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1
36
37 import java.rmi.RemoteException  ;
38 import java.net.MalformedURLException ;
39 import java.rmi.NotBoundException ;
40 import javax.rmi.*;
41 import java.util.Vector ;
42 import javax.naming.NamingException ;
43 import javax.naming.InitialContext ;
44 import javax.naming.Context ;
45 import javax.swing.*;
46 import java.awt.*;
47 import java.awt.event.*;
48
49 public class HelloClient {
50
51 static JTextArea textArea;
52 java.awt.Container contentPane;
53 JFrame t;
54
55 public static void main( String args[] ) {
56 Context ic;
57 Object objref;
58 HelloInterface hi;
59
60 HelloClient helloClient = new HelloClient();
61 try {
62 ic = new InitialContext ();
63 } catch (NamingException e) {
64 System.out.println("failed to obtain context" + e);
65 textArea.append("Failed to obtain Context \n");
66 e.printStackTrace();
67 return;
68 }
69 try {
72 objref = ic.lookup("HelloService");
73 System.out.println("Client: Obtained a ref. to Hello server.");
74 textArea.append("Client Obtained a reference to Hello Server \n");
75 } catch (NamingException e) {
76 System.out.println("failed to lookup object reference");
77 textArea.append("Failed to lookup object reference\n");
78 e.printStackTrace();
79 return;
80 }
81
82 try {
85 hi = (HelloInterface) PortableRemoteObject.narrow(
86 objref, HelloInterface.class);
87 hi.sayHello( " Java Web Start Application - HelloClient " );
88 textArea.append("Invoked method sayHello() successfully \n");
89 } catch (ClassCastException e) {
90 System.out.println("narrow failed");
91 textArea.append("Narrow Failed\n");
92 e.printStackTrace();
93 return;
94 } catch( Exception e ) {
95 System.err.println( "Exception " + e + "Caught" );
96 e.printStackTrace( );
97 return;
98 }
99 textArea.append("Thanks for choosing Java Web Start\n");
100 }
101
102 public HelloClient()
103 {
104
105
106 t = new JFrame("RMI-IIOP CORBA Sample");
107 contentPane = t.getContentPane();
108 contentPane.setLayout( new FlowLayout() );
109 contentPane.setBackground(Color.white);
110 textArea = new JTextArea();
111 contentPane.add(textArea);
112 textArea.setText("Welcome to HelloWorld RMI Client-Server demo\n");
113 textArea.append("RMI Client started by Java Web Start.\n");
114 t.addWindowListener(new WindowAdapter(){
115 public void windowClosing(WindowEvent e)
116 {
117 t.setVisible(false);
118 System.exit(0);
119 }
120 });
121 t.pack();
122 t.setSize(500,400);
123 t.setVisible(true);
124 }
125
126 }
127
128
129
130 |
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Java API By Example, From Geeks To Geeks.