ReadLine problem

I have a problem in JDeveloper 3.2.3, using Java 1.3.1-02, usin this code:
<Start code>
import java.io.*;
import java.util.*;
public class test {
static DataInputStream kbd = new DataInputStream(System.in) ;
public static void main(String[] args) throws IOException
String temp = "" ;
System.out.println("Simple Java Isql.\n");
System.out.print("Enter something or [ENTER] : ");
System.out.flush();
temp = kbd.readLine();
public test (){
<End code>
This compiles with warning on line 15 (deprecated).
When run it gives:
"F:\Program Files\JDeveloper 3.2.3\jdk1.3.1_02\jre\bin\javaw.exe" -mx50m -classpath "F:\Program Files\JDeveloper 3.2.3\myclasses;F:\Program Files\JDeveloper 3.2.3\lib\jdev-rt.zip;F:\Program Files\JDeveloper 3.2.3\jdbc\lib\oracle8.1.7\classes12.zip;F:\Program Files\JDeveloper 3.2.3\lib\connectionmanager.zip;F:\Program Files\JDeveloper 3.2.3\jdk1.3.1_02\lib\dt.jar;F:\Program Files\JDeveloper 3.2.3\jdk1.3.1_02\jre\lib\rt.jar;F:\Program Files\JDeveloper 3.2.3\jdk1.3.1_02\jre\lib\i18n.jar" test
Simple Java Isql.
Enter something or [ENTER] : java.io.IOException: The handle is invalid
     at java.io.FileInputStream.readBytes(Native Method)
     at java.io.FileInputStream.read(FileInputStream.java:183)
     at java.io.BufferedInputStream.fill(BufferedInputStream.java:186)
     at java.io.BufferedInputStream.read(BufferedInputStream.java:204)
     at java.io.DataInputStream.readLine(DataInputStream.java:449)
     at test.main(test.java:15)
Exception in thread "main"
If deprecation is handled according manual:
static DataInputStream kbd = new DataInputStream(System.in) ;
replaced with:
static BufferedReader kbd
= new BufferedReader(new InputStreamReader(System.in)) ;
it compiles without error or warning.
Running it shows:
"F:\Program Files\JDeveloper 3.2.3\jdk1.3.1_02\jre\bin\javaw.exe" -mx50m -classpath "F:\Program Files\JDeveloper 3.2.3\myclasses;F:\Program Files\JDeveloper 3.2.3\lib\jdev-rt.zip;F:\Program Files\JDeveloper 3.2.3\jdbc\lib\oracle8.1.7\classes12.zip;F:\Program Files\JDeveloper 3.2.3\lib\connectionmanager.zip;F:\Program Files\JDeveloper 3.2.3\jdk1.3.1_02\lib\dt.jar;F:\Program Files\JDeveloper 3.2.3\jdk1.3.1_02\jre\lib\rt.jar;F:\Program Files\JDeveloper 3.2.3\jdk1.3.1_02\jre\lib\i18n.jar" test
Simple Java Isql.
Enter something or [ENTER] : java.io.IOException: The handle is invalid
     at java.io.FileInputStream.readBytes(Native Method)
     at java.io.FileInputStream.read(FileInputStream.java:183)
     at java.io.BufferedInputStream.read1(BufferedInputStream.java:223)
     at java.io.BufferedInputStream.read(BufferedInputStream.java:280)
     at java.io.FilterInputStream.read(FilterInputStream.java:93)
     at java.io.InputStreamReader.fill(InputStreamReader.java:173)
     at java.io.InputStreamReader.read(InputStreamReader.java:249)
     at java.io.BufferedReader.fill(BufferedReader.java:139)
     at java.io.BufferedReader.readLine(BufferedReader.java:299)
     at java.io.BufferedReader.readLine(BufferedReader.java:362)
     at test.main(test.java:16)
Exception in thread "main"
The same happens using java 1.2.2: (same code):
Exception in thread "main"
"F:\Program Files\JDeveloper 3.2.3\java1.2\jre\bin\javaw.exe" -mx50m -classpath "F:\Program Files\JDeveloper 3.2.3\myclasses;F:\Program Files\JDeveloper 3.2.3\lib\jdev-rt.zip;F:\Program Files\JDeveloper 3.2.3\jdbc\lib\oracle8.1.7\classes12.zip;F:\Program Files\JDeveloper 3.2.3\lib\connectionmanager.zip;F:\Program Files\JDeveloper 3.2.3\java1.2\jre\lib\rt.jar" test
Simple Java Isql.
Enter something or [ENTER] : java.io.IOException: The handle is invalid.
     java.lang.String java.io.BufferedReader.readLine(boolean)
     java.lang.String java.io.BufferedReader.readLine()
     void test.main(java.lang.String[])
Exception in thread main
and in java 1.1.8:
"F:\Program Files\JDeveloper 3.2.3\java\bin\javaw.exe" -mx50m -classpath "F:\Program Files\JDeveloper 3.2.3\myclasses;F:\Program Files\JDeveloper 3.2.3\lib\jdev-rt.zip;F:\Program Files\JDeveloper 3.2.3\jdbc\lib\oracle8.1.7\classes111.zip;F:\Program Files\JDeveloper 3.2.3\lib\connectionmanager.zip;F:\Program Files\JDeveloper 3.2.3\java\lib\classes.zip" test
Simple Java Isql.
Enter something or [ENTER] :
java.io.IOException: read error
     at java.io.FileInputStream.read(FileInputStream.java:158)
     at java.io.BufferedInputStream.read(BufferedInputStream.java:193)
     at java.io.FilterInputStream.read(FilterInputStream.java:101)
     at java.io.InputStreamReader.fill(InputStreamReader.java:158)
     at java.io.InputStreamReader.read(InputStreamReader.java:229)
     at java.io.BufferedReader.fill(BufferedReader.java:136)
     at java.io.BufferedReader.readLine(BufferedReader.java:224)
     at test.main(test.java:16)
Same applies to this (more minimized) code (found elsewhere):
<start code>
import java.io.*;
import java.util.*;
public class test2 {
public static void main(String[] args) throws IOException {
try {
BufferedReader reader=new BufferedReader(new InputStreamReader(System.in));
          String s=reader.readLine();
     if(s==null) {
               System.out.println("Error: reached end of file!");
               System.exit(1);
          System.out.println("You typed:"+s);
     } catch(IOException e) {
     System.out.println("Could not read line: "+e);
<end code>
Colleagues tried this as well but got the same error.
Using other IDE runs this code without problem.
What can be wrong?

