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Screenshot des Programms läuft ein Fenster unter Verwendung von Steuer D/Z schließen (oben links: Server, der Rest sind Clients): 
Wie ohne Verlassen des gesamten Programms (multithreaded Java-Buchse)
In der rechten unteren Fenster, ich versuche, Control D (Mac) zu drücken (für Windows ist es die Kontrolle Z), um das untere rechte Fenster/Client allein zu verlassen, ohne die gesamte Anwendung/Programm zu beenden, aber es scheint nicht zu arbeiten, weil ich kann immer noch "es hat nicht funktioniert" und es gibt die Nachricht aus.
Meine Frage ist: Welche Änderungen kann ich an den folgenden Code vornehmen, sodass, wenn ein Client Control D drückt, nur ein Fenster/Client geschlossen wird und die gesamte Anwendung nicht beendet wird?
Teil des Codes, der das Fenster (derzeit leer) schließen sollte:
//This is the code that prints messages to all clients
synchronized (this)
{
for (int i = 0; i < maxClientsCount; i++)
{
if (!line.equals(null) && !line.equals("null") && !line.equals(null) && !line.equals("F") && !line.equals("m") && !line.equals("M") && threads[i] != null && threads[i].clientName != null && !threads[i].clientName.equals("m") && !threads[i].clientName.equals("M"))
{
if(!line.equals("") == true && line.isEmpty()== false)
{
threads[i].os.println(name + ": " + line);
}
}
//After Control D/Z is pressed, this code will execute
else if(line.equals(null) || line.equals("null") || line.contains("null"))
{
try
{
//This code location exits the program, system.exit(0) and system.exit(-1) didn't work
//how do i close only one client window here without exiting the whole program?
}
catch (NullPointerException ignored)
{
}
finally
{
}
// threads[i].os.close();
// System.exit(0);
}
}
}
HINWEIS: UM DEN REST SKIP und scrollen Sie nach unten, wenn Sie bereits die
Voll Code von ClientThreads.java Antwort kennen :
import java.io.*;
import java.net.*;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.nio.file.StandardCopyOption;
import java.util.*;
import java.nio.*;
import java.nio.channels.FileChannel;
class ClientThreads extends Thread
{
public String path = "";
public String name1 = "";
private String clientName = null;
private DataInputStream is = null;
private PrintStream os = null;
private Socket clientSocket = null;
private final ClientThreads[] threads;
private int maxClientsCount;
public int position = 0;
public static List<String> listName = Collections.synchronizedList(new ArrayList<String>());
List<String> l = Collections.synchronizedList(new ArrayList<String>());
public String[] namesList = new String[10];
public ClientThreads(Socket clientSocket, ClientThreads[] threads,
String name, String[] namesList, List<String> listName)
{
this.clientSocket = clientSocket;
this.threads = threads;
maxClientsCount = threads.length;
this.name1 = name;
this.namesList = namesList;
}
@SuppressWarnings("deprecation")
public void run()
{
int maxClientsCount = this.maxClientsCount;
ClientThreads[] threads = this.threads;
synchronized (listName)
{
//Iterator i = listName.iterator(); // Must be in synchronized block
ListIterator<String> i = listName.listIterator();
}
try
{
is = new DataInputStream(clientSocket.getInputStream());
os = new PrintStream(clientSocket.getOutputStream());
String name;
String name3;
while (true)
{
//os.println("What is your name?");
name = is.readLine().trim();
name3 = name;
break;
}
synchronized(listName)
{
if(!listName.contains(name))
{
if(!listName.contains(name) && name != null && !name.isEmpty())
{
listName.add(name);
Path currentRelativePath = Paths.get("");
path = currentRelativePath.toAbsolutePath().toString();
}
}
}
synchronized (this)
{
for (int i = 0; i < maxClientsCount; i++)
{
if (threads[i] != null && threads[i] == this)
{
clientName = "@" + name;
break;
}
}
for (int i = 0; i < maxClientsCount; i++)
{
if (threads[i] != null)
{
}
}
}
while (true)
{
synchronized(listName)
{
}
String line = is.readLine();
if (line.contains("3582938758912781739713asfaiwef;owjouruuzlxjcjnbbiewruwoerpqKFDJiuxo9"))
{
break;
}
else
{
}
synchronized (this)
{
for (int i = 0; i < maxClientsCount; i++)
{
if (!line.equals(null) && !line.equals("null") && !line.equals(null) && !line.equals("F") && !line.equals("m") && !line.equals("M") && threads[i] != null && threads[i].clientName != null && !threads[i].clientName.equals("m") && !threads[i].clientName.equals("M"))
{
if(!line.equals("") == true && line.isEmpty()== false)
{
threads[i].os.println(name + ": " + line);
}
}
else if(line.equals(null) || line.equals("null") || line.contains("null"))
{
try
{
//This code location exits the program, system.exit(0) and system.exit(-1) didn't work
//how do i close only one client window here without exiting the whole program?
