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  1. #1
    saru88 is offline Member
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    Default Datagram Client and Server, client timer question

    hey,
    i'm very new to networking in Java and I'm trying to implement
    a datagram client and server. My problem atm is writing a timer for the
    client in java so that if the server does not respond within a certain time period then the client's request is resent. Could someone please show me how i would do this :), i have looked at the Timer class but my experimentation with it failed.

    This was my experiment, out of curiousity could u tell me why "hello" was
    not printed out.

    Java Code:
    import java.awt.event.ActionEvent;
    import java.awt.event.ActionListener;
    
    import javax.swing.Timer;
    
    public class Timers {
    
    	public static void main(String[] args){
    
    		int delay = 1000; //milliseconds
    		  ActionListener taskPerformer = new ActionListener() {		     
    
    			@Override
    			public void actionPerformed(ActionEvent arg0) {
    				System.out.println("hello");
    				
    			}
    		  };
    		  new Timer(delay, taskPerformer).start();
    	}
    }
    Thanx :)

  2. #2
    Norm's Avatar
    Norm is offline Moderator
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    Default

    It probably is the type of thread that Timer uses. If the main thread exits, the jvm exits and the timer is lost.
    Read about daemon threads.
    Add a try{Thread.sleep(2000);}catch(Exception x){} // wait
    before main exits to see.

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