Hey ,
Please avoid to use any proprietary editor if u are using for coding java which facilate coding and execution enviornment also (e.g. JCreator )
Use simple notepad and run it on cosole.
I have tried it 2 ways
with editor it gives same problem as u stated.
and
when used with normal nitepad and console it working okey

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     public static void obtainStable(String stable)
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     public static void obtainRating(int rating)
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          rating = Integer.parseInt(input.readLine());
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               System.out.println("Error! Rating should be between 20 and 110");
               //using mastery factor - recursion - to allow the user to input the rating again
               obtainRating(rating);
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     public static void obtainRace(int race)
          System.out.println("Race number: ");
          race = Integer.parseInt(input.readLine());
          //using if...else
          if ( (race >= 11) && (race <= 308) )
               //do nothing
          else
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               System.out.println("Error! Race number should 11 and 308");
               //using mastery factor - recursion - to allow the user to input the rating again
               obtainRace(race);
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     **Validation rule: comparison check
     **Distance can either be 1365, 1400, 1500, 1600, 1800, 2000, 2200, 2400
     public static void obtainDistance(int distance)
          System.out.println("Distance: ");
          distance = Integer.parseInt(input.readLine());
          //using if...else
          if ( (distance == 1365) || (distance == 1400) || (distance == 1500) || (distance == 1600) || (distance == 1800) || (distance == 2000) || (distance == 2200) || (distance == 2400) )
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               System.out.println("Error! Distance can either 1365, 1400, 1500, 1600, 1800, 2000, 2200, 2400");
               //using mastery factor recursion to allow the user to input the distance again
               obtainDistance(distance);
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     **Validation rule: length check
     **The name of the winner cannot exceed 18 characters
     public static void obtainWinner(String winner)
          System.out.println("Winner: ");
          winner = input.readLine();
          //using if...else
          if (winner.length() <= 18)
               //do nothing
          else
               //output error message
               System.out.println("Error! The name of the winner cannot exceed 18 characters");
               //using mastery factor recursion to allow the user to input the winner again
               obtainWinner(winner);
     /**This is the method to get the stewards' comments on a horse
     **No validation rules
     **Any string is accepted
     public static void obtainCommentsStewards(String commentsStewards)
          System.out.println("Stewards' comments: ");
          commentsStewards = input.readLine();
     /**This is the method to get the stewards' comments on a horse
     **No validation rules
     **Any string is accepted
     public static void obtainCommentsJockey(String commentsJockey)
          System.out.println("Jockey's comments: ");
          commentsJockey = input.readLine();
     /**This is the method to get the stewards' comments on a horse
     **No validation rules
     **Any string is accepted
     public static void obtainCommentsPersonal(String commentsPersonal)
          System.out.println("Personal comments: ");
          commentsPersonal = input.readLine();
}

I see one problem already though. You defined "input" as a local variable in your main method, and then refer to it all over the place, outside of the main method.
If you want to use input like that, you'll have to define it as a field, not a local variable.
By the way your code is structured in a kind of hairy way. In OOP you usually want to structure your code around self-contained, encapsulated state and behavior, not just as a bunch of individual actions effecting global variables.

