Help with file handling

hi guys, i have an assignment. basically my problem is writing data to an external file over and over again, without overwriting the previous data. the problem with this code is that after one iteration of the while loop, it overwrites the previous data. how can i make the program write to another line in the file without over-writing the previous data? thanks.
        while (true)
        int questno = inputquestNo();
        int postcode = inputpostCode();
        int age = inputAge();
        if (age <=25) count25less++;
        if (age >=26 && age <=45) count26to45++;
        if (age >=46) count46more++;
        String gender = inputGender();
        if (gender.equalsIgnoreCase("M")) countmale++;
        if (gender.equalsIgnoreCase("F")) countfemale++;
        for (int i=0;i<noq;i++)
            System.out.print("Response to Question " + (i+1) + ": ");
            int ans = in.nextInt();
                while(!(ans>=1 && ans<=question.length))
System.out.print("Invalid input, try again: " );
ans = in.nextInt();
question[i][ans-1]++;
try
fout = new FileOutputStream("store.dat");
out = new PrintStream(fout);
out.println(questno + " " + postcode + " " + age + " " + gender);
fout.close();
catch (IOException e)
System.err.println("Unable to write to file");
System.exit(-1);
System.out.print("Exit?");
String exit = in.next();
if (exit.equalsIgnoreCase("Y")) break;
if (exit.equalsIgnoreCase("N")) System.out.println("");

hey thanks, it works. i just had to change the following to the above code
fout = new FileOutputStream("store.dat", true);FileOutputStream(File file, boolean append)

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M new to this forum + new to java please help me with file handling program

hi i want to make a file handling program where in i want to input a text file say f1 whose style is mentioned as below
aaa...bcd
aaabbc
acdce
a..dd
abbcd
now i want to write d out put of file f1 to file f2 but only those string entries widout any ... in them how to do that :-(( please help :((

import java.io.*;
import java.lang.*;
class javcsse{
         void javsce (){
          BufferedReader in;
        PrintWriter out;
        String line;
        try
            in = new BufferedReader(new FileReader("e:\\cntcs\\n7.txt"));
            out = new PrintWriter("e:\\cntcs\\n8.txt");
           line = in.readLine();
           while(line != null)
                 if(line.contains("...") && line.contains("....")){
                     break ;
                     else{
                           if(line.contains("cc"))
                          System.out.println(line+"\n");
                                  out.println(line);
                line = in.readLine();
            in.close();
            out.close();
        } catch (Exception ex)
            System.err.println(ex.getMessage());
public class javcse{
    public static void main(String[] args) {
        new javcsse();
}hey i wrote this code yet could u tell y is it still not working :((

Problem with File Handler and log files

I'm developing a polymorphic structure for file handling specially for the log file for a server based App... Its working fine except for one thing. The log file that goes into the File Handler comes as a parameter to the class, the problem is that when it writes de file, though it DOES know where it should go, it doesn't do it and it writes the message into some other Log file belonging to another process...
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Immediately below the Tabs saying "Files" and Assets" is a small box
with arrow on the right to show the drop down list.        In the box
on the right there's an icon of two networked computers. Then it
says, "ftp://Hill farm Web Site" which is the name of my website.
If I click on the arrows to pull up the drop-down box, I get four
options divided by a line.   Above the line the options are Computer,
HD and ftp://Hill farm Web Site. Below the line it says manage sites.
Below this is list of files that make up my website in a directory
structure.   The header for the first column reads, "Local Files",
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Need Help With File Matching Records

