Problem with a simple RMI program

I'm trying to get a simple RMI program to work, by following the instructions in this link:
http://developer.java.sun.com/developer/technicalArticles/RMI/CreatingApps/index.html#dro
When it gets to this line:
Lookup look_obj = (Lookup)Naming.lookup(name);this exception is generated:
java.security.AccessControlException: access denied (java.net.SocketPermission 127.0.0.1:1099 connect,resolve)
What's wrong, eh?

Canadian, eh?
Looks like your security settings on you computer are set to not allow a socket connection.
Specifically is is saying that access to port 1099 on your local machine (127.0.0.1 is the loopback address) is being denied.
There are two main reasons this could happen (off the top of my head), though someone else might know from the message exaclty which one.
1. Your java security permissions do not allow an out going socket connection (are you writing an applet?)
2. Your computer protects access to port 1099.

Similar Messages

Problem with a SIMPLE SaveDialog program.. Did I found a Java bug?

When I run the follower program:
     /** Dialog test */
     public static void main(String args[]) {
          JFileChooser fileChooser = new JFileChooser(new File("Sem nome"));
          fileChooser.addChoosableFileFilter(new JLFileFilter());
          // mostra saveDialog
          int returnVal = fileChooser.showSaveDialog(App.getJFrame());
          // Se confirmado..
          if (returnVal == JFileChooser.APPROVE_OPTION) {
               System.out.println("OK!");
          } else {
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     }it runs ok, but if I run on Eclipse's Debug Mode, I can't see the files and folders on my docs folder in the dialog... why??
I'm running Windows XP SP3 with JDK6update4
Edited by: wellington7 on Aug 13, 2008 11:35 AM
Edited by: wellington7 on Aug 14, 2008 7:30 AM

Hmmm, not really. Since a Table (ie MyTable) would be part of a larger whole (like inside a JFrame) Only the program that puts all those elements together has to be lunched on the EDT because everything inside that program would, by default, be created there as well.
public class MyProgram {
     public MyProgram() {
          //all of these will be created on EDT because MyProgram is created there.
          JFrame f = new JFrame();
          JButton b = new JButton("hi");
          JTextField t = new JTextField();
          MyTable tbl = new MyTable();
          //place items on Frame
          f.add(t, BorderLayout.NORTH);
          f.add(b, BorderLayout.CENTER);
          f.add(tbl, BorderLayout.SOUTH);
          //show the window
          f.setVisible(true);
          f.pack();
      * @param args
     public static void main(String[] args) {
          //create MyProgram on EDT
          SwingUtilities.invokeLater(new Runnable() {
               public void run() {
                    new MyProgram();
}Only the items created, explicitly, inside the main method would need to be created on the EDT.
-D-

Problems with a simple stop watch program

I would appreciate help sorting out a problem with a simple stop watch program. The problem is that it throws up inappropriate values. For example, the first time I ran it today it showed the best time at 19 seconds before the actual time had reached 2 seconds. I restarted the program and it ran correctly until about the thirtieth time I started it again when it was going okay until the display suddenly changed to something like '-50:31:30:50-'. I don't have screenshot because I had twenty thirteen year olds suddenly yelling at me that it was wrong. I clicked 'Stop' and then 'Start' again and it ran correctly.
I have posted the whole code (minus the GUI section) because I want you to see that the program is very, very simple. I can't see where it could go wrong. I would appreciate any hints.
public class StopWatch extends javax.swing.JFrame implements Runnable {
    int startTime, stopTime, totalTime, bestTime;
    private volatile Thread myThread = null;
    /** Creates new form StopWatch */
    public StopWatch() {
     startTime = 0;
     stopTime = 0;
     totalTime = 0;
     bestTime = 0;
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    public void run() {
     Thread thisThread = Thread.currentThread();
     while(myThread == thisThread) {
         try {
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     if(myThread == null) {
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    public void getStart() {
     Calendar now = Calendar.getInstance();
     startTime = (now.get(Calendar.MINUTE) * 60) + now.get(Calendar.SECOND);
    public void getEnd() {
     Calendar now1 = Calendar.getInstance();
     stopTime = (now1.get(Calendar.MINUTE) * 60) + now1.get(Calendar.SECOND);
     totalTime = stopTime - startTime;
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         jLabel1.setText(""+totalTime/60+ ":0"+(totalTime % 60));
     } else {
         jLabel1.setText(""+totalTime/60 + ":"+(totalTime % 60));
     if((bestTime % 60) < 10) {
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     JButton temp = (JButton) evt.getSource();
     if(temp.equals(jButton1)) {
         start();
         getStart();
     if(temp.equals(jButton2)) {
         getEnd();
         myThread = null;
     * @param args the command line arguments
    public static void main(String args[]) {
     java.awt.EventQueue.invokeLater(new Runnable() {
         public void run() {
          new StopWatch().setVisible(true);
    // Variables declaration - do not modify
    private javax.swing.JButton jButton1;
    private javax.swing.JButton jButton2;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JLabel jLabel2;
    private javax.swing.JLabel jLabel3;
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}