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Check how the data is encoded, and set your program and computer for compatibility.
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2 ekjghqflatrcdteurofahxoiyvrwhvaxjgcuvkkpondsqhedxylxyjizflfbgusoizogbffgwnswohe njixwufcdlbjlkoqevqdy
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5 fpfrspbuhangkeugfuwexsgivetovkoyloddgofdcajwwlrocgjrhonsrfrfxozvgohwoytycfjoycr xdhnhxyitkeqynedrbroh
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while((bufferedReaderObject.readLine()) != null)
System.out.println(bufferedReaderObject.readLine());
Last System.out.println statement only displays second, forth, sixth, eigth, tenth and null lines. Why not every line? Any ideas? Thanks!
Re: BufferedReader's readLine() method problem.
Author: EagleEye101 Feb 18, 2005 8:48 PM (reply 1 of 1)
You do relize that when you call the in.readLine() in your loop conditional and in your loop body it reads in diffrent lines. Try this:
public String searchForAString(String fileName, int lineNumber)
File fileObject = new File(fileName);
String finalString ="";
String record = "";
int line;
try
FileInputStream fileInputStreamObject = new FileInputStream(fileObject);
BufferedInputStream bufferedInputStreamObject = new BufferedInputStream(fileInputStreamObject);
//DataInputStream dataInputStreamObject = new DataInputStream(bufferedInputStreamObject);
BufferedReader bufferedReaderObject = new BufferedReader(new InputStreamReader(bufferedInputStreamObject));
//System.out.println(bufferedReaderObject.readLine());
//System.out.println("_____________________");
String s = bufferedReaderObject.readLine();
while(s != null)
System.out.println(bufferedReaderObject.readLine());
s = bufferedReaderObject.readLine();
Every time you call the readLine method, it does read a diffrent line. Java does not know you want to read the same line twice.
Tried it, did not work. I need to go through each line of the file I have. Any ideas?

solution should be in your other thread.
Please do not repeat threads--it really bugs the people here, just some 'nettiquite' --I don't mean to be a grouch.
--later. : )

BufferedReader's readLine() method problem.

Hello,
If anyone can help me out I would not have to struggle :)
Here is the thing. I have a file like this:
1     srjetnuaazcebsqfbzerhxfbdfcbxyvihswlygzsfvjleengcftwvxcjriwdohjisnzppipiwpnniuiyjpeppaezftgjfviwxunu
2     ekjghqflatrcdteurofahxoiyvrwhvaxjgcuvkkpondsqhedxylxyjizflfbgusoizogbffgwnswohenjixwufcdlbjlkoqevqdy
3     stfhcbslgcrywwrgbsqdkcxfbizvniyookceonscwugixgrxvvkxiqezltsiwhhepqusjdlkhadvkzgiefgarenbxnxtxnqdqpfh
4     dcuefkdrkoovjwdrqbpgoirruutphuiobqweknxhboyktxzcczgekrlbfsbfuygjpheydiwaasxifphtldawxsfepotkgqqsivur
5     fpfrspbuhangkeugfuwexsgivetovkoyloddgofdcajwwlrocgjrhonsrfrfxozvgohwoytycfjoycrxdhnhxyitkeqynedrbroh
6     hgzqqsfgnotfepywbpccrosxborslqtkanyffrwknjapnzjnesjlkbbsckbyvgrxujqyocpcpctsqyzapcinhjyysxsdwfjugndr
7     pltzealtrklzrugxdcskndqyvsrzncitqvjcnndeqossyrifzvbqovtdzsixjlizsbxwutgqipuxfidxyoktwupsuqbqgnxdfbze
8     avpxfjgwpxnzfsfosgsryhpyaezigrqsxsgdvwdbwovhcchrijbitvbcvltrgvadogokaennwpjjpkuuttidlnqftdnzqpqafels
9     oyvztgletdwdtibshpzeuqryvulnubrqtgxwizfsdzqlgxvsebhslnovphgehfigbjyyqsirqcwflbnbnrflotpqytqzbgnkeyrk
10     unvryrnlqucuydrasyzyiclnjvospzdoviqchdhasxzffblwsewikzbznyegrqtjvxfxfjenvrboofbxfsynlxhyuvqprqbvoruk
and my java programs is like this:
public String searchForAString(String fileName, int lineNumber)
File fileObject = new File(fileName);
String finalString ="";
String record = "";
int line;
try
FileInputStream fileInputStreamObject = new FileInputStream(fileObject);
BufferedInputStream bufferedInputStreamObject = new BufferedInputStream(fileInputStreamObject);
//DataInputStream dataInputStreamObject = new DataInputStream(bufferedInputStreamObject);
BufferedReader bufferedReaderObject = new BufferedReader(new InputStreamReader(bufferedInputStreamObject));
//System.out.println(bufferedReaderObject.readLine());
//System.out.println("_____________________");
while((bufferedReaderObject.readLine()) != null)
System.out.println(bufferedReaderObject.readLine());
Last System.out.println statement only displays second, forth, sixth, eigth, tenth and null lines. Why not every line? Any ideas? Thanks!

You do relize that when you call the in.readLine()in
your loop conditional and in your loop body itreads
in diffrent lines. Try this:
public String searchForAString(String fileName,int
lineNumber)
File fileObject = new File(fileName);
String finalString ="";
String record = "";
int line;
try
FileInputStream fileInputStreamObject = new
FileInputStream(fileObject);
BufferedInputStream bufferedInputStreamObject =new
BufferedInputStream(fileInputStreamObject);
//DataInputStream dataInputStreamObject = new
DataInputStream(bufferedInputStreamObject);
BufferedReader bufferedReaderObject = new
BufferedReader(new
InputStreamReader(bufferedInputStreamObject));
//System.out.println(bufferedReaderObject.readLine());
//System.out.println("_____________________");
String s = bufferedReaderObject.readLine();
while(s != null)
System.out.println(bufferedReaderObject.readLine());
s = bufferedReaderObject.readLine();
Every time you call the readLine method, it doesread
a diffrent line. Java does not know you want toread
the same line twice.Err, shouldn't that be:
while(s != null)
System.out.println(s);
s = bufferedReaderObject.readLine();
Otherwise, you're still discarding a line if you use
two readLines in the while loop.yes you are correct... srry late last night and I wsa copying his code :).

Problem with threads running javaw

Hi,
Having a problem with multi thread programming using client server sockets. The program works find when starting the the application in a console using java muti.java , but when using javaw multi.java the program doesnt die and have to kill it in the task manager. The program doesnt display any of my gui error messages either when the server disconnect the client. all works find in a console. any advice on this as I havent been able to understand why this is happening? any comment would be appreciated.
troy.

troy,
Try and post a minimum code sample of your app which
does not work.
When using javaw, make sure you redirect the standard
error and standard output streams to file.
Graeme.Hi Graeme,
I dont understand what you mean by redirection to file? some of my code below.
The code works fine under a console, code is supposed to exit when the client (the other server )disconnects. the problem is that but the clientworker side of the code still works. which under console it doesnt.
public class Server{
ServerSocket aServerSocket;
Socket dianosticsSocket;
Socket nPortExpress;
ClientListener aClientListener;
LinkedList queue = new LinkedList();
int port = 0;
int clientPort = 0;
String clientName = null;
boolean serverAlive = true;
* Server constructor generates a server
* Socket and then starts a client threads.
* @param aPort      socket port of local machine.
public Server(int aPort, String aClientName, int aClientPort){
port = aPort;
clientName = aClientName;
clientPort = aClientPort;
try{
// create a new thread
aServerSocket = new ServerSocket(port) ;
// connect to the nPortExpress
aClientListener = new ClientListener(InetAddress.getByName(clientName), clientPort, queue,this);
// aClientListener.setDaemon(true);
aClientListener.start();
// start a dianostic port
DiagnosticsServer aDiagnosticsServer = new DiagnosticsServer(port,queue,aClientListener);
// System.out.println("Server is running on port " + port + "...");
// System.out.println("Connect to nPort");
catch(Exception e)
// System.out.println("ERROR: Server port " + port + " not available");
JOptionPane.showMessageDialog(null, (e.toString()),"ERROR: Server port " + port + " not available", JOptionPane.ERROR_MESSAGE);
serverAlive = false;
System.exit(1);
while(serverAlive&&aClientListener.hostSocket.isConnected()){
try{
// connect the client
Socket aClient = aServerSocket.accept();
//System.out.println("open client connection");
//System.out.println("client local: "+ aClient.getLocalAddress().toString());
// System.out.println("client localport: "+ aClient.getLocalPort());
// System.out.println("client : "+ aClient.getInetAddress().toString());
// System.out.println("client port: "+ aClient.getLocalPort());
// make a new client thread
ClientWorker clientThread = new ClientWorker(aClient, queue, aClientListener, false);
// start thread
clientThread.start();
catch(Exception e)
//System.out.println("ERROR: Client connection failure");
JOptionPane.showMessageDialog(null, (e.toString()),"ERROR: Client connection failure", JOptionPane.ERROR_MESSAGE);
}// end while
} // end constructor Server
void serverExit(){
     JOptionPane.showMessageDialog(null, "Server ","ERROR: nPort Failure", JOptionPane.ERROR_MESSAGE);
     System.exit(1);
}// end class Server
*** connect to another server
public class ClientListener extends Thread{
InetAddress hostName;
int hostPort;
Socket hostSocket;
BufferedReader in;
PrintWriter out;
boolean loggedIn;
LinkedList queue;      // reference to Server queue
Server serverRef; // reference to main server
* ClientListener connects to the host server.
* @param aHostName is the name of the host eg server name or IP address.
* @param aHostPort is a port number of the host.
* @param aLoginName is the users login name.
public ClientListener(InetAddress aHostName, int aHostPort,LinkedList aQueue,Server aServer)      // reference to Server queue)
hostName = aHostName;
hostPort = aHostPort;
queue = aQueue;
serverRef = aServer;
// connect to the server
try{
hostSocket = new Socket(hostName, hostPort);
catch(IOException e){
//System.out.println("ERROR: Connection Host Failed");
JOptionPane.showMessageDialog(null, (e.toString()),"ERROR: Connection to nPort Failed", JOptionPane.ERROR_MESSAGE);
System.exit(0);
} // end constructor ClientListener
** multi client connection server
ClientWorker(Socket aSocket,LinkedList aQueue, ClientListener aClientListener, boolean diagnostics){
queue = aQueue;
addToQueue(this);
client = aSocket;
clientRef = aClientListener;
aDiagnostic = diagnostics;
} // end constructor ClientWorker
* run method is the main loop of the server program
* in change of handle new client connection as well
* as handle all messages and errors.
public void run(){
boolean alive = true;
String aSubString = "";
in = null;
out = null;
loginName = "";
loggedIn = false;
while (alive && client.isConnected()&& clientRef.hostSocket.isConnected()){
try{
in = new BufferedReader(new InputStreamReader(client.getInputStream()));
out = new PrintWriter(new OutputStreamWriter(client.getOutputStream()));
if(aDiagnostic){
out.println("WELCOME to diagnostics");
broadCastDia("Connect : diagnostics "+client.getInetAddress().toString());
out.flush();
else {
out.println("WELCOME to Troy's Server");
broadCastDia("Connect : client "+client.getInetAddress().toString());
     out.flush();
String line;
while(((line = in.readLine())!= null)){
StringTokenizer aStringToken = new StringTokenizer(line, " ");
if(!aDiagnostic){
broadCastDia(line);
clientRef.sendMessage(line); // send mesage out to netExpress
out.println(line);
out.flush();
else{
if(line.equals("GETIPS"))
getIPs();
else{
clientRef.sendMessage(line); // send mesage out to netExpress
out.println(line);
out.flush();
} // end while
catch(Exception e){
// System.out.println("ERROR:Client Connection reset");
                         JOptionPane.showMessageDialog(null, (e.toString()),"ERROR:Client Connection reset", JOptionPane.ERROR_MESSAGE);
try{
if(aDiagnostic){
broadCastDia("Disconnect : diagnostics "+client.getInetAddress().toString());
out.flush();
else {
broadCastDia("Disconnect : client "+client.getInetAddress().toString());
     out.flush();
// close the buffers and connection;
in.close();
out.close();
client.close();
// System.out.println("out");
// remove from list
removeThreadQueue(this);
alive = false;
catch(Exception e){
// System.out.println("ERROR: Client Connection reset failure");
JOptionPane.showMessageDialog(null, (e.toString()),"ERROR: Client Connection reset failure", JOptionPane.ERROR_MESSAGE);
}// end while
} // end method run
* method run - Generates io stream for communicating with the server and
* starts the client gui. Run also parses the input commands from the server.
public void run(){
boolean alive = true;
try{
// begin to life the gui
// aGuiClient = new ClientGui(hostName.getHostName(), hostPort, loginName, this);
// aGuiClient.show();
in = new BufferedReader(new InputStreamReader(hostSocket.getInputStream()));
out = new PrintWriter(new OutputStreamWriter(hostSocket.getOutputStream()));
while (alive && hostSocket.isConnected()){
String line;
while(((line = in.readLine())!= null)){
System.out.println(line);
broadCast(line);
} // end while
} // end while
catch(Exception e){
//     System.out.println("ERRORa Connection to host reset");
JOptionPane.showMessageDialog(null, (e.toString()),"ERROR: Connection to nPort reset", JOptionPane.ERROR_MESSAGE);
try{
hostSocket.close();
     }catch(Exception a){
     JOptionPane.showMessageDialog(null, (a.toString()),"ERROR: Exception", JOptionPane.ERROR_MESSAGE);
alive = false;
System.exit(1);
} // end method run

Problems with String.split(regex)

Hi! I'm reading from a text file. I do it like this: i read lines in a loop, then I split each line into words, and in a for loop I process ale words. Heres the code:
BufferedReader reader = new BufferedReader(new FileReader(file));
String line;
while ((line = reader.readLine()) != null) {
String[] tokens = line.split(delimiters);
for (String key : tokens) {
doSthToToken();
reader.close();The problem is that if it reads an empty line, such as where is only an "\n", the tokens table has the length == 1, and it processes a string == "". I think the problem is that my regex delimiters is wrong:
String delimiters = "\\p{Space}|\\p{Punct}";
Could anybody tell me what to do?

Ok, so what do you suggest?I suggest you don't worry about it.
Or if you are worried then you need to test the two different solutions and do some timings yourself.
And how do you know the regex lib is so slow and badly written?First of all slowness is all relative. If something takes 1 millisecond vs 4 milliseconds is the user going to notice? Of course not which is why you are wasting your time trying to optimize an equals() method.
A general rule is that any code that is written to be extremely flexible will also be slower than any code that is written for a specific function. Regex are used for complex pattern matching. StringTokenizer was written specifically to split a string based on given delimiters. I must admit I haven't tested both in your exact scenario, but I have tested it in other simple scenarios which is where I got my number.
By the way I was able to write my own "SimpleTokenizer" which was about 30% faster than the StringTokenizer because I was able to make some assumptions. For example I only allowed a single delimiter to be specified vs multiple delimiter handled by the StringTokenizer. Therefore my code could be very specific and efficient. Now think about the code for a complex Regex and how general it must be.

