1  //////////////////////////////////////\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\
 2  /////////////////////////////// RMIcount.java \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\
 3  //////////////////////////////////////\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\

 4  import java.rmi.*;

 5  interface RMIcount extends Remote {
 6     void add( int in ) throws RemoteException;
 7     int  get() throws RemoteException;
 8  }

 9  ///////////////////////////// RMIcountImpl.java \\\\\\\\\\\\\\\\\\\\\\\\\\\\

10  import java.rmi.*;
11  import java.rmi.server.*;

12  public class RMIcountImpl extends    UnicastRemoteObject
13                            implements RMIcount {
14     private int total;
15     public RMIcountImpl() throws RemoteException {
16        total = 0;
17        System.out.println( "RMIcountImpl ctor" );
18     }
19     public void add( int in ) {
20        total += in;
21        System.out.println( "total is " + total );
22     }
23     public int get() {
24        return total;
25  }  }

26  //////////////////////////// RMIcountServer.java \\\\\\\\\\\\\\\\\\\\\\\\\\\

27  import java.rmi.*;
28  import java.rmi.server.*;

29  public class RMIcountServer {
30     public static void main( String[] args ) {
31        System.setSecurityManager( new RMISecurityManager() );
32        try {
33           RMIcountImpl obj = new RMIcountImpl();
34           Naming.rebind( "theOne", obj );
35           System.out.println( "theOne is bound" );
36        } catch (Exception ex ) {
37           System.out.println( ex );
38  }  }  }

39  //////////////////////////// RMIcountClient.java \\\\\\\\\\\\\\\\\\\\\\\\\\\

40  import java.rmi.*;
41  import java.rmi.server.*;

42  public class RMIcountClient {
43     public static void main( String[] args ) {
44        System.setSecurityManager( new RMISecurityManager() );
45        String url = "rmi://trpc04/";
46        try {
47           RMIcount obj = (RMIcount) Naming.lookup( url + "theOne" );
48           System.out.print( "enter number (0 for total, -1 to exit): " );
49           int ans = Read.anInt();
50           while (ans != -1) {
51              if (ans == 0)
52                 System.out.println( "   total is " + obj.get() );
53              else
54                 obj.add( ans );
55              System.out.print( "enter number (0 for total, -1 to exit): " );
56              ans = Read.anInt();
57           }
58        } catch (Exception ex ) {
59           System.out.println( ex );
60        }
61        System.exit( 0 );
62  }  }

63  // -- DO server (RMIcountServer, RMIcountImpl) --
64  // RMIcountImpl ctor
65  // theOne is bound
66  // total is 1
67  // total is 3
68  // total is 6
69  // total is 10
70  //
71  // -- client application (RMIcountClient) --
72  // enter number (0 for total, -1 to exit): 1
73  // enter number (0 for total, -1 to exit): 2
74  // enter number (0 for total, -1 to exit): 3
75  // enter number (0 for total, -1 to exit): 0
76  //    total is 6
77  // enter number (0 for total, -1 to exit): 4
78  // enter number (0 for total, -1 to exit): 0
79  //    total is 10
80  // enter number (0 for total, -1 to exit): -1