Java Source Code Example Project

Java is one of the most commonly used programming languages in the world, and it is particularly prevalent in mobile applications. However, it is also commonly found in everything from desktop applications, web servers and application servers, games, and database connections.

Java has a long history and several advantages. If you're looking to become a Java developer, you'll need to actually start coding, like every other programming language. Here, we list the 10 best Java projects for beginners in 2022.

What is Java?

Developed and created by John Gosling in1995 in Sun Microsystems, Java is a general-purpose, object-oriented programming language. It was developed and intended to follow the WORA concept which means Write Once Run Anywhere i.e. compiled Java code can run on all platforms that support Java without the need for recompilation.

It is popular among developers because of its following characteristics:

• Object-Oriented
• Portable
• Platform independent
• Secured
• Robust
• Architecture neutral
• Interpreted
• High Performance
• Multithreaded
• Distributed
• Dynamic

Learn more about Java here.

Java IDEs to Start Building Projects

There are plenty of Java IDEs and online editors for you to begin developing Java projects. The following list covers some of the most popular editors and IDEs.

IDEs:

• MyEclipse
• IntelliJ IDEA
• NetBeans
• Dr. Java
• Blue J
• JDeveloper

Online Editors:

• Codiva
• JDoodle
• Rextester
• Online GDB
• Browxy
• IDE One

For detailed information about IDEs and editors, you may want to read Java IDEs.

Best Java Projects for Beginners

The following are simple Java projects for beginners, and should do a good job of covering all the essential fundamental concepts of Java.

In some instances, the code is too long to include the source code in text, so we've provided links instead.

1. Smart City Project

This Smart City project tells individuals visiting the city about hotels, transportation facilities, air ticket booking, shopping details, city news, etc. It is a web-based software developed in Java Programming language that solves most of the problems that any new visitor faces when coming to a new city like pathfinding, hotel searching, and ticket booking, among other things.

Source Code

2. Currency Converter

This currency converter is a mini-Java project that provides a web-based interface for exchanging/converting money from one currency to another. It is developed using Ajax, Java servlets web features. Such applications have been used in the business industry.

          /*  * To change this template, choose Tools | Templates  * and open the template in the editor.  */  package com.exchange;  import java.io.*;  import java.net.*;  import java.util.*;  import javax.servlet.*;  import javax.servlet.http.*;  import java.io.InputStream;  import java.net.*;  import com.google.gson.*;  /**  *  * @author pakallis  */  classRecv  {  private String lhs;  private String rhs;  private String error;  private String icc;  public Recv(  {  }  public String getLhs()  {  return lhs;  }  public String getRhs()  {  return rhs;  }  }  public classConvertextendsHttpServlet {  /**  * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.  * @param request servlet request  * @param response servlet response  * @throws ServletException if a servlet-specific error occurs  * @throws IOException if an I/O error occurs  */  protected void processRequest(HttpServletRequest req, HttpServletResponse resp)  throws ServletException, IOException {  String query = "";  String amount = "";  String curTo = "";  String curFrom = "";  String submit = "";  String res = "";  HttpSession session;  resp.setContentType("text/html;charset=UTF-8");  PrintWriter out = resp.getWriter();  /*Read request parameters*/  amount = req.getParameter("amount");  curTo = req.getParameter("to");  curFrom = req.getParameter("from");  /*Open a connection to google and read the result*/  try {  query = "http://www.google.com/ig/calculator?hl=en&q=" + amount + curFrom + "=?" + curTo;  URL url = new URL(query);  InputStreamReader stream = new InputStreamReader(url.openStream());  BufferedReader in = new BufferedReader(stream);  String str = "";  String temp = "";  while ((temp = in.readLine()) != null) {  str = str + temp;  }  /*Parse the result which is in json format*/  Gson gson = new Gson();  Recv st = gson.fromJson(str, Recv.class);  String rhs = st.getRhs();  rhs = rhs.replaceAll("�", "");  /*we do the check in order to print the additional word(millions,billions etc)*/  StringTokenizer strto = new StringTokenizer(rhs);  String nextToken;  out.write(strto.nextToken());  nextToken = strto.nextToken();  if( nextToken.equals("million") || nextToken.equals("billion") || nextToken.equals("trillion"))  {  out.println(" "+nextToken);  }  } catch (NumberFormatException e) {  out.println("The given amount is not a valid number");  }  }  // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">  /**  * Handles the HTTP <code>GET</code> method.  * @param request servlet request  * @param response servlet response  * @throws ServletException if a servlet-specific error occurs  * @throws IOException if an I/O error occurs  */  @Override  protected void doGet(HttpServletRequest request, HttpServletResponse response)  throws ServletException, IOException {  processRequest(request, response);  }  /**  * Handles the HTTP <code>POST</code> method.  * @param request servlet request  * @param response servlet response  * @throws ServletException if a servlet-specific error occurs  * @throws IOException if an I/O error occurs  */  @Override  protected void doPost(HttpServletRequest request, HttpServletResponse response)  throws ServletException, IOException {  processRequest(request, response);  }  /**  * Returns a short description of the servlet.  * @return a String containing servlet description  */  @Override  public String getServletInfo() {  return "Short description";  }// </editor-fold>  }        

3. Number Guessing Game

This guess the number game is a short Java project that allows the user to guess the number generated by the computer. There are also several ways to alter the game, like adding more rounds or displaying the score. It's quite simple and uses the random function to generate a number.