}
catch (NullPointerException ignored)
{
}
finally
{
}
// threads[i].os.close();
// System.exit(0);
}
}
}
// }
}
synchronized (this)
{
for (int i = 0; i < maxClientsCount; i++)
{
if (threads[i] != null && threads[i] != this && threads[i].clientName != null)
{
// threads[i].os.println(name + "has disconnected.");
threads[i].listName.remove(name);
listName.remove(name);
// threads[i].os.println("The list now contains: " + listName);
// System.out.println("A user disconnected. The list now contains: " +listName);
}
}
}
synchronized (this)
{
for (int i = 0; i < maxClientsCount; i++)
{
if (threads[i] == this)
{
//threads[i] = null;
}
}
}
// is.close();
// os.close();
//clientSocket.close();
}
catch (IOException e)
{
}
}
}
Voll Code von ChatClient.java:
import java.io.*;
import java.net.*;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
public class ChatClient implements Runnable
{
public static String path = "";
private static Socket clientSocket = null;
private static PrintStream os = null;
private static DataInputStream is = null;
private static BufferedReader inputLine = null;
private static boolean closed = false;
public static String[] namesList = new String[10];
public int iteration = 0;
public static String[] responses = new String[50];
public int responseCount = 0;
public static final int maxClientsCount = 10;
public static final ClientThreads[] threads = new ClientThreads[maxClientsCount];
public static List<String> listName = Collections.synchronizedList(new ArrayList<String>());
List<String> l = Collections.synchronizedList(new ArrayList<String>());
public ChatClient()
{
}
public static void main(String[] args)
{
for(int i = 0; i < namesList.length; i++)
{
namesList[i] = "";
}
for(int j = 0; j < responses.length; j++)
{
responses[j] = "";
}
// System.out.println("args[0] is: " + args[0]);
int portNumber = Integer.valueOf(args[0]);
String host = "localhost";
//int filePort = Integer.valueOf(args[0]);
try
{
synchronized(listName)
{
clientSocket = new Socket(host, portNumber);
inputLine = new BufferedReader(new InputStreamReader(System.in));
os = new PrintStream(clientSocket.getOutputStream());
is = new DataInputStream(clientSocket.getInputStream());
}
}
catch (UnknownHostException e)
{
//System.err.println("Don't know about host " + host);
} catch (IOException e)
{
// System.err.println("Couldn't get I/O for the connection to the host "
// + host);
}
if (clientSocket != null && os != null && is != null)
{
try
{
new Thread(new ChatClient()).start();
while (!closed)
{
os.println(inputLine.readLine());
}
// os.close();
//is.close();
//clientSocket.close();
}
catch (IOException e)
{
// System.err.println("IOException: " + e);
}
}
}
@SuppressWarnings("deprecation")
public void run()
{
String responseLine = "";
try
{
while ((responseLine = is.readLine()) != null)
{
if(responseLine!=null && !responseLine.equals(null) && responseLine!="null" && !responseLine.equals("null") && !responseLine.contains("null"))
{
System.out.println(responseLine);
}
else if(responseLine.contains("null") || responseLine.equals("null") || responseLine==null || responseLine.equals(null))
{
//This is another location which will be executed if Control D/Control Z is pressed
//os.close();
// is.close();
//System.exit(0);
}
}
//closed = true;
}
catch (IOException e)
{
// System.err.println("IOException: " + e);
}
}
}
Voll Code von ChatServer.java:
import java.io.*;
import java.net.*;
import java.util.*;
public class ChatServer
{
public static List<String> listName = Collections.synchronizedList(new ArrayList<String>());
List<String> l = Collections.synchronizedList(new ArrayList<String>());
public static ServerSocket serverSocket = null;
public static Socket clientSocket = null;
public static final int maxClientsCount = 10;
public static final ClientThreads[] threads = new ClientThreads[maxClientsCount];
public static String[] namesList = new String[10];
// public ChatClient arrayOfNames = new ChatClient;
public static void main(String args[])
{
synchronized (listName)
{
//Iterator i = listName.iterator(); // Must be in synchronized block
Iterator<String> i = listName.listIterator();
}
int once = 0;
if(once == 0)
{
// System.out.println("args[0] is: " + args[0]);
int portNumber = Integer.valueOf(args[0]);
// System.out.println("waiting for connections on port " + portNumber + " ...\n ");
once = 3;
}
once = 3;
try
{
int portNumber1 = Integer.valueOf(args[0]);
serverSocket = new ServerSocket(portNumber1);
}
catch (IOException e)
{
System.out.println(e);
}
while (true)
{
try
{
clientSocket = serverSocket.accept();
int i = 0;
for (i = 0; i < maxClientsCount; i++)
{
if (threads[i] == null)
{
String name = "";
(threads[i] = new ClientThreads(clientSocket, threads, name, namesList, listName)).start();
break;
}
}
if (i == maxClientsCount)
{
//PrintStream os = new PrintStream(clientSocket.getOutputStream());
// os.println("Server too busy. Try later.");
// os.close();
// clientSocket.close();
}
}
catch (IOException e)
{
System.out.println(e);
}
}
}
}
EDIT: es könnte auch möglich sein, Threads zu ändern [i] auf Threads [i + 1], um den Überblick über verschiedene Clients in bestimmten Teilen zu halten des Codes