I need help with my file matching program.
Here is how it suppose to work: FileMatch class should contain methods to read oldmast.txt and trans.txt. When a match occurs (i.e., records with the same account number appear in both the master file and the transaction file), add the dollar amount in the transaction record to the current balance in the master record, and write the "newmast.txt" record. (Assume that purchases are indicated by positive amounts in the transaction file and payments by negative amounts.)
When there is a master record for a particular account, but no corresponding transaction record, merely write the master record to "newmast.txt". When there is a transaction record, but no corresponding master record, print to a log file the message "Unmatched transaction record for account number ..." (fill in the account number from the transaction record). The log file should be a text file named "log.txt".
Here is my following program code:
// Exercise 14.8: CreateTextFile.java
// creates a text file
import java.io.FileNotFoundException;
import java.lang.SecurityException;
import java.util.Formatter;
import java.util.FormatterClosedException;
import java.util.NoSuchElementException;
import java.util.Scanner;
import org.egan.AccountRecord;
import org.egan.TransactionRecord;
public class CreateTextFile
private Formatter output1; // object used to output text to file
private Formatter output2; // object used to output text to file
// enable user to open file
public void openTransFile()
    try
      output1 = new Formatter("trans.txt");
    catch (SecurityException securityException)
      System.err.println("You do not have write access to this file.");
      System.exit(1);
    } // end catch
    catch (FileNotFoundException filesNotFoundException)
      System.err.println("Error creating file.");
      System.exit(1);
} // end method openTransFile
// enable user to open file
public void openOldMastFile()
    try
      output2 = new Formatter("oldmast.txt");
    catch (SecurityException securityException)
      System.err.println("You do not have write access to this file.");
      System.exit(1);
    } // end catch
    catch (FileNotFoundException filesNotFoundException)
      System.err.println("Error creating file.");
      System.exit(1);
} // end method openOldMastFile
// add transaction records to file
public void addTransactionRecords()
    // object to be written to file
    TransactionRecord record1 = new TransactionRecord();
    Scanner input1 = new Scanner(System.in);
    System.out.printf("%s\n%s\n%s\n%s\n\n",
      "To terminate input, type the end-of-file indicator",
      "when you are prompted to enter input.",
      "On UNIX/Linux/Mac OS X type <ctrl> d then press Enter",
      "On Windows type <ctrl> z then press Enter");
    System.out.printf("%s\n%s",
       "Enter account number (> 0) and amount.","? ");
    while (input1.hasNext()) // loop until end-of-file indicator
      try // output values to file
        // retrieve data to be output
        record1.setAccount(input1.nextInt());    // read account number
        record1.setAmount(input1.nextDouble()); // read amount
        if (record1.getAccount() > 0)
          // write new record
          output1.format("%d %.2f\n", record1.getAccount(), record1.getAmount());
        } // end if
        else
          System.out.println("Account number must be greater than 0.");
        } // end else
      } // end try
      catch (FormatterClosedException formatterClosedException)
        System.err.println("Error writing to file.");
        return;
      } // end catch
      catch (NoSuchElementException elementException)
        System.err.println("Invalid input. Please try again.");
        input1.nextLine(); // discard input so user can try again
      } // end catch
      System.out.printf("%s %s\n%s", "Enter account number (> 0) ",
        "and amount.","? ");
    } // end while
} // end method addTransactionRecords
// add account records to file
public void addAccountRecords()
    // object to be written to file
    AccountRecord record2 = new AccountRecord();
    Scanner input2 = new Scanner(System.in);
    System.out.printf("%s\n%s\n%s\n%s\n\n",
      "To terminate input, type the end-of-file indicator",
      "when you are prompted to enter input.",
      "On UNIX/Linux/Mac OS X type <ctrl> d then press Enter",
      "On Windows type <ctrl> z then press Enter");
    System.out.printf("%s\n%s",
       "Enter account number (> 0), first name, last name and balance.","? ");
    while (input2.hasNext()) // loop until end-of-file indicator
      try // output values to file
        // retrieve data to be output
        record2.setAccount(input2.nextInt());    // read account number
        record2.setFirstName(input2.next());      // read first name
        record2.setLastName(input2.next());       // read last name
        record2.setBalance(input2.nextDouble()); // read balance
        if (record2.getAccount() > 0)
          // write new record
          output2.format("%d %s %s %.2f\n", record2.getAccount(), record2.getFirstName(),
            record2.getLastName(), record2.getBalance());
        } // end if
        else
          System.out.println("Account number must be greater than 0.");
        } // end else
      } // end try
      catch (FormatterClosedException formatterClosedException)
        System.err.println("Error writing to file.");
        return;
      } // end catch
      catch (NoSuchElementException elementException)
        System.err.println("Invalid input. Please try again.");
        input2.nextLine(); // discard input so user can try again
