User.java

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package com.encap;


/*  How to achieve full encapsualated class:
    Data hiding - Making all the data members private
    Data validation -  Setter and getter to set and get the data

    Constructor
 */
public class User {
    private static int nextId = 2025001;
    private int id;
    private String firstName;
    private String lastName;
    private int age;
    private String userName;
    private String password;

    // Mutator Method / Setter Method
    public void setId(int id) {
        // private field = paramater    
        this.id = id;
        nextId++;

    }

    // Accessor Method // Getter Method
    public int getId() {
        return id;
    }

    public void setFirstName(String firstName) {
        this.firstName = firstName;
    }

    public String getFirstName() {
        return firstName;
    }

    public void setLastName(String lastName) {
        this.lastName = lastName;
    }

    public String getLastName() {
        return lastName;
    }

    public void setAge(int age) {
        this.age = age;
    }

    public int getAge() {
        return age;
    }
    public void setUserName(String userName){
        this.userName = userName;
    }
    
    public String getUserName(){
        return userName;
    }
    public void setPassword(String password){
        this.password = password;
    }

    public String getPassword() {
         return password;
    }
   
}

// syntax
// 2024001
// this -> immediately refer to the object
// conventional
// unconventional