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Chat (part 6)

Java Multithreading, Level 6, Lesson 15

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need help ,what is wrong whit my code

Let's move on to the most important part: writing the Server class.
The server must support multiple simultaneous connections with different clients.
This can be done using the following algorithm:
- The server creates a server socket connection.
- In a loop, the server waits for some client to connect to the socket.
- It creates a new Handler thread on which messages will be exchanged with the client.
- It waits for another connection.

Add the following:
1) To the Server class, a nested private static Handler class that inherits Thread.
2) To the Handler class, a Socket socket field.
3) To the Handler class, a constructor that has a Socket parameter and uses it to initialize the appropriate field.
4) The Server's main method should:
a) Request a server port using ConsoleHelper.
b) Create a java.net.ServerSocket object using the port from the previous step.
c) Display a message indicating that the server is running.
d) In an infinite loop, listen for and accept incoming socket connections with the newly created server socket.
e) Create and start a new Handler thread, passing the socket from the previous step to the constructor.
e) Once the Handler thread is created, proceed to the next iteration of the loop.
g) Be sure that the server socket is closed if there is an exception.
h) If an Exception occurs, catch it and display an error message.

Requirements:

A private static Handler class that inherits Thread should be created in the Server class.
The Handler class must have a Socket socket field.
The Handler class constructor must have one Socket parameter and initialize the socket field.
The main() method should read the server port from the keyboard using the ConsoleHelper class's readInt() method.
The main() method should correctly implement the infinite loop described in the task conditions.

package com.codegym.task.task30.task3008; import java.io.IOException; import java.net.ServerSocket; import java.net.Socket; public class Server { private static class Handler extends Thread { private Socket socket; public Handler(Socket socket) { this.socket = socket; } } public static void main(String[] args) throws IOException { int port = ConsoleHelper.readInt (); java.net.ServerSocket serverSocket = new ServerSocket ( port ); System.out.println ( "Server is running" ); while(true){ Socket socket = null; try { socket = serverSocket.accept (); Thread handler = new Handler ( socket ); handler.start (); }catch (Exception o){ socket.close (); System.out.println ("Error" + o ); } } } }

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June Sung Park

Level 41 , Yangp'yong, Korea, Republic of

30 July 2020, 02:26

Change line 34 to <<serverSocket.close();>>. Add <<break;>> after line 35. These were what I did to pass the test.

KIN SOCHEAT

Level 34 , Phnom Penh, Cambogia

30 June 2020, 09:14

System.out.println ("Error" + o ); serverSocket.close();

Wei Cui

Level 39 , Newark, United States

15 April 2020, 02:33

public static void main(String[] args) {
        ConsoleHelper.writeMessage("Input server port: ");
        try (ServerSocket serverSocket = new ServerSocket(ConsoleHelper.readInt())){

            while (true) {
                new Handler(serverSocket.accept()).start();
            }
        } catch (IOException e) {
            ConsoleHelper.writeMessage("Something wrong, Server socket closed.");
        }

    }

jorge ives murillo paredes

Level 40 , New York City, United States

19 April 2020, 04:28

thanks ,but the problem is the wait and notify in the run method in the client class