Although I appreciate this information, it still doesn't actually solve the problem. I can't see an error in the logic (or the code). The fact that the formatting works most of the time suggests that the problem does not lie there. As well, I use the same basic code for other time related displays e.g. countdown timers where the user sets a maximum time and the computer stops when zero is reached. I haven't had an error is these programs.
For me, it is such a simple program and the room for errors seem small. I am guessing that I have misunderstood something about dates, but I obviously don't know.
Again, thank you for taking the time to look at the problem and post a reply.

Problem with a simple GRE tunnel

Hello everyone:
I have a problem with a simple GRE tunnel, and can not make it work, the problem lies in the instruction "tunnel source loopback-0" if I use this command does not work, now if I use "tunnel source <ip wan >" if it works, someone can tell me why?
Thanks for your help
Router 1: 2811
version 12.4
no service password-encryption
hostname cisco2811
no aaa new-model
ip cef
interface Loopback0
ip address 2.2.2.2 255.255.255.255
interface Tunnel0
ip address 10.10.1.1 255.255.255.0
tunnel source Loopback0
tunnel destination 217.127.XXX.188
interface Tunnel1
ip address 10.10.2.1 255.255.255.0
tunnel source Loopback0
tunnel destination 80.32.XXX.125
interface FastEthernet0/0
description LOCAL LAN Interface
ip address 192.168.1.254 255.255.255.0
ip nat inside
ip virtual-reassembly
duplex auto
speed auto
interface FastEthernet0/1
description WAN Interface
ip address 195.77.XXX.70 255.255.255.248
ip nat outside
ip virtual-reassembly
duplex auto
speed auto
ip forward-protocol nd
ip route 0.0.0.0 0.0.0.0 195.77.XXX.65
ip route 192.168.3.0 255.255.255.0 Tunnel0
ip route 192.168.4.0 255.255.255.0 Tunnel1
ip nat inside source route-map salida-fibra interface FastEthernet0/1 overload
access-list 120 deny ip 192.168.1.0 0.0.0.255 192.168.3.0 0.0.0.255
access-list 120 deny ip 192.168.1.0 0.0.0.255 192.168.4.0 0.0.0.255
access-list 120 permit ip 192.168.1.0 0.0.0.255 any
route-map salida-fibra permit 10
match ip address 120
Router 2: 2811
version 12.4
service password-encryption
ip cef
no ip domain lookup
multilink bundle-name authenticated
username admin privilege 15 password 7 104CXXXXx13
interface Loopback0
ip address 4.4.4.4 255.255.255.255
interface Tunnel0
ip address 10.10.1.2 255.255.255.0
tunnel source Loopback0
tunnel destination 195.77.XXX.70
interface Ethernet0
ip address 192.168.3.251 255.255.255.0
ip nat inside
ip virtual-reassembly
hold-queue 100 out
interface ATM0
no ip address
no ip route-cache cef
no ip route-cache
no atm ilmi-keepalive
dsl operating-mode auto
interface ATM0.1 point-to-point
ip address 217.127.XXX.188 255.255.255.192
ip nat outside
ip virtual-reassembly
no ip route-cache
no snmp trap link-status
pvc 8/32
encapsulation aal5snap
ip route 0.0.0.0 0.0.0.0 ATM0.1
ip route 192.168.1.0 255.255.255.0 Tunnel0
ip nat inside source route-map nonat interface ATM0.1 overload
access-list 100 permit ip 192.168.3.0 0.0.0.255 192.168.1.0 0.0.0.255
access-list 120 deny ip 192.168.3.0 0.0.0.255 192.168.1.0 0.0.0.255
access-list 120 permit ip 192.168.3.0 0.0.0.255 any
route-map nonat permit 10
match ip address 120