      } // end catch
      System.out.printf("%s %s\n%s", "Enter account number (> 0),",
        "first name, last name and balance.","? ");
    } // end while
} // end method addAccountRecords
// close file
public void closeTransFile()
    if (output1 != null)
      output1.close();
} // end method closeTransFile
// close file
public void closeOldMastFile()
    if (output2 != null)
      output2.close();
} // end method closeOldMastFile
} // end class CreateTextFile--------------------------------------------------------------------------------------------------
// Exercise 14.8: CreateTextFileTest.java
// Testing class CreateTextFile
public class CreateTextFileTest
   // main method begins program execution
   public static void main( String args[] )
     CreateTextFile application = new CreateTextFile();
     application.openTransFile();
     application.addTransactionRecords();
     application.closeTransFile();
     application.openOldMastFile();
     application.addAccountRecords();
     application.closeOldMastFile();
   } // end main
} // end class CreateTextFileTest-------------------------------------------------------------------------------------------------
// Exercise 14.8: TransactionRecord.java
// A class that represents on record of information
package org.egan; // packaged for reuse
public class TransactionRecord
private int account;
private double amount;
// no-argument constructor calls other constructor with default values
public TransactionRecord()
    this(0,0.0); // call two-argument constructor
} // end no-argument AccountRecord constructor
// initialize a record
public TransactionRecord(int acct, double amt)
    setAccount(acct);
    setAmount(amt);
} // end two-argument TransactionRecord constructor
// set account number
public void setAccount(int acct)
    account = acct;
} // end method setAccount
// get account number
public int getAccount()
    return account;
} // end method getAccount
// set amount
public void setAmount(double amt)
    amount = amt;
} // end method setAmount
// get amount
public double getAmount()
    return amount;
} // end method getAmount
} // end class TransactionRecord -------------------------------------------------------------------------------------------------
// Exercise 14.8: AccountRecord.java
// A class that represents on record of information
package org.egan; // packaged for reuse
import org.egan.TransactionRecord;
public class AccountRecord
private int account;
private String firstName;
private String lastName;
private double balance;
// no-argument constructor calls other constructor with default values
public AccountRecord()
    this(0,"","",0.0); // call four-argument constructor
} // end no-argument AccountRecord constructor
// initialize a record
public AccountRecord(int acct, String first, String last, double bal)
    setAccount(acct);
    setFirstName(first);
    setLastName(last);
    setBalance(bal);
} // end four-argument AccountRecord constructor
// set account number
public void setAccount(int acct)
    account = acct;
} // end method setAccount
// get account number
public int getAccount()
    return account;
} // end method getAccount
// set first name
public void setFirstName(String first)
    firstName = first;
} // end method setFirstName
// get first name
public String getFirstName()
    return firstName;
} // end method getFirstName
// set last name
public void setLastName(String last)
    lastName = last;
} // end method setLastName
// get last name
public String getLastName()
    return lastName;
} // end method getLastName
// set balance
public void setBalance(double bal)
    balance = bal;
} // end method setBalance
// get balance
public double getBalance()
    return balance;
} // end method getBalance
// combine balance and amount
public void combine(TransactionRecord record)
    balance = (getBalance() + record.getAmount());
} // end method combine
} // end class AccountRecord -------------------------------------------------------------------------------------------------
// Exercise 14.8: FileMatch.java
import java.io.File;
import java.io.FileNotFoundException;
import java.lang.IllegalStateException;
import java.util.NoSuchElementException;
import java.util.Scanner;
import java.util.Formatter;
import java.util.FormatterClosedException;
import org.egan.AccountRecord;
import org.egan.TransactionRecord;
public class FileMatch
private Scanner inTransaction;
private Scanner inOldMaster;
private Formatter outNewMaster;
private Formatter theLog;
// enable user to open file
public void openTransFile()
    try
      inTransaction = new Scanner(new File("trans.txt"));
    } // end try
    catch (FileNotFoundException fileNotFoundException)
      System.err.println("Error opening file.");
      System.exit(1);
    } // end catch
} // end method openTransFile
// enable user to open file
public void openOldMastFile()
    try
      inOldMaster = new Scanner(new File("oldmast.txt"));
    } // end try
    catch (FileNotFoundException fileNotFoundException)
      System.err.println("Error opening file.");
      System.exit(1);
    } // end catch
} // end method openOldMastFile
// enable user to open file
public void openNewMastFile()
    try
      outNewMaster = new Formatter("newmast.txt");
    catch (SecurityException securityException)
      System.err.println("You do not have write access to this file.");
      System.exit(1);
    } // end catch
    catch (FileNotFoundException filesNotFoundException)
      System.err.println("Error creating file.");
      System.exit(1);
} // end method openNewMastFile
// enable user to open file
public void openLogFile()