Problems with string tokenizer

okay heres my problem, i have a textarea displaying a program listing and i have to extract variables i.e public int something;
i have tried many different approaches but still the output is not what i was looking for. Can someone have a look at my code and check for mistakes that i cant find
public void createDataDictionary() {
          if(fullText.equals("")) return;//do nothing if no text exists
          String checkText = fileContents.getText();//store text area contents into string
          String dataType = "";
          String variable = "";
          String accessModifier = "";
          StringTokenizer str = new StringTokenizer(checkText," \n", true);
          fileCheckBox.setText("");//clear file check box
          while(str.hasMoreTokens()) {//loop while there are more tokens to tokenize
               try{
                    checkText = str.nextToken();
                    //check for comments
                    if((checkText.startsWith("//")) || (checkText.equals("//")) ||
                       (checkText.startsWith("/**")) || (checkText.equals("/**")) ||
                       (checkText.startsWith("*")) || (checkText.equals("*"))) {
                         isComment = true;
                    if((checkText.equals("\n"))) isComment = false;
                    if(!isComment)
                         //check for access modifiers
                         if((checkText.equals("public")) || (checkText.equals("private")) ||
                            (checkText.equals("protected"))) {
                                      accessModifier = checkText;
                                 }else {
                                      accessModifier = "";
                         //check for data types
                         if((checkText.equals("boolean")) || (checkText.equals("char")) ||
                                 (checkText.startsWith("String")) || (checkText.equals("int"))) {
                                   dataType = checkText;
                                   variable = str.nextToken();//get variable expression
                                   System.out.println(accessModifier + " " + dataType + " " + variable);
               }catch(NoSuchElementException nsee) {//not enough tokens to complete operation
                    JOptionPane.showMessageDialog(null, "End of file");
                    return;//break from method
     }here is sample text
private String seven = "help";
char five[];
// String here
//int found
public boolean okay
and here is the output
String
char
String
boolean
//note the space before each output
hope someone can help
thanx in advance

1. Why do you check to see if the token starts with
//, /*, etc, etc. Later you check if the token
equals private, public, protected. It couldn't
equal if it started with a comment.if the token starts with a comment i dont want to read the rest of the line, so i set the isComment flag to true
2. I strongly suggest that you do it line by line.
Perhaps a string tokenizer that only tokenizes by
lines, then within that loop, another that tokenizes
by whitespace. i take it you mean putting the text into a bufferedreader and then using readLine()?? Bit new to string tokenization as you can possibly see
i managed to get the small test text to work more or less as i wanted but when ever i load a large code listing, the results are erratic to say the least
heres a section of this code
private int textNum = 0;/**Integer used to hold the text position within any given line*/
     private int lineNum = 0;/**Integer used to hold the line number within any given file*/
     static boolean application = false;/**Used to track if applet is ran from a browser or JAR file*/
     static boolean fileOpened = false;/**Used to track if file has already been opened*/
     static boolean isComment = false;
     private char lCurve = '(';
     private char rCurve = ')';
     private char lCurly = '{';
     private char rCurly = '}';
     private char lSquare = '[';
     private char rSquare = ']';
     String fullText = "";and heres the output
public int textNum //should be private!!!!
int lineNum //missing private
boolean application //missing static
boolean fileOpened //missing static
boolean isComment //missing static
//all below missing private
char lCurve
char rCurve
char lCurly
char rCurly
char lSquare
char rSquare
String fullText //not there at all

Arraylist.add() problem

Hi,
I'm trying to read a CSV text file into an arraylist.
I can read the text file fine, its just when it gets to the actual arraylist.add() part it just .. .. doesn't work. It can print the values from the CSV file no problem. I'm sure my syntax is fine, everything compiles. I've read it and double checked it and checked it again.
It just doesn't work .. I don't know why.
The arraylist I am trying to read into is
ArrayList<Customer> customers = new ArrayList<Customer>();Within other parts of the program I can read in dummy data, eg
customers.add(new Customer(01, "Jims Mowing", "16 Long Grass Street", "Thorndale", "123-4567", "[email protected]"));
but suffice to say, yes, it is kaput.
   * READING THE CUSTOMER TEXT FILE INTO THE ARRAY LIST
private void custFileToArray ()
    RectangleTUI results = new RectangleTUI(); // create results object
    try
      BufferedReader inputStream = new BufferedReader(new FileReader(PATHNAME + CUSTFILE));
      System.out.println("Contents of file: " + CUSTFILE); // print heading
      String line = inputStream.readLine(); // read first line
      while (line !=null) // test for end of file (EOF)
        results.loadCustFile(line);
        line = inputStream.readLine(); // read next line
      // close file
      inputStream.close();
    // catch any file open errors
    catch(FileNotFoundException e)
      System.out.println("Error opening file: " + CUSTFILE);
      System.exit(0);
    catch(NoSuchElementException e)
      System.out.println("ATTENTION: One or more " + CUSTFILE + " records are missing data");
    // catch any file reading errors
    catch(IOException e)
      System.out.println("Error reading from file: " + CUSTFILE);
      System.exit(0);
    System.out.println("File Reading Complete");
private void loadCustFile(String textLine)
    String delimiters = ","; // set tokenizer delimiter
    StringTokenizer RecordFields = new StringTokenizer(textLine,delimiters);
    int cidNum = Integer.parseInt(RecordFields.nextToken()); // Customer ID
    System.out.println(cidNum + " Hello I am a stupid piece of code. I don't like to work properly");
    String cName = RecordFields.nextToken();   // Name
    String cAdd = RecordFields.nextToken();   // Street Address
    String cBurb = RecordFields.nextToken();   // Suburb
    String cPhone = RecordFields.nextToken();   // Phone
    String cEmail = RecordFields.nextToken();   // Email
    customers.add(new Customer(cidNum, cName, cAdd, cBurb, cPhone, cEmail));
}