Hello, thank you for the answer, as to your question, I have no connectivity within the tunnel, whether from Router 1, I ping 10.10.1.2 not get response ...
Now both routers remove the loopback, and the interface tunnel 0 change the tunnel source to "tunnel source " tunnel works perfectly, the problem is when I have to use the loopback. Unfortunately achieved when the tunnel work, this will have to endure multicast, and all the examples found carrying a loopback as' source '... but this is a step back ..
Tunnel0 is up, line protocol is up
Hardware is Tunnel
Internet address is 10.10.1.1/24
MTU 1514 bytes, BW 9 Kbit, DLY 500000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation TUNNEL, loopback not set
Keepalive not set
Tunnel source 2.2.2.2 (Loopback0), destination 217.127.XXX.188
Tunnel protocol/transport GRE/IP
Key disabled, sequencing disabled
Checksumming of packets disabled
Tunnel TTL 255
Fast tunneling enabled
Tunnel transmit bandwidth 8000 (kbps)
Tunnel receive bandwidth 8000 (kbps)
Last input 09:04:38, output 00:00:19, output hang never
Last clearing of "show interface" counters never
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/0 (size/max)
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
0 packets input, 0 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
11101 packets output, 773420 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 unknown protocol drops
0 output buffer failures, 0 output buffers swapped out

Problems running a simple RMI

Hi there,
I have had alot of problems running a small RMI program.
It has now boiled down to a java.lang.NoClassDefFoundError
when i try to use my policy file.
The program complies, when i run javac *.java
It also creates the stub, when i run rmic.
I have trawled alot of forums and the closest answer i got was "add your classpath".
As im a student of java, this does not really tell me much.
The class/java files are in
C:\Documents and Settings\MONDARIZ\workspace\RmiHello\server
The policy file is also in the folder.
I must add, that the program is from an example, so i would not think there is any coding errors.
Also when i run it en eclipse, i get "Hello server failed: java.security.AccessControlException: access denied (java.net.SocketPermission 127.0.0.1:1099 connect,resolve)"
So it seems something is running.

The answer you found is correct. Java needs to know where to find the class files for execution.
For starters, use the environment variable CLASSPATH. Set the value to:
C:\Documents and Settings\MONDARIZ\workspace\RmiHello\server
This way whatever you run (RMI Registry, Server, Client) has the proper class path. When you get everything running ok, then you can look into other methods of specifying where the class files are found.
Eclipse, as well as command line Java starts, need to find the policy file. Set up this:
-Djava.security.policy=C:\Documents and Settings\MONDARIZ\workspace\RmiHello\server\your_policy_file.xxx

