2 つ以上のクライアント間の通信を可能にするプログラムを作成しようとしています。あるサイトからほとんどの情報源を入手しましたが、2 つのクライアントに他のクライアントの発言を実際に表示させる方法がわかりませんでした。それらは独自のスレッドで実行されるため、サーバーは、接続されているすべての人にテキストを渡すのではなく、送信者のスレッドにのみテキストを返すだけだと思います。
package Server;
import java.net.*;
import java.util.*;
import java.io.*;
import javax.swing.*;
import java.awt.*;
public class Server extends JFrame
{
//A JTextArea to hold the information received from clients
JTextArea chatBox = new JTextArea();
public static void main(String[] args)
{
new Server();
}
public Server()
{
//We need to set up a layout for our window
setLayout(new BorderLayout());
//Only display text, do not allow editing
chatBox.setEditable(false);
//Add our chatbox in the center with scrolling abilities
add(new JScrollPane(chatBox), BorderLayout.CENTER);
setTitle("Chat Server");
setSize(550,400);
//If the user closes then exit out
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//Show the frame
setVisible(true);
//We need a try-catch because lots of errors can be thrown
try {
ServerSocket sSocket = new ServerSocket(8123);
chatBox.append("Server started at: " + new Date()+"\n");
//Loop that runs server functions
while(true) {
//Wait for a client to connect
Socket socket = sSocket.accept();
int Port = socket.getPort();
InetAddress IP = socket.getInetAddress();
System.out.println("INFO: Incoming connection from: "+IP+":"+Port);
chatBox.append("INFO: Incoming connection from: "+IP+":"+Port+"\n");
//Create a new custom thread to handle the connection
ClientThread cT = new ClientThread(socket);
//Start the thread!
new Thread(cT).start();
}
} catch(IOException exception) {
System.out.println("Error: " + exception);
}
}
//Here we create the ClientThread inner class and have it implement Runnable
//This means that it can be used as a thread
class ClientThread implements Runnable
{
Socket threadSocket;
//This constructor will be passed the socket
public ClientThread(Socket socket)
{
//Here we set the socket to a local variable so we can use it later
threadSocket = socket;
}
public void run()
{
//All this should look familiar
try {
//Create the streams
PrintWriter output = new PrintWriter(threadSocket.getOutputStream(), true);
BufferedReader input = new BufferedReader(new InputStreamReader(threadSocket.getInputStream()));
//Tell the client that he/she has connected
output.println("You have connected at: " + new Date());
chatBox.append("Client connected\n");
//This will wait until a line of text has been sent
String chatInput = input.readLine();
//Add the chat to the text box
chatBox.append(chatInput+"\n");
System.out.println(chatInput);
output.println(chatInput);
} catch(IOException exception) {
System.out.println("ERROR: " + exception);
chatBox.append("ERROR: "+exception);
}
}
}
}