helloclient.java

JAVA分布式程序学习的课件（全英文）

// A sample Java IDL object client application.
import HelloApp.*;
import org.omg.CosNaming.*;
import org.omg.CosNaming.NamingContextPackage.*;
import org.omg.CORBA.*;

public class HelloClient
{
  static Hello helloImpl;

  public static void main(String args[]){
     try{
        // create and initialize the ORB
	     ORB orb = ORB.init(args, null);

        // get the root naming context
        org.omg.CORBA.Object objRef = 
	     orb.resolve_initial_references("NameService");
        // Use NamingContextExt instead of NamingContext, 
        // part of the Interoperable naming Service.  
        NamingContextExt ncRef = 
          NamingContextExtHelper.narrow(objRef);
 
        // resolve the Object Reference in Naming
        String name = "Hello";
        helloImpl = 
          HelloHelper.narrow(ncRef.resolve_str(name));

        System.out.println
          ("Obtained a handle on server object: " 
            + helloImpl);
        System.out.println(helloImpl.sayHello());
        helloImpl.shutdown();

	  } 
     catch (Exception e) {
        System.out.println("ERROR : " + e) ;
	     e.printStackTrace(System.out);
	  } 
  } //end main

} // end class