Source Code

          package guessinggame;  * Java game "Guess a Number" that allows user to guess a random number that has been generated.  */  import javax.swing.*;  publicclassGuessingGame {  publicstaticvoidmain(String[] args) {  int computerNumber = (int) (Math.random()*100 + 1);  int userAnswer = 0;  System.out.println("The correct guess would be " + computerNumber);  int count = 1;  while (userAnswer != computerNumber)  {  String response = JOptionPane.showInputDialog(null,  "Enter a guess between 1 and 100", "Guessing Game", 3);  userAnswer = Integer.parseInt(response);  JOptionPane.showMessageDialog(null, ""+ determineGuess(userAnswer, computerNumber, count));  count++;  }  }  publicstatic String determineGuess(int userAnswer, int computerNumber, int count){  if (userAnswer <=0 || userAnswer >100) {  return"Your guess is invalid";  }  elseif (userAnswer == computerNumber ){  return"Correct!\nTotal Guesses: " + count;  }  elseif (userAnswer > computerNumber) {  return"Your guess is too high, try again.\nTry Number: " + count;  }  elseif (userAnswer < computerNumber) {  return"Your guess is too low, try again.\nTry Number: " + count;  }  else {  return"Your guess is incorrect\nTry Number: " + count;  }  }  }        

4. Brick Breaker Game

This brick breaker game is one of many fun Java projects that has you trying to break bricks at the top of the screen. The player controls a tiny ball placed on a small platform at the bottom of the screen, which can be moved around from left to right using the arrow keys. The goal is to break the bricks without missing the ball with your platform. The project makes use of Java swing and OOPS concepts, among other things.

Source Code

5. Data Visualization Software

Data Visualization has become important as it displays data visually using statistical graphics and scientific visualization, to the point where data visualization software has been created. This project displays the node connectivity in networking in data visualization form. This node connectivity can be located at different locations via mouse or trackpad.

Source Code

6. ATM Interface

This somewhat complex Java project consists of five different classes and is a console-based application. When the system starts the user is prompted with a user id and user pin. After entering the details successfully, the ATM functionalities are unlocked.

Source Code

7. Web Server Management System

This web server management system project deals with the information, maintenance, and information management of the web server. It covers several concepts, including tracing the physical location of an entity, and identifying URL authorities and names.

Source Code

8. Airline Reservation System

The project is a web-based one featuring open architecture that keeps up with the dynamic needs of the airline business by the addition of new systems & functionality. The project includes online transactions, fares, inventory, and e-ticket operations.

The software consists of four key modules, i.e., user registration, login, reservation, and cancellation. The app allows communication through a TCP/IP network protocol thereby facilitating the usage of internet & intranet communication globally.

Source Code

9. Online Book Store

This project is mainly developed for bookstores and shops to digitize the book purchasing process. The aim is to create an efficient and reliable online bookselling platform. It also records sold and stock books automatically in the database.

Source Code

10. Snake Game in Java

If you are a '90s kid or an adult you have probably played this game on your phone. The goal of this game is to make the snake eat the tokens without the snake being touched to the boundary on the screen. Every time the snake eats the token the score is updated. The player loses when the snake touches the boundary and the final score is displayed.

Source Code

Start Practicing with These Java Projects

Whether it's playing games, withdrawing money from ATMs, online shopping, or even reserving an airline ticket, Java can help. It is a robust and secure language and that is what makes it developers' favorite to execute such projects.

If you're a complete beginner, Learn Java with Code Academy

Frequently Asked Questions

What Type of Projects is Java Used for?

Java is used in all sorts of applications. However, it dominates mobile application development. It is also used in web servers, games, and desktop applications.

What Are Some Beginner Java Projects?

There are several beginner java projects, including a book management system, an airline ticketing management system, and the snake game. The list above does a good job of covering beginner Java project ideas.

How Easy is it to Implement These Projects?

The difficulty of implementing Java projects varies according to their complexity. Some projects in the beginner list above are tougher than others, but most are fairly easy to implement. The one on the list are Java projects with source code, so that should make it easier.

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Source: https://hackr.io/blog/java-projects

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