Looking at the above statistics you must have understood that becoming a java developer is not all you have on your plate, applying it to develop and deploy some simple and fun projects is more important to give your resume a push in the software industry.
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Note that the extensions might require some expertise on the Android platform, which might not be taken upon immediately for most Java beginners. So, if you are more into app development, this is an exciting java project idea to start with.
A media player application may require extensive Java knowledge before it is successfully made, but it can be very rewarding to figure out how to build one. That is why it is an interesting java project for new programmers.
The recommendation for new programmers making a project for the first time is to get started with the projects like the temperature converter, the digital clock, the link shortener, or the memory game. These are the most simple java project ideas for beginners.
If you are a beginner then you can start with some java projects like Bank Management Software, Electricity Billing System, Temperature Converter, Supermarket Billing Software. We can also build Digital Clock, Quizzing App, Email-Client Software, Student Management System, Airline Management System or Food Ordering System.
Java projects are important for developing core java skills and it also helps to shine your resume. If you are beginner, projects are a way to show that one understands the underlying concepts of the programming language and are ready to apply it to solve real-world problems.
Hi, thank you for this very interesting guide. The Flappy Bird.jar file is working, but the source code isn't, when i copy your source code (classes), the game doesn't start. Here is the error that eclipse gives me:Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
Four applications are presented in order of increasing complexity:A trivial date server and client, illustrating simple one-way communication. The server sends data to the client only.A capitalize server and client, illustrating two-way communication, and server-side threads to more efficiently handle multiple connections simultaneously.A two-player tic tac toe game, illustrating a server that needs to keep track of the state of a game, and inform each client of it, so they can each update their own displays.A multi-user chat application, in which a server must broadcast messages to all of its clients.These applications communicate insecurely.None of these applications even try to secure communication. All data is sent between hosts completely in the clear. The goal at this point is to illustrate the most basic applications and how they use transport-level services. In real life, use a secure sockets layer.A Trivial Sequential ServerThis is perhaps the simplest possible server. It listens on port 59090. When a client connects, the server sends the current datetime to the client. The connection socket is created in a try-with-resources block so it is automatically closed at the end of the block. Only after serving the datetime and closing the connection will the server go back to waiting for the next client.DateServer.javaimport java.io.IOException;import java.io.PrintWriter;import java.net.ServerSocket;import java.net.Socket;import java.util.Date;/** * A simple TCP server. When a client connects, it sends the client the current * datetime, then closes the connection. This is arguably the simplest server * you can write. Beware though that a client has to be completely served its * date before the server will be able to handle another client. */public class DateServer public static void main(String[] args) throws IOException try (var listener = new ServerSocket(59090)) System.out.println("The date server is running..."); while (true) try (var socket = listener.accept()) var out = new PrintWriter(socket.getOutputStream(), true); out.println(new Date().toString()); Discussion:
This next server receives lines of text from a client and sends back the lines uppercased. It efficiently handles multiple clients at once: When a client connects, the server spawns a thread, dedicated to just that client, to read, uppercase, and reply. The server can listen for and serve other clients at the same time, so we have true concurrency.CapitalizeServer.javaimport java.io.IOException;import java.io.PrintWriter;import java.net.ServerSocket;import java.net.Socket;import java.util.Scanner;import java.util.concurrent.Executors;/** * A server program which accepts requests from clients to capitalize strings. * When a client connects, a new thread is started to handle it. Receiving * client data, capitalizing it, and sending the response back is all done on * the thread, allowing much greater throughput because more clients can be * handled concurrently. */public class CapitalizeServer /** * Runs the server. When a client connects, the server spawns a new thread to do * the servicing and immediately returns to listening. The application limits * the number of threads via a thread pool (otherwise millions of clients could * cause the server to run out of resources by allocating too many threads). */ public static void main(String[] args) throws Exception try (var listener = new ServerSocket(59898)) System.out.println("The capitalization server is running..."); var pool = Executors.newFixedThreadPool(20); while (true) pool.execute(new Capitalizer(listener.accept())); private static class Capitalizer implements Runnable private Socket socket; Capitalizer(Socket socket) this.socket = socket; @Override public void run() System.out.println("Connected: " + socket); try var in = new Scanner(socket.getInputStream()); var out = new PrintWriter(socket.getOutputStream(), true); while (in.hasNextLine()) out.println(in.nextLine().toUpperCase()); catch (Exception e) System.out.println("Error:" + socket); finally try socket.close(); catch (IOException e) System.out.println("Closed: " + socket); Discussion:
Now for a pretty simple command line client:CapitalizeClient.javaimport java.io.IOException;import java.io.InputStreamReader;import java.io.PrintWriter;import java.net.Socket;import java.util.Scanner;public class CapitalizeClient public static void main(String[] args) throws Exception if (args.length != 1) System.err.println("Pass the server IP as the sole command line argument"); return; try (var socket = new Socket(args[0], 59898)) System.out.println("Enter lines of text then Ctrl+D or Ctrl+C to quit"); var scanner = new Scanner(System.in); var in = new Scanner(socket.getInputStream()); var out = new PrintWriter(socket.getOutputStream(), true); while (scanner.hasNextLine()) out.println(scanner.nextLine()); System.out.println(in.nextLine()); This client repeatedly reads lines from standard input, sends them to the server, and writes server responses. It can be used interactively:
(The reader may wonder what actual data structure is used to hold the achievements: is it an array, or a linked list, or something else?At this level of modeling, that's probably not important. You could use UMLto show that Player aggregates a java.util.LinkedList,and that this list aggregates Achivement objects, but unlessthat's essential to your reader, you're best to skip it.) 2ff7e9595c