(Java) Accept Connection on Socket

Demonstrates how to create a TCP/IP socket, listen on a port, accept an incoming connection, and send a "Hello World" message to the client.

Note: This example requires Chilkat v11.0.0 or greater.

Chilkat Java Downloads Java Libs for Windows, MacOS, Linux, Alpine Linux Java Libs for Android

import com.chilkatsoft.*;

public class ChilkatExample {

  static {
    try {
        System.loadLibrary("chilkat");
    } catch (UnsatisfiedLinkError e) {
      System.err.println("Native code library failed to load.\n" + e);
      System.exit(1);
    }
  }

  public static void main(String argv[])
  {
    boolean success = false;

    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    CkSocket listenSocket = new CkSocket();

    // Bind to a port and listen for incoming connections:
    // This example will listen at port 5555 and allows for a backlog
    // of 25 pending connection requests.
    success = listenSocket.BindAndListen(5555,25);
    if (success == false) {
        System.out.println(listenSocket.lastErrorText());
        return;
        }

    // Get the next incoming connection
    // Wait a maximum of 20 seconds (20000 millisec)
    CkSocket connectedSocket = new CkSocket();
    success = listenSocket.AcceptNext(20000,connectedSocket);
    if (success == false) {
        System.out.println(listenSocket.lastErrorText());
        return;
        }

    // Set maximum timeouts for reading an writing (in millisec)
    connectedSocket.put_MaxReadIdleMs(10000);
    connectedSocket.put_MaxSendIdleMs(10000);

    // Send a "Hello World!" message to the client:
    success = connectedSocket.SendString("Hello World!");
    if (success != true) {
        System.out.println(connectedSocket.lastErrorText());
        return;
        }

    // Close the connection with the client.
    // Wait a max of 20 seconds (20000 millsec)
    success = connectedSocket.Close(20000);

    System.out.println("success!");
  }
}