Thread.destroy() no such method error

Question

im trying to destroy threads on my multi-threaded server as the connection to the client that that thread was for is terminated.
when i call destroy on the thread that contains the connection to the client that is disconnection it throws a runtime error:
Exception in thread "Thread-3" java.lang.NoSuchMethodError
at java.lang.Thread.destroy(Thread.java:870)
at ClientWorker.run(Server.java:55)
at java.lang.Thread.run(Thread.java:595)
when closing, the window listener for the client will send out one last message: "disconnect" and in response the ClientWorker class will get its thread and destroy it. but it wont let me destroy it... why?

Answer 1

public void run(){
Connect();
while(!socket.isClosed())
try{
          line = in.readLine();
          if (line == null || line.equals("/disconnect"))
try{
     client.close();
     server.removeUser(this);
          break;
     } catch(IOException ioe)
          System.out.println("Could not close " + this);
          break;
     else
server.echoMessage(line);
     } catch (IOException e) {
     e.printStackTrace();
                  break;
    finally
        try { socket.close(); } catch (IOException exc) {}
}