Problem to capture screen shot

Question

hi,
i am new learner in rmi.here i would like to capture a screen on server pc then return it to client pc using rmi.here are the code which i had done(no complete yet because have error when compile it).
1) interface
package AplicationRemoteEngine.client;
public interface ComputeEngin extends Remote
  Object execute(Robot robot)throws RemoteException;
2) interfaceImpl
package AplicationRemoteEngine.client;
public class ComputeEnginImpl extends UnicastRemoteObject implements ComputeEngin
  public ComputeEnginImpl() throws RemoteException
    super();
  public static void main(String[] args)throws Exception
    if (System.getSecurityManager() == null) {
        System.setSecurityManager(new RMISecurityManager());
    String name = "//host/Compute";
    try{
      ComputeEnginImpl computeEnginImpl = new ComputeEnginImpl();
      Naming.rebind(name, computeEnginImpl);
      System.out.println("ComputeEngine bound");
    catch(Exception exception)
        exception.printStackTrace();
  public Object execute(Robot robot) throws IOException
    Toolkit defaultTookit = Toolkit.getDefaultToolkit();
    Rectangle shotArea = new Rectangle(defaultTookit.getScreenSize());
    ByteArrayOutputStream bout = new ByteArrayOutputStream();
    JPEGImageEncoder encoder =
                              JPEGCodec.createJPEGEncode(bout);
    encoder.encode(robot.createScreenCapture(shotArea));
    return bout.toByteArray();  
  public String toString()
    return "ScreenShot";
}so,can anyone tell me or give me a guide how to capture a screen shot form server and return it to client and how client can accept that result?
any hits are welcome.thank you every much.

Answer 1

hi,thankx for your reply.
below are the errors when i compile it:
Error(16,8):
method execute(java.awt.Robot) in class AplicationRemoteEngine.client.ComputeEnginImpl cannot implement method execute(java.awt.Robot) in interface AplicationRemoteEngine.client.ComputeEngin, implemented method does not throw java.io.IOException
Error(48,17):
method execute(java.awt.Robot) in class AplicationRemoteEngine.client.ComputeEnginImpl cannot implement method execute(java.awt.Robot) in interface AplicationRemoteEngine.client.ComputeEngin, implemented method does not throw java.io.IOException
Error(54,27): statement not reachable
then,i have another question that is am i correct to implement the screen capture method?