https://github.com/albertprofe/cifojava2021-javase-1

Java SE exercises: Word Operations, to practise static methods and classes
https://github.com/albertprofe/cifojava2021-javase-1

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Java SE exercises: Word Operations, to practise static methods and classes

• Host: GitHub
• URL: https://github.com/albertprofe/cifojava2021-javase-1
• Owner: AlbertProfe
• Created: 2021-04-21T09:09:05.000Z (about 4 years ago)
• Default Branch: master
• Last Pushed: 2021-07-08T10:32:44.000Z (almost 4 years ago)
• Last Synced: 2025-01-20T15:19:01.538Z (4 months ago)
• Language: Java
• Homepage:
• Size: 84 KB
• Stars: 2
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# cifojava2021-javase-1

Java SE exercises: Word Operations, to practise static methods and classes

Welcome to the cifojava2021-javase-1 wiki!

### WordsOpertations

just few exercises of strings: class operations and editing (subString, indexOf, length, etc)

### WordsOpertations2

refactor WordsOperations to emailManagement

`public class AccountManagment {

	// scope #3

	// ----------------------------------------------

	// ---------  INICIO DEL TRABAJO ----------------

	// ----------------------------------------------

	public static void createAccount(String userToCreateAccount) {

		// scope #4

		String user = createUser(userToCreateAccount);

		String email = createEmail(userToCreateAccount);

		String password = createPassword();

		printUserAccount(user, email, password);

	}

	// ------------------------------------------------

	// ----------- HARRAMIENTAS ----------------------

	// ------------------------------------------------

	public static String createUser(String createUser) {

		// scope #5

		int blank = createUser.indexOf(" ");

		String user = createUser.substring(0, blank);

		return user;

	}

	public static String createEmail(String createEmail) {

		// scope #6

		int blank = createEmail.indexOf(" ");

		String surname = createEmail.substring(blank + 1, createEmail.length());

		String email = createEmail.charAt(0) + surname + "@java.com";

		return email;

	}

	public static String createPassword() {

		// scope #7

		String password = "";

		password = password + createCharRandom() + createIntRandom(10000) + createCharRandom() + createCharRandom()

				+ createIntRandom(596);

		return password;

	}

	public static void printUserAccount(String user, String email, String password) {

		// scope #8

		System.out.println("User Account: ");

		System.out.println("User : " + user);

		System.out.println("Email: " + email);

		System.out.println("Password: " + password);

	}

	// ------------------------------------------------

	// ----------- MAS HARRAMIENTAS -------------------

    // ------------------------------------------------

	public static int createIntRandom(int top) {

		// scope #9

		Random rand = new Random();

		// Generate random integers in range 0 to top, if top=10 random 0 to 9

		int intRandom = rand.nextInt(top);

		return intRandom;

	}

	public static char createCharRandom() {

		// scope #9

		// Random rand = new Random();

		// String alphabetChars =

		// "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";

		// String alphabetChars2 = "!·$%&/()=?¿?=)()/*-+^*Ǩ_:;;:_+/";

		String alphabetChars3 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz!·$%&/()=?¿?=)()/*-+^*Ǩ_:;;:_+/+/";

		// Generate random char in range 0 to top, if top=10 random 0 to 9

		char charRandom = alphabetChars3.charAt(createIntRandom(alphabetChars3.length()));

		return charRandom;

	}

}`

### WordsOpertations3

create serveral classes to order emailManagement functionality:

>  * AccountCreation.java 

>  * AccountDeleting.java (to-do)

>  * AccountManagment.java 

>  * AccountUpdating.java (to-do)

>  * Init.java

>  * Utils.java

just empty classes to implement, so to-do: AccountDeleting.java and AccountUpdating.java

### WordsOpertations4

we define our **init** as a kind of controller that tells us what to execute and most important, the order of execution (sync):

`public class Init {`

	`// scope #1`

	`public static void main(String[] args) {`

		`// scope #2

		Scanner reader = new Scanner(System.in);

		

		System.out.println("Type user (name and surname) to create Account ...");

		String userToCreateAccount = reader.nextLine();

		

		String account = AccountManagment.createAccount(userToCreateAccount);

		

		//System.out.println(account);

		

		String user = Utils.fromStringToUser (account);

		String password = Utils.fromStringToPassword (account);

		

		boolean  isValidated  =  Login.validateAccount (reader, user, password);

		

		if (isValidated) {

			

			//to-do

			//AccountUpdating

			//AccountDeleting

			

			isValidated = false;

		} 

		

		System.out.println("\nBye bye my friend...");

		reader.close();

	}`

	

`}`

and we add a new functionality so we need a new class: **login.java**

>  * AccountCreation.java

>  * AccountDeleting.java (to-do)

>  * AccountManagment.java

>  * AccountUpdating.java (to-do)

>  * Init.java

>  * Login.java (to-do)

>  * Utils.java

### WordsOpertations5

we implement login class and methods:

`String user = Utils.fromStringToUser (account);`

`String password = Utils.fromStringToPassword (account);`

`public static boolean validateAccount(Scanner reader, String user, String password) {

		//System.out.println(user);

		//System.out.println(password);

		int count = 1;

		String userConsole;

		String passwordConsole;

		System.out.println("\nLogin:");

		do {

			System.out.println("\nEnter Username : ");

			userConsole = reader.next();

			System.out.println("Enter Password : ");

			passwordConsole = reader.next();

			if (userConsole.equals(user) && passwordConsole.equals(password)) {

				System.out.println("Access Granted! Welcome!");

				return true;

			} else if (userConsole.equals(user)) {

				System.out.println("Invalid Password!");

			} else if (passwordConsole.equals(password)) {

				System.out.println("Invalid Username!");

			} else {

				System.out.println("Invalid Username & Password!");

			}

			

			System.out.println("Total attempts: " + count + "/3");

			count++;

			if (count == 4) System.out.println("Account blocked!");

			

		} while (count < 4);

		

		

		return false;

	}`

### WordsOpertations6

we implement update class

### WordsOpertations7

we implement delete class

### WordsOpertations8

we migrate from `String` **account** (toString with _user_, _email_ and _password_ strings)

to `ArrayList` **account** (arryList wiht four positions, 0, 1, 2 and 3 with _name&surname_, _user_, _email_, _password_)

we need to change some classes:

### WordsOpertations9

final writing, comments and create Controller class in order to clean Init class

`package wordsoperations;

import java.util.ArrayList;

import java.util.Scanner;

public class Init {

	// scope #1

	public static void main(String[] args) {

		Controller.AppStarting();

		System.out.println("\nBye bye my friend...");

	}

}`