462718);

        johnBioData.showEverything();

        BioData alisaBioData = new BioData("Alisa Johnson","11 North Street",23,4857283);

        alisaBioData.showEverything();

    }

}

class BioData{

    String name,address;

    int age,phone;

    public BioData(String pName,String pAddress,int pAge,int pPhone){

        name = pName;

        address = pAddress;

        age = pAge;

        phone = pPhone;

    }

    public void showEverything(){

        showName();

        showAddress();

        showAge();

        showPhone();

    }
    public void showName(){

        System.out.println("Person Name is: "+ name);

    }

    public void showAddress(){

        System.out.println("Person Address is: "+ address);

    }

    public void showAge(){

        System.out.println("Person Age is: "+ age);

    }

    public void showPhone(){

        System.out.println("Person Phone Number is: "+ phone);

    }

}

In this code, I have explained the important concept of classes and objects in java. For that, I implemented one program with the example of biodata. As strings variables, I have considered name and address. As integers variables, I have age and phone. In the program, there are 2 classes. One is the default class, which only have a main method. And other is the Biodata class that has 4 variables and 6 methods. 1 is the constructor, 4 methods are used to display the data and 1 method is used to call the previous 4 methods. I have made 2 objects with 2 different datasets.