Free Java Projects for Beginners 2021 [With Source Code]

Best Java Project Ideas for Beginners

Check out these best Java Project Ideas to start your Java Programming Journey to get a kick-start in your career with these java projects designed for beginners.

Number 1: The Smart City Project

• Smart City project enables the tourists & other visitors to the city by providing them with information about hotels, transportation facilities, air ticket booking, shopping details, etc. Thence, it serves as a guide of the city to city visitors. It is a type of web software developed in Java programming language that solves most of our problems that any new visitor faces when they are coming to a new city like pathfinding, hotel searching, ticket booking and so many more things.

Source Code for: Smart City Project

Number 2: Currency Converter

Different countries have their different currencies and these currencies have daily alterations relative to one another. People must stay updated with the latest currency exchange rate while indulging in money transfer. So, the currency converter is a mini-Java project that provides us with a web-based interface for exchanging/converting money from one currency to another. It is developed using the Ajax, Java servlets web features. Such type of applications are being used for business, shares & finance-related areas.

/*
* 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
*/
class Recv
{
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 class Convert extends HttpServlet {
/**
* 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>
}

Number 3: Number Guessing Game

This is a fun and easy project “Guess the Number” in Java that allows the users to guess the number generated by the computer & inculcates the following steps:

1. The system generates a random number from a given range.
2. The user is prompted to enter their chosen number in a displayed dialogue box.
3. The computer then tells whether the entered number matches the guesses number or it is higher or lower than the number that has been generated.
4. The game then continues under the user guessing the number.

You can also include further details such as:

• Putting a limit on the number of attempts.
• Adding a few more rounds.
• Displaying the score.
• Giving points based on the number of attempts taken.

Number 4: Brick Breaker Game

• Brick Breaker game consists of bricks that are aligned at the top of the screen. The player is represented as a small ball that is placed on a small platform at the very bottom of the screen. The platform can be moved around from right to left on the screen with the help of arrow keys which are there on the keyboard. The player uses the platform to keep the ball escaping. The goal is to break the bricks without missing the ball falling down from your platform. The project makes use of Java swing, and OOPS concepts and much more.

Source Code for this game: Brick Breaker Game

Number 5: Data Visualization Software

Source Code: Data Visualization Software

Number 6: ATM Interface

Source Code: ATM Interface

Number 7: Web Server Management System

Source Code: Web Server Management System

Number 8: Airline Reservation System

Source Code: Airline Reservation System

Number 9: Online Book Store

Source Code: Online Book Store

Number 10: Snake Game in Java

Source Code: Snake Game in Java

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