A simple login and verification approach by passing objects with abstraction

Create a package like this first:

Then in each class, write the following code.

A/N: Login.java is our main class and we run that to check the output of the package.

SOURCE CODE:

LogManager.java

public class LogManager {
    String un,pwd;//Stores Sent username and password
    public void tryLogin(String un, String pwd){
        this.un=un;
        this.pwd=pwd;
    }
    //Send value of password by object
    public String getEnteredUn(){
        return this.un;
    }
    public String getEnteredPwd(){
        return this.pwd;
    }
    //Allow password
    public void allowLogin(String user){
        System.out.println(user+", you are authorized to use this method.");
    }
}

Login.java

public class Login {   
    public static void main(String[] args) {
        Scanner sc_un = new Scanner(System.in);
        Scanner sc_pwd = new Scanner(System.in);
        LogManager lm = new LogManager();
        Validator valid = new Validator();
        System.out.println("Enter username:");
        String un = sc_un.nextLine();
        System.out.println("Enter password");
        String pwd = sc_pwd.nextLine();
        System.out.println("\nPerforming login verification....\n");
        lm.tryLogin(un,pwd);
        valid.verify(lm);
    } 
}

Validator.java

public class Validator {
    private final String un="siddhant", pwd="@admin";
    public void verify(LogManager lm){
        //Validator v = new Validator();
        if(Objects.equals(pwd, lm.getEnteredPwd()) &&
                Objects.equals(un, lm.getEnteredUn())){
            lm.allowLogin(this.un);
        }
        else
        {
            System.out.println("You've entered the wrong username or password."
                    + "\nPlease retry.");
        }
    }
}
/**
 * Tips learned while coding this Class:
 * 1. Never create an object of a class
 * if you wan to quickly implement it later
 * 2. Instead, use it inside a method or psvm
 * 3. Objects declared like this can be expected
 * to easily pass from one class to the next via
 * their underlying methods.
*/

---

OUTPUT:
When user enters the wrong password:

When user enters the correct password: