(Jan 6, 2018 02:19 PM)OneHalf Wrote:  

Hey everyone - I'm sure some of you have seen I'm working on an MMORPG - and I was working on a chat client for it and I just (semi) finished it. It's a functional chat client with no GUI yet but I decided to post it separate because a few days ago I saw someone posting asking about making a chat client in Java so here it is! If you have any questions please post below - this isn't a tutorial so I'm not going to dissect the code.

Server.java

Code

package dev.omega.OmegaOnline.connect;

import java.net.ServerSocket;
import java.io.*;
import java.net.*;

public class Server {

static ServerSocket serverSocket;
static Socket socket;
static DataOutputStream out;
static Users[]user = new Users[10];
static DataInputStream in;

public static void main(String[] args) throws Exception {
System.out.println("Starting server....");
serverSocket = new ServerSocket(7777);
System.out.print("Server started....");
while(true) {
socket = serverSocket.accept();
for(int i = 0; i < 10;i++) {

System.out.println("Connection from: " + socket.getInetAddress());
out = new DataOutputStream(socket.getOutputStream());
in = new DataInputStream(socket.getInputStream());
if(user[i] == null) {
user[i] = new Users(out,in,user);
Thread thread = new Thread(user[i]);
thread.start();
break;
}
}
}
}
}
class Users implements Runnable{

DataOutputStream out;
DataInputStream in;
Users[]user = new Users[10];
String username;

public Users(DataOutputStream out, DataInputStream in,Users[]user) {
this.out = out;
this.in = in;
this.user = user;
}

public void run() {
try {
username = in.readUTF();
} catch (IOException e1) {
e1.printStackTrace();
}
while(true) {
try {
String message = in.readUTF();
for (int i =0 ; i < 10; i++) {

if(user[i] != null) {
user[i].out.writeUTF(username + ":" + message);
}
}
}catch(IOException e) {
this.out = null;
this.in = null;

}

}

}

}

Client.java

Code

package dev.omega.OmegaOnline.connect;

import java.net.*;
import java.util.Scanner;
import java.io.*;

public class Client {

static Socket socket;
static DataInputStream in;
static DataOutputStream out;


public static void main(String[] args) throws Exception {
System.out.println("Connecting....");
socket = new Socket("localhost",7777);
System.out.println("Connection successful!");
in = new DataInputStream(socket.getInputStream());
out = new DataOutputStream(socket.getOutputStream());
Input input = new Input(in);
Thread thread = new Thread(input);
thread.start();
Scanner sc = new Scanner(System.in);
System.out.println("Enter your username then press enter!");
String username = sc.nextLine();
out.writeUTF(username);
while(true) { 
String sendMessage = sc.nextLine();
out.writeUTF(sendMessage);
}

}

}

class Input implements Runnable{

DataInputStream in;

public Input(DataInputStream in) {
this.in = in;
}

public void run() {
while(true) {
String message;
try {
message = in.readUTF();
System.out.println(message);
} catch (IOException e) {
e.printStackTrace();
}

}

}

}

How to use -> In your IDE create "Server.java" and "Client.java" Copy paste code -> Run "Server" -> Run "Client" twice! (It's multi threaded and connected) So you can switch between client 1 & client 2 to see how the chat works! 

(Jan 7, 2018 01:47 PM)weld Wrote:  A beautiful share, excellent work OneHalf :)

(Jan 7, 2018 02:49 PM)Kronk1337 Wrote:  Nice, will play around a bit with this! Thank you :)

(Oct 3, 2024 10:39 AM)RoundLettuce Wrote:  Okay. This is really cool!
I have a question, but I have no idea if you're active. I hope you reply! :)
I'm a newb in Java, please can you tell me what this line does?

package dev.omega.OmegaOnline.connect;

What is it connecting to? Is it an external source? Java library?. I'm sooo confused! Sorry!
Hope you can reply please, OneHalf.