Applet not opening a socket on its own host. Please help.

Question

I have also posted this in JSC2 forum.
My applet is not able to open a socket on its own host.
The applet is being served by a JSP (developed using Sun Creator2) from my laptop behind a DHCP broadband router at (say) 125.238.104.132 at my residence. I have a URL �samsub.no-ip.biz� that redirects port 80 calls to 29080 where my application runs. All required router rules/mapping are done and the JSPs run perfectly fine. In one of the pages, I have inserted an applet inside an escape disabled statictext field as follows:
<applet code="AppClient.class" width=540 height=440></applet>
The applet code and the test server code are shown below for your analysis. Note that, when run on the same machine (at home), the applet works fine. The commented lines will show other failed test. The error reported at the java console was: null pointer at line 56
Could someone help me please. Thanx. MarySam
The applet code
1     import java.util.*;          
2     import java.awt.*;          
3     import java.applet.*;          
4     import java.text.*;          
5     import javax.swing.*;          
6     import com.sun.java.swing.plaf.windows.*;          
7     import java.awt.event.*;          
8     import java.net.*;          
9               
10     public class AppClient extends Applet {          
11     JInternalFrame jif;          
12     JTextArea jta1, jta2;          
13     Socket kkSocket = null;          
14               
15     public void init() {          
16          try {     
17               LookAndFeel lf = new WindowsLookAndFeel();
18               UIManager.setLookAndFeel(lf);
19          kkSocket = new Socket("125.238.104.132", 4444);
          //kkSocket = new Socket("samsub.no-ip.biz", 4444);
          //kkSocket = new Socket("125.238.104.132:29080", 4444);
          //kkSocket = new Socket("samsub.no-ip.biz:29080", 4444);
20          }      catch(Exception e) {}
21               
22          setLayout(null);      
23          setBackground(Color.black);     
24          jif = new JInternalFrame();     
25          jif.setLocation(20,20);     
26          jif.setSize(500,400);     
27          Container con1 = jif.getContentPane();     
28          con1.setLayout(null);     
29               
30          jta1 = new JTextArea();      
31          JScrollPane jcp1 = new JScrollPane(jta1);     
32          jcp1.setBounds(10,10,410,100);     
33          con1.add(jcp1);     
34               
35          jta2 = new JTextArea();     
36          JScrollPane jcp2 = new JScrollPane(jta2);     
37          jcp2.setBounds(10,115,470,245);     
38          con1.add(jcp2);      
39               
40          JButton jb = new JButton("Go");     
41          jb.setBounds(425,10,60,30);     
42          jb.addActionListener(this);     
43          con1.add(jb);      
44               
45          JLabel jlb = new JLabel();     
46          jlb.setOpaque(true);     
47          jlb.setBackground(Color.gray);     
48          jlb.setForeground(Color.white);      
49          jlb.setBounds(425,50,60,30);     
50          con1.add(jlb);      
51               
52               
53          jif.setVisible(true);     
54          add(jif);      
55          //jta2.setText(getCodeBase().toString());     
56          jta2.setText(kkSocket.getInetAddress().toString());     
57               
58     }          
59               
60     public void start() {}          
61               
62     public void stop() {}          
63               
64               
65     }          
66               
67               
The test server Code
1     import java.net.*;                         
2     import java.io.*;                         
3                              
4     public class MyServer {                         
5     public static void main(String[] args) throws IOException {               
6                              
7     ServerSocket serverSocket = null;                    
8     try {                         
9     serverSocket = new ServerSocket(4444);                    
10     } catch (IOException e) {                         
11     System.err.println("Could not listen on port: 4444.");          
12     System.exit(1);                         
13     }                         
14                              
15     Socket clientSocket = null;                         
16     try {                         
17     clientSocket = serverSocket.accept();                    
18     System.out.println(clientSocket.getInetAddress().toString());          
19     } catch (IOException e) {                         
20     System.err.println("Accept failed.");                    
21     System.exit(1);                         
22     }                         
23                              
24     clientSocket.close();                         
25     serverSocket.close();                         
26     }                         
27     }                         
28                              
29

Answer 1

Hi Guys,
I'm not actually from Mozilla Firefox, but I've had this problem before, and I've solved it with the help from another website.
What you need to do is download a programme called "tdsskiller" from here:
http://www.geekpolice.net/t23369-computer-infected
scroll down the page and you should see a link. (I know the article itself seems irrelevant to your problem, but trust me, the programme they recommend works on this virus too.) It's only 1.3MB or so, so it doesn't take up huge amounts of space either! :)
I can safely say that it is COMPLETELY safe to download this from geekpolice.net, as this website is a free website which helps people with viruses on their computer. If you ever have another problem with anything to do with computers, go and have a look on geekpolice.net, they should have something that might help you.
Before anyone wonders why I am singing its praises so much, no I am not advertising them for any personal gain, but they have helped me get rid of some pretty nasty viruses on my computer before, so I am very grateful to them :)
SO, anyway, after you've downloaded the tdsskiller, you should run it, and it may find some infected files, in which case let it repair them. After rebooting your computer, the annoying opening tab thing should be gone!
I hope this works for anyone who's stuck :) If it doesn't, I'm really sorry, but it has definately worked for me!
Good luck!
Yashmeee :)