    try
      theLog = new Formatter("log.txt");
    catch (SecurityException securityException)
      System.err.println("You do not have write access to this file.");
      System.exit(1);
    } // end catch
    catch (FileNotFoundException filesNotFoundException)
      System.err.println("Error creating file.");
      System.exit(1);
} // end method openLogFile
// update records
public void updateRecords()
    TransactionRecord transaction = new TransactionRecord();
    AccountRecord account = new AccountRecord();
    try // read records from file using Scanner object
      System.out.println("Start file matching.");
      while (inTransaction.hasNext() && inOldMaster.hasNext())
        transaction.setAccount(inTransaction.nextInt());     // read account number
        transaction.setAmount(inTransaction.nextDouble());   // read amount
        account.setAccount(inOldMaster.nextInt());     // read account number
        account.setFirstName(inOldMaster.next());      // read first name
        account.setLastName(inOldMaster.next());       // read last name
        account.setBalance(inOldMaster.nextDouble()); // read balance
        if (transaction.getAccount() == account.getAccount())
          while (inTransaction.hasNext() && transaction.getAccount() == account.getAccount())
            account.combine(transaction);
            outNewMaster.format("%d %s %s %.2f\n",
            account.getAccount(), account.getFirstName(), account.getLastName(),
            account.getBalance());
            transaction.setAccount(inTransaction.nextInt());     // read account number
            transaction.setAmount(inTransaction.nextDouble());   // read amount
        else if (transaction.getAccount() != account.getAccount())
          outNewMaster.format("%d %s %s %.2f\n",
          account.getAccount(), account.getFirstName(), account.getLastName(),
          account.getBalance());
          theLog.format("%s%d","Unmatched transaction record for account number ",transaction.getAccount());
      } // end while
      System.out.println("Finish file matching.");
    } // end try
    catch (NoSuchElementException elementException)
      System.err.println("File improperly formed.");
      inTransaction.close();
      inOldMaster.close();
      System.exit(1);
    } // end catch
    catch (IllegalStateException stateException)
      System.err.println("Error reading from file.");
      System.exit(1);
    } // end catch
} // end method updateRecords
// close file and terminate application
public void closeTransFile()
    if (inTransaction != null)
      inTransaction.close();
} // end method closeTransFile
// close file and terminate application
public void closeOldMastFile()
    if (inOldMaster != null)
      inOldMaster.close();
} // end method closeOldMastFile
// close file
public void closeNewMastFile()
    if (outNewMaster != null)
      outNewMaster.close();
} // end method closeNewMastFile
// close file
public void closeLogFile()
    if (theLog != null)
      theLog.close();
} // end method closeLogFile
} // end class FileMatch-------------------------------------------------------------------------------------------------
// Exercise 14.8: FileMatchTest.java
// Testing class FileMatch
public class FileMatchTest
   // main method begins program execution
   public static void main( String args[] )
     FileMatch application = new FileMatch();
     application.openTransFile();
     application.openOldMastFile();
     application.openNewMastFile();
     application.openLogFile();
     application.updateRecords();
     application.closeLogFile();
     application.closeNewMastFile();
     application.closeOldMastFile();
     application.closeTransFile();
   } // end main
} // end class FileMatchTest-------------------------------------------------------------------------------------------------
Sample data for master file:
Master file
Account Number            Name                     Balance
100                            Alan Jones                   348.17
300                            Mary Smith                    27.19
500                            Sam Sharp                   0.00
700                            Suzy Green                   -14.22Sample data for transaction file:
Transaction file                    Transaction
Account Number                  Amount
100                                         27.14
300                                         62.11
300                                         83.89
400                                         100.56
700                                         80.78
700                                         1.53
900                                         82.17 -------------------------------------------------------------------------------------------------
My FileMatch class program above has bugs in it.
The correct results for the newmast.txt:
100 Alan Jones 375.31
300 Mary Smith 173.19
500 Sam Sharp 0.00
700 Suzy Green 68.09The correct results for the log.txt:
Unmatched transaction record for account number 400Unmatched transaction record for account number 900------------------------------------------------------------------------------------------------
My results for the newmast.txt:
100 Alan Jones 375.31
300 Mary Smith 111.08
500 Sam Sharp 0.00
700 Suzy Green -12.69My results for the log.txt
Unmatched transaction record for account number 700-------------------------------------------------------------------------------------------------
I am not sure what is wrong with my code above to make my results different from the correct results.
Much help is appreciated. Please help.