Cowzor wrote:
Hi,
Cheers for the replies & the printStackTrace tip.
The thing is it's not actually throwing up any errors or crashing. It's acting as if everything is AOK - but since it then says there's nothig in the arraylist there must be a problem ... somewhere.
Sorry if I've mis-understood what you were saying
Here's the dummy data I'm using just incase it's at all relevant
200701,Jims Mowing,16 Long Grass Street,Thorndale,123-4567,[email protected]
200702,Chevy Racers,2 Raceway Drive,Boganville,123-4567,[email protected]
200703,Renta Dent,82 Airport Oaks Road,Airport Oaks,123-4567,[email protected]
200704,Discount Taxis,8 Poor Place,Otara,123-4567,[email protected]
u split contains of CSV file on basis of , (comma) and read it

Problem with ArrayList

Hello,
I am having a problem with a program I am trying to write. The idea of the program is to:
A) read a list of movies list from a text file
B) create an object for each movie using the information from the text file
C) place the objects into an arrayList
My problem is that when I check my arrayList it seems to only contain multiple copies of the first movie read from the text file. Here is my code
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
import java.io.FileOutputStream;
import java.io.FileNotFoundException;
import java.util.ArrayList;
public class MovieReader
     PrintWriter outputStream = null;
     public void readFile()
          try
                  BufferedReader in = new BufferedReader(new FileReader("movie.txt"));
                  String str;
                  while ((str = in.readLine()) != null)
                       process(str);
                  in.close();
          catch (IOException e)
              e.printStackTrace();
     ArrayList <ValidMovie> movieList = new ArrayList<ValidMovie>();
     private void process(String line)
          String[] array = line.split("\t");
          int i = 0;
          for ( i = 0; i < array.length; i++)
               String tempTitle = array[0];
               String tempYear = array [1];
               String tempRating = array [2];
               String tempFormat = array [3];
               ValidMovie uuj = new ValidMovie(tempTitle, tempYear, tempRating, tempFormat);
               movieList.add(uuj);
          System.out.println("item at index 1 is:   " + movieList.get(1));
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     private void writeFile(String [] arrayL)
          String [] arrayWrite = arrayL;
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
     public static void main(String[] args)
          MovieReader mv = new MovieReader();
          mv.readFile();
//$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
}This is the code that creates an object for each movie:
import java.io.Serializable;
public class ValidMovie implements Serializable
     private String title;
     private String year;
     private String rating;
     private String format;
     public ValidMovie()
     public ValidMovie(String tTitle, String tYear, String tRating, String tFormat)
          title = tTitle;
          year = tYear;
          rating = tRating;
          format = tFormat;
     //Getters for title, year, rating and format
     public String getTitle ()
          return title;
     public String getYear ()
          return year;
     public String getRating ()
          return rating;
     public String getFormat ()
          return format;
     public String toString ()
          return title + "\t" + year + "\t" + rating + "\t" + format;
}The following is what I have in the movie.txt file:
Bamboozled     2000     2     DVD
What Lies Beneath     2000     1.5     DVD
Beneath the Planet of the Apes     1970     1     DVD
You Can Count On Me     2000     3.5     Theater
And finally this is the result when I run the code:
item at index 1 is: Bamboozled     2000     2     DVD
item at index 1 is: Bamboozled     2000     2     DVD
item at index 1 is: Bamboozled     2000     2     DVD
item at index 1 is: Bamboozled     2000     2     DVD
I am sure that it is something simple that I am overlooking but I cannot figure it out. When I change the index in the code:
System.out.println("item at index 1 is:   " + movieList.get(1));to 0 or 2 or 3 then result is the same, it will just show the first movie in the text file. Any help would be greatly appreciated. Thanks

Thanks for the reply, it helped but I am now getting 4 of each of the movies after adding you suggestion. This is much better now I just need to figure out why the loop is causing the extra copies. Thanks again :)
Item 0: Bamboozled     2000     2     DVD
Item 1: Bamboozled     2000     2     DVD
Item 2: Bamboozled     2000     2     DVD
Item 3: Bamboozled     2000     2     DVD
Item 4: What Lies Beneath     2000     1.5     DVD
Item 5: What Lies Beneath     2000     1.5     DVD
Item 6: What Lies Beneath     2000     1.5     DVD
Item 7: What Lies Beneath     2000     1.5     DVD
Item 8: Beneath the Planet of the Apes     1970     1     DVD
Item 9: Beneath the Planet of the Apes     1970     1     DVD
Item 10: Beneath the Planet of the Apes     1970     1     DVD
Item 11: Beneath the Planet of the Apes     1970     1     DVD
Item 12: You Can Count On Me     2000     3.5     Theater
Item 13: You Can Count On Me     2000     3.5     Theater
Item 14: You Can Count On Me     2000     3.5     Theater
Item 15: You Can Count On Me     2000     3.5     Theater

Reading into ArrayList problem - what is wrong?

Hi, I am trying to read a list of strings into an ArrayList and am having some problems. I have created a main() which at the moment does nothing, its just to make sure that the array's content is genuine (meaning consistent with the string in the text file) so I am having it simply printed out to screen. The error I am getting is "cannot resolve symbol, variable array" by my compiler (Jcreator). I will paste the code below:
import java.io.*;
import java.util.*;
public class hostList{
public hostList()
try
File input = new File("hosts.txt");
BufferedReader in=new BufferedReader(
     new InputStreamReader(new FileInputStream(input)));
     ArrayList list=new ArrayList();
     String line;
     while((line=in.readLine())!=null)
          list.add(line);
     String[] array=new String[list.size()];
     list.toArray(array);
     in.close();
catch(FileNotFoundException e)
System.err.println("File not found...");
catch(IOException e)
System.err.println("IO Problem");
}//hostLst()
     public static void main (String [] args){
          System.out.println("Array content:");
          System.out.println("array " + array[0]);
          for (int i=0; array[i] !=null; i++)
               System.out.println(array);
     }//main
}//class
Also, how would I use the array objects in another class, say class B. How can I access the arrays in class B so that i can use its methods? eg. array[i].doSomething(); where doSomething() is a method in class B. What libraries would i need to import (if any) ?
Help is appreciated, thanks.

this code wont compile bcas in main method u r not creating the object of this class also the var array is not globally declared hence wont be accesibile outside
u can try this modified code
import java.io.*;
import java.util.*;
public class hostList{
String[] array=null;
public hostList()
try
File input = new File("hosts.txt");
BufferedReader in=new BufferedReader(
new InputStreamReader(new FileInputStream(input)));
ArrayList list=new ArrayList();
String line;
while((line=in.readLine())!=null)
list.add(line);
array=new String[list.size()];
list.toArray(array);
in.close();
catch(FileNotFoundException e)
System.err.println("File not found...");
catch(IOException e)
System.err.println("IO Problem");
}//hostLst()
public static void main (String [] args){
hostList h=new hostList();
System.out.println("Array content:");
System.out.println("array " + h.array[0]);
}//main
}//class

Problem appending multiple lines with StringBuffer()

I have problem executing this code -
I am reading a line from keyboard. And after every line I store a space as well.
O/p shows just the first line, space and then null.
Why would it not print the next lines.
    StringBuffer buf = new StringBuffer();
do {
str = br.readLine();
    buf.append(str).append(" ");
   } while (str != null);

Well, when I input 3 lines and press ^C to end the
input , the above lines get appended but the last
line does not append.Why are you pressing ^C? That should make your app abend if you're reading from the System.in stream.
Anyway, I'd guess you're entering the last line without pressing Enter, so it doesn't actually get entered (nor read).

Connection Problem while client is behind proxy and server out side proxy

hello
i implemented ChatApplication in JAVA, for that i used socket connection when client and server both are in same network then it's working fine.
but when my server is on internate and client is behind proxy and try to connect with server
it not able to connect i get exception.
i serch most of forum i got same answer and i try it but i was not success.
any kind of help is appriciated.
i attached my code(which i implement for testing ) pls reply me
thanks in advance.
Server.java
import java.lang.*;
import java.io.*;
import java.net.*;
class Server {
   public static void main(String args[]) {
      String data = "you are successfully connected with server.";
      try {
         ServerSocket srvs = new ServerSocket(1234);
         Socket skt = srvs.accept();
         System.out.print("Server has connected!\n");
         PrintWriter out = new PrintWriter(skt.getOutputStream(), true);
         System.out.print("Sending string: '" + data + "\n");
         out.print(data);
         out.close();
         skt.close();
         srvs.close();
      catch(Exception e) {
         System.out.print("Whoops! It didn't work!\n");
ProxyClient.java
import java.io.*;
import java.net.*;
import java.util.*;
class ProxyClient{
   public static void main(String args[]) {
     String host="61.17.212.29";
     int port=1234;
           String line;
     Properties properties = System.getProperties();
     /*properties.put("firewallSet", "true");
     properties.put("firewallHost", "192.168.0.1");
     properties.put("firewallPort", "808");*/
     properties.put("socksProxySet","true");
     properties.put("socksProxyHost", "192.168.0.1");
     properties.put("socksProxyPort", "1080");
     System.setProperties (properties);
     try {
     /*SocketAddress addr = new InetSocketAddress("192.168.0.1", 1080);
     Proxy proxy = new Proxy(Proxy.Type.SOCKS, addr);
     Socket skt = new Socket(proxy);
     InetSocketAddress dest = new InetSocketAddress("61.17.212.29",1234);
     skt.connect(dest);*/
         System.out.println("before socket taken");
         Socket skt = new Socket(host,port);
         System.out.println("after socket taken");
         BufferedReader networkBin = new BufferedReader(new InputStreamReader(skt.getInputStream()));
         System.out.println("Received string: '");
         line = networkBin.readLine();     // Read one line
      while(true)
             System.out.println(line);     // Output the line
             line = networkBin.readLine(); // Read the next line, if any
      catch(Exception e) {
         System.out.print("Whoops! It didn't work!\n");
     e.printStackTrace();
}

Now look here. I could not care less about this
code. I don't know anything about it, I don't
want to know, I have already recommended you don't
use it, and I have also given you a simpler and
better solution. If you don't want to take my advice
that is your privilege and your problem.ya i has understand system propertis i have setted and u can see it in the code i have tried by both system properties and also J2SE 5.0 proxy class but i got a same problem malformed Exception server refuse to connection.
is there any problem at sever side?
can u tell me in which way u r teling to set the propery i m looking forward for ur reply.
ya i m sure u will give me.................reply "ejp".
Thnx in advance.

ReadLine problem

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