Problem with RFC connection - tp program not registered

Hello everyone
recently there has appeared a problem with the RFC connection on our system - we received the following set of messages:
Trace file opened at 20101221 130738 Central European Standard Time, SAP-RE
======> CPIC-CALL: 'ThSAPOCMINIT' : cmRc=2 thRc=679
Tp program is not registered.
ABAP Programm: RSRFCPIN (Transaction: SM59)
User: xxx(Client: 100)
Destination: SIDRFC_IFSAPHRCZPKCP (handle: 2, , )
Error RFCIO_ERROR_SYSERROR in abrfcpic.c : 1501
CPIC-CALL: 'ThSAPOCMINIT' : cmRc=2 thRc=679
Program transakcji nie jest zarejestrowany
DEST =SIDRFC_IFSAPHRCZPKCP
HOST =%%RFCSERVER%%
PROG =IFCZPKCP
GWHOST =ssapprod
GWSERV =sapgw21
I tried to register program with a command:
rfcexec -aIFCZPKCP -gssapprod -xsapgw21
but with no success - the program didn't appear on the list of logged clients on the system in gateway monitor. Frankly speaking we do not know now what else we can do - please help!
We have ECC 6.0 (SAP_BASIS 700 SP18) on Windows Server 2003 R2 x64.
Thanks in advance for any help.
Regards
Peter

Hi Salim
thanks for your reply.
./rfcexec -a(PROG_ID) -gssapprod -xsapgw21 &
The syntax you're providing refers to UNIX systems, but I did similar thing on our Windows system - I tried all of the following methods (unfortunatelly without success):
rfcexec -a(PROG_ID) -gssapprod -xsapgw21
full_path_to_rfcexec.exe -a(PROG_ID) -gssapprod -xsapgw21
rfcexec -a(PROG_ID) -gssapprod.domain -xsapgw21
full_path_to_rfcexec.exe -a(PROG_ID) -gssapprod.domain -xsapgw21
Can you advise me what to do now?
Thanks
Piotr

I have a little problem with input in my program...(System.in, BufferedRead

I'm coding a program that takes a input like this :
Sample Input
1 11 5
2 6 7
3 13 9
12 7 16
14 3 25
19 18 22
23 13 29
24 4 28
So I wrote a code like this :
public static void main(String[] args) throws Exception{
          BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
          String input = null;
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               int leftX = Integer.parseInt(st.nextToken());
               int height = Integer.parseInt(st .nextToken());
               int rightX = Integer.parseInt(st.nextToken());
.... rest of the code....
But unlike I expected, the program did not pass the while loop.
When I observed in debugging mode, when "br.readLine()" has no more strings to read,
the whole program just becomes idle doing nothing, and it does not proceed further.
Is there any problem with my code there? I've been trying to figure it out for hours... Please help!!!

myunghajang wrote:
Why doesn't it work in a way I intended? BufferedReader returns null if there is no more string to read, and what's the problem?
It's so frustrating...The computer doesn't have a mind reading input, how is your program supposed to know you have finished typing the input?
If you put the data in a file and redirect it into your program on the command line it will work (because the file knows where its end is)
Your program could instead assume that a blank line is you end of input.