From the output, it looks like one problem is just formatting -- apparently you're including a newline in log entries and not using tabs for the newmast output file.
As to why the numbers are off -- just from glancing over it, it appears that the problem is when you add multiple transaction values. Since account.combine() is so simple, I suspect that you're either adding creating transaction objects incorrectly or not creating them when you should be.
Create test input data that isolates a single case of this (e.g., just the Mary Smith case), and then running your program in a debugger or adding debugging code to the add/combine method, so you can see what's happening in detail.
Also I'd recommend reconsidering your design. It's a red flag if a class has a name with "Create" in it. Classes represent bundles of independant state and transformations on that state, not things to do.

Please help with File input!

This is my first time dealing with file I/O and need help figuring out the best way to read in data and store it for further manipulation. I have a file that contains an individual's salary, and 3 product ratings on each line, such as: 75000 01 05 09
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import java.util.*;
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          int inc2total = 0;
          int inc3total = 0;
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          name = keyboard.next();
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                    System.out.println("No such file");
               else
                    System.out.println("That file is not readable.");
                    System.out.println("Enter file name again:");
                    name = keyboard.next();
                    fileObject = new File(name);
          try
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               String trash = "No trash yet";
               while (trash != null)
                    trash = inputStream.readLine();
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          catch(IOException e)
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          try
               BufferedReader inputStream = new BufferedReader(new FileReader(name));
               String trash = "No trash yet";
               while (trash != null)
                    trash = inputStream.readLine();
                    StringTokenizer st = new StringTokenizer(trash);
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                         inc1total++;
                    else if(income<75000)
                         inc2total++;
                    else if(income<100000)
                         inc3total++;
               inputStream.close();
          catch(IOException e)
               System.out.println("Problem reading from file.");
}

Try adding a print statement to see what is happening in your second read loop:
            while (trash != null)
                trash = inputStream.readLine();
                System.out.println("trash = " + trash);
                StringTokenizer st = new StringTokenizer(trash);Another way to read in a while loop:
            while ((trash = inputStream.readLine()) != null)

NFS: server reboot - client problem with "file handle" - no unmont

Hello,
when I restart a NFS-server and a client has a NFS-share on it still mounted, that NFS-share becomes unusable on the client: everything causes the client complain about an old "file handle", even trying to unmount that share!
So my question is: How to deal gracefully with a NFS-server reboot and avoiding this file handle problem?
Apart from going to each client and unmount the NFS-share by hand?
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Do I need to Give these values manually again as they are moved from Env to other?
When we transport ID objects, the values stored in the channel get lost and have to be manually enetered......it happens even for DEV --> QA environment.
Now your channel should reflect PROD-related data.
2- Why my Receiver communiation channel coimg as
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Regards,
Abhishek.

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hello,
I downloaded today jdeveloper 11.1.2.1 for linux and I installed it on my centos 6.2 (like redhat).
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the installation worked fine, but when I tried to modify the JDialog swing file of a view project, I have an error message telling me there are save file errors, and complaining the files handles are too small.
I think the two errors are linked.
I read some stuff on the net and found a tutorial explaining how to have fs.file-max=70000 in sysctl.conf and 30000 when you type ulimit -n, what is also explained in the prerequisites.
so I ran jdeveloper a new time and found the same error.
I opened a terminal, and saw that ulimit -n gives ... 1024.
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can you see an explanation?
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olivier

the resolution is here : [http://publib.boulder.ibm.com/infocenter/dmndhelp/v6rxmx/index.jsp?topic=/com.ibm.wbit.help.install.doc/topics/tincreasehandles.html|http://publib.boulder.ibm.com/infocenter/dmndhelp/v6rxmx/index.jsp?topic=/com.ibm.wbit.help.install.doc/topics/tincreasehandles.html] .
cool!

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One thing that I have been unable to find is just how to keep track of which clips have been used in the timeline, and how many times. In Premiere Pro I had the option to show video and audio usage for each clip in the browser.
Have not found how to do this yet in FCP.
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Kirk

Guess that I just have to get used to how it is done in FCP. I have over 1,500 clips in about 30 folders and it would sure make it easy if I could just glance at a clip in the browser and see if it has been used.
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Hi Experts,
I need code to upload a file without using the upload UI Element. we have our terms and conditions which has to be signed by the user and once the user signs and clicks the next button to go to the next page, I generate a pdf with the time stamp of when the user signed and upload it to ECC. here i can not use the File upload UI Element but have to upload it automatically to ECC.
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Hi,
I dont know why you need to to upload the file for this requirement. You can simply store the user id and the timestamp in portal database table or in a ECC z table.
In case you definitely need to upload the file then you can use KM API to uploadthe file to portal KM folder
http://www.sdn.sap.com/irj/scn/go/portal/prtroot/docs/library/uuid/a099a3bd-17ef-2b10-e6ac-9c1ea42af0e9?quicklink=index&overridelayout=true
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Srini

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FILE Sender to SYNC OB SI.
OB SI Request is my source message type and Response is my final message output type.
OM Source is this Sync OB SI. Target is a SOAP Sync IB SI. Request Mapping program matches the source file message type and target SOAP layout. Response Mapping matches SOAP response and Target is my final file layout.
Routing for Sync OB SI ID uses this OM for Sync IB SI.
SYNC IB SI has Request and REsponse messages mapping the external SOAP call.
When I test the configuration I get success.
When I send messages through I get error in the adapter about this NO_BACK_SYSTEM_IN_HOPLIST (therefore the response message is not making it back into the IE so that it can be mapped again and forwarded).
Complete error message from RWB Adapter Log "Transmitting the message to endpoint http://[myhostname]:[myport]/sap/xi/engine?type=entry using connection SOAP_http://sap.com/xi/XI/System failed, due to: com.sap.engine.interfaces.messaging.api.exception.MessagingException: NO_BACK_SYSTEM_IN_HOPLIST:." and the next line is "Received XI System Error. ErrorCode: NO_BACK_SYSTEM_IN_HOPLIST ErrorText: null ErrorStack: Legacy system to which acknowledgment message is to be sent is missing in hoplist (with wasread=false)"
Any ideas for me? (fyi not using BPM).
Regards, Aaron Myers

Hi AAron,
Looks like this problem has occured before. There are SAP Notes recommended. Below are some helpful links.
http://scn.sap.com/thread/848913
http://scn.sap.com/message/4659941#4659941
Thanks,
Divya.

Help with Files in Java

I need to replace some content in a file . Can some one tell me if we can append or replace only a part of the content in files using Java?
Right now I am using Stringtokenizer, break the file into tokens and put them in a buffer, append the required data and then write to a file. But this seems very crude way of doing it and the output is not as I wanted it.
Please help,
Thanks

"Random" updates to files are possible, but the problem lies when part of a file changes size, with the need to move the rest of it up or down. In general, when part of the file might change size, it's a lot easier all round to create a new version of the file and rename.

PHP disaster with entropy installation need help with file location

I have a mac mini snow leopard server running 10.6.5 ,and I was trying to resolve a mcrypt module issue so that I could install wordpress and magento on some of our sites.After doing what I thought was extensive research, I decided to download the entropy php 5.30-3pkg from Marc Liyanage since it was already compiