callbackservant.java

远程网络画板,用JAVA RMI实现,远程的多个用户可以同时在同一画板上绘画

package whiteboard;
import java.rmi.*;
import java.rmi.server.UnicastRemoteObject;

public class CallBackServant extends UnicastRemoteObject implements CallBack
{
	WhiteboardFrame frame;
    public CallBackServant(WhiteboardFrame f) throws RemoteException
    {
    	frame=f;
    }

    public void callback(boolean udate) throws RemoteException
    {
    	frame.whiteboardupdate();
    	if(udate)
    	    frame.update(frame.getGraphics());
    }
    public void callback(String warning) {
        frame.showWarning(warning);
    }
}