CPU 100% usage

Question

Hi I am using Sockets to connect a client to the server. When I check the CPU usage on both machines, I realized
the CPU usage is up 100% max. The problem points to the way I code by always having a while loop to poll for more
messages as follows ...
How can I solve this problem, any help?
               while(!endTour){ //loop added by Dave
                    msg = (MessageInterface)ois.readObject();                                        
                    if(msg.getMessageID()==1){
                         tres = (TourResponse)msg;                                                                                   
                      mbar.updateCurrentLogicalArea(tres); //added by dave                                            
                    else if(msg.getMessageID()==2){                                                  
                       vtourloc=(VTourLocation)msg;                   
                       mbar.updateLocation(vtourloc); //added by dave
                    else if(msg.getMessageID()==3){ //added by dave
                       tourRequest=(TourRequest)msg;
                       if(tourRequest.getConnectOK())                      
                            System.out.println("Client is connected");                            
                       else
                            System.out.println(tourRequest.getErrMessage());                                 
             }

Answer 1

import java.lang.InterruptedException;
public class WaitNotifyExample implements Runnable
    public int getSomeInfo()
        // do something useful
        return 0;
    public void eventOccured()
        notifyAll();
    public void run()
        synchronized (this)
            while (true)
                if (getSomeInfo() == 1)
                    // do something useful
                try
                    wait();
                catch(InterruptedException e)
                    // does this ever happen?
                    e.printStackTrace();
}