Problem while executing simple java program

Hi
while trying to execute a simple java program,i am getting the following exception...
please help me in this
java program :import java.util.*;
import java.util.logging.*;
public class Jump implements Runnable{
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    String dbURL, dbuser, dbpasswd, loggerDir;
    int idleSleep;
    static Logger logger = Logger.getAnonymousLogger();
    Thread myThread = null;
    JumpQueueManager manager = null;
    private final static String VERSION = "2.92";
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        dbURL = jdbcURL;
        dbuser = user;
        dbpasswd = pwd;
        this.idleSleep = idleSleep;
        manager = new JumpQueueManager(dbURL, dbuser, dbpasswd);
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        Handler hndl = new pl.com.sony.utils.SimpleLoggerHandler();
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            filehndl.setLevel(Level.INFO);
            logger.addHandler(filehndl);
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        logger.setUseParentHandlers(false);
        logger.addHandler(hndl);
        logger.setLevel(Level.FINE);
        logger.info("LOGGING FACILITY IS READY !");
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        proc.setLogger(logger);
        proc.setJumpRef(this);
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                        if(task!=null)
                            processTask(task);
                    while(task!=null);
                catch(Exception e){
                    logger.severe(e.getMessage());
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            try{
                if(!myThread.interrupted())
                    myThread.sleep(60*1000*idleSleep);
            catch(InterruptedException e){
                logger.fine("-------->Wakeing up !!!");
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        myThread = t;
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        processQueue();
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    public void updateOraTaskStatus(QueueTask task, boolean success){
        try{
            manager.updateOraTaskStatus(task, success);
        catch(Exception e){
            logger.severe("Cannot update status of task table for task:" + task.getID() + "\nReason: " + e.getMessage());
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     *Processor class calls this method to execute stored proc and it doesn't
     *take care about any SQL related issues including exceptions
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        try{
            manager.executeStoredProc(proc);
        catch(Exception e){
            //logger.severe("Cannot execute stored procedure:"+ proc + "\nReason: " + e.getMessage());
            throw e;
     *This method is only to hide QueueManager object from access from JumpProcessors
     *It handles exceptions and datbase connecting/disconnecting and is called from
     *JumpProceesor thread.
    public void updateTaskStatus(int taskID, int status){
        try{
            manager.updateTaskStatus(taskID, status);
        catch(Exception e){
            logger.severe("Cannot update status of task: " + taskID + " to " + status + "\nReason: " + e.getMessage());
    public java.sql.Connection getDBConnection(){
        try{
            return manager.getNewConnection();
        catch(Exception e){
            logger.severe("Cannot acquire new database connection: " + e.getMessage());
            return null;
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            activeQueues.put(new Integer(task.getQueueNum()), JumpConstants.TH_STAT_BUSY);
        else{
            activeQueues.remove(new Integer(task.getQueueNum()));
    public static void main(String[] args){
             try{
         System.out.println("The length-->"+args.length);
        System.out.println("It's " + new java.util.Date() + " now, have a good time.");
        if(args.length<5){
            System.out.println("More parameters needed:");
            System.out.println("1 - JDBC strign, 2 - DB User, 3 - DB Password, 4 - sleeping time (minutes), 5 - log file dir");
            return;
        Jump jump = new Jump(args[0], args[1], args[2], Integer.parseInt(args[3]), args[4]);
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        jump.setMyThread(t1);
        t1.start();}
             catch(Exception e){
                  e.printStackTrace();
} The exception i am getting is
java.lang.NoClassDefFoundError: jdbc:oracle:thin:@localhost:1521:xe
Exception in thread "main" ERROR: JDWP Unable to get JNI 1.2 environment, jvm->GetEnv() return code = -2
JDWP exit error AGENT_ERROR_NO_JNI_ENV(183): [../../../src/share/back/util.c:820] Please help me.....
Thanks in advance.....sathya

I am not willing to wade through the code, but this portion makes me conjecture your using an Oracle connect string instead of a class name.
java.lang.NoClassDefFoundError: jdbc:oracle:thin:@localhost:1521:xe

When Place Image in Photoshop, error msg: 'Problem with Photoshop CS6 caused program to stop working

When I 'Place Image' in Photoshop, the following error msg comes up: 'A Problem with Photoshop CS6 has caused the program to stop working, close programme?'
Do I need to adjust my set-up to run this? The PC operates on a 32-bit system/Windows 6.

You need to provide much more info: What files are you trying to place into what document? What are the document sizes, resolution, color mode etc.? Anything else we should know about? This could be a million things from color profile issues to color space mismatches to the files to be placed being damaged or badly structured or a importer module being broken. Also provide exact system info and crash logs:
Working with your Operating System’s Tools
Mylenium

Help with a simple Java program

I'm making a sort of very simple quiz program with Java. I've got everything working on the input/output side of things, and I'm looking to just fancy everything up a little bit. This program is extremely simple, and is just being run through the Windows command prompt. I was wondering how exactly to go about making it to where the quiz taker was forced to hit the enter key after answering the question and getting feedback. Right now, once the question is answered the next question is immediately asked, and it looks kind of tacky. Thanks in advance for your help.

Hmm.. thats not quite what I was looking for, I don't think. Here's an example of my program.
class P1 {
public static void main(String args[]) {
boolean Correct;
char Selection;
int number;
Correct = false;
System.out.println("Welcome to Trivia!\n");
System.out.println("Who was the first UF to win the Heisman Trophy?\n");
System.out.print("A) Danny Wuerffel\nB) Steve Spurrier\nC) Emmit Smith\n");
Selection = UserInput.readChar();
if(Selection == 'B' | Selection == 'b')
Correct = true;
if(Correct == true)
System.out.println("\nYou have entered the correct response.");
else
System.out.println("\nYou missed it, better luck next time.");
System.out.println("(\nHit enter for the next question...");
System.in.readLine();
Correct = false;
System.out.println("\nWhat year did UF win the NCAA Football National Championship?\n");
number = UserInput.readInt();
if(number == 1996)
Correct = true;
if(Correct == true)
System.out.println("\nYou have entered the correct response.");
else
System.out.println("\nYou missed it, better luck next time.");
Correct = false;
System.out.println("\nWho is the President of the University of Florida?\n");
System.out.println("A) Bernie Machen\nB) John Lombardi\nC) Stephen C. O'Connell\n");
Selection = UserInput.readChar();
if(Selection == 'A' | Selection == 'a')
Correct = true;
if(Correct == true)
System.out.println("\nYou have entered the correct response.");
else
System.out.println("\nYou missed it, better luck next time.");
}

Problem with servlet and application program

i have this error appearing in my browser...
i have this feeling it is about the application, but if application alone, i now having some trouble running it, once i bind it with an applet i always have this message:
HTTP Status 500 -
type Exception report
message
description The server encountered an internal error () that prevented it from fulfilling this request.
exception
java.lang.NullPointerException
     exString.triming(exString.java:12)
     exString.geta(exString.java:113)
     forplay.play(forplay.java:9)
     textServe.doGet(textServe.java:14)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
     org.apache.catalina.servlets.InvokerServlet.serveRequest(InvokerServlet.java:419)
     org.apache.catalina.servlets.InvokerServlet.doGet(InvokerServlet.java:133)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
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i know this is a simple problem...
how come my application is having some difficulty in running my application...
this servlet by the way is a get parameter base...

Its caused cuz ur exString is null..
rgds
shanu

Got a problem with my Chatting-Room program, please help me if you can.

There is one bug in the code (should be just one), but I couldn't find it, I even recoded the whole thing, after I recoded the code, the same problem seems still there. I just can't find where the problem is. So I hope someone here can help me, thank you very much.
First, I made a Server and a Client. Server has 5 classes, and Client has 2 classes. My intention is that all the clients(running on other computers) will connect to the server (which is my laptop), and then they can communicate with each other. For example, if person A typed "Hello", person B and person C's computers will receive this message and display it.
The problem is that several clients can connect to the server (My laptop), but if one person type something, other people won't receive the message, it's blank on their screens. Maybe there is a problem when server receiving the message. So this is the problem I want to solve.
I have the code down there, here is a brife description what each class mainly does.
First class of Server is for connecting client, this class is named Server. Everytime a client is connected, the Server class calls the second class to store the client's information (which is its IP address), the second class is named People.
Third class is named Receiver, it is for receiving the massage from any one of the clients, then stores the message to a static field variable in Fourth class, fourth class is named Saying.
Fifth class of Server is named Sender, it is for sending the massage to the client, that message is the one that stored in Saying.
The First class of client is named Client, it prints any message that the server send to it.
The Second class of client is named SendFromClient, it wait for user to type something, and then send the message to the server, so server's Receiver class hopefully will get it and store it to the field variable in the Saying class.
Here is all the codes:
Server Class:
import java.net.*;
import java.io.*;
import java.util.*;
public class Server
     public static void main(String[] args)
          /*port number*/
          final int port = 41333;
          /*welcome messages:*/
          System.out.println("This is FriendlyJ 1.0 running");
          System.out.println("Listening on ports 41333");
          try
               /*Clear the ArrayList*/
               People clear = new People();
               clear.IPs.clear();
               /*Create a server socket that will accept any connection on this port*/
               ServerSocket ss = new ServerSocket(port);
               /*keep getting clients*/
               while(true)
                    /*connect with one client at a time*/
                    Socket s = ss.accept();
                    PrintWriter out = new PrintWriter(s.getOutputStream(),true);
                    Scanner in = new Scanner(s.getInputStream());
                    /*indicate one establish of connection*/
                    System.out.println("One connection estabolished!");
                    /*two classes, one foe receiving, one for sending*/
                    Receiver receive = new Receiver(in);
                    Thread ty = new Thread(receive);
                    Sender send = new Sender(out, s);
                    Thread yt = new Thread(send);
                    ty.start();
                    yt.start();
                    /*add IP to ArrayList*/
                    clear.storing(s.getInetAddress().toString());
                    out.println("There are " + clear.IPs.size() + " people online;");
                    System.out.println("Connected to " + s.getInetAddress().toString());
          catch (Exception e)
               System.out.println("System exception");
}People Class:
import java.util.*;
public class People
     ArrayList<String> IPs = new ArrayList<String>();
     /*A method for storing IPs*/
     public void storing(String IP)
          IPs.add(IP);
}Receiver Class:
import java.util.*;
public class Receiver implements Runnable
     final private Scanner in;
     /*Constructor to get the scanner*/
     public Receiver(Scanner abc)
          in = abc;
     public void run()
          Saying say = new Saying();
          try
               while(true)
                    /*waiting for input from client, then give it to Saying*/
                    say.setSaying(in.nextLine());
          catch (Exception e)
               e.printStackTrace();
}Saying Class:
public class Saying
     static String saying = "";
     public void setSaying(String a)
          saying = a;
     public String getSaying()
          return saying;
     public void resetSaying()
          saying = "";
     public int getlength()
          return saying.length();
}Sender Class:
import java.io.*;
import java.net.*;
public class Sender implements Runnable
     final private PrintWriter out;
     final private Socket s;
     public Sender(PrintWriter abcd, Socket abcde)
          out = abcd;
          s = abcde;
     public void run()
          out.println("Feel free to chat.");
          int count;
          Saying says = new Saying();
          try
          while(!s.isClosed())
               count = says.getlength();
               if(count>0)
                    out.println(says.getSaying());
                    says.resetSaying();
          /*disconnect with the client*/
          s.close();
          System.out.println("Connection with " + s.getInetAddress().toString() + " is closed.");
          catch (IOException e)
               System.out.println("Network error!");
}Client Class:
import java.util.*;
import java.net.*;
import java.io.*;
public class Client
     public static void main(String[] args)
          Socket sc;
          System.out.println("Welcome to FriendlyJ IM program");
          System.out.println("Connecting to the server...");
          int port = 41333;
          /*A variable for storing IP address of Server*/
          InetAddress ip;
          try
               ip = InetAddress.getByName("192.168.1.68");
               sc = new Socket(ip, port);
               System.out.println("Connected with Server");
               Scanner in = new Scanner(sc.getInputStream());
               PrintWriter out = new PrintWriter(sc.getOutputStream());
               /*a thread for sending message to the server*/
               sendFromClient sendin = new sendFromClient(out);
               Thread sending = new Thread(sendin);
               sending.start();
               /*display welcome message*/
               System.out.println(in.nextLine());
               /*displaying how many people are online now*/
               System.out.println(in.nextLine());
               while(true)
                    /*print out the message sent by the server*/
                    System.out.println(in.nextLine());
          catch(UnknownHostException e)
               System.out.println("Couldn't find the host!");
          catch(IOException e)
               System.out.println("Network error!");
          catch (Exception e)
               e.printStackTrace();
}SendFromClient Class:
import java.io.*;
import java.util.*;
public class sendFromClient implements Runnable
     private PrintWriter send;
     public sendFromClient(PrintWriter sendto)
          send = sendto;
     public void run()
          Scanner sc = new Scanner(System.in);
          while(true)
               /*get a message, then send to the server*/
               send.println(sc.nextLine());
That's all, thank you for helping!
Edited by: stdioJ on Oct 31, 2007 3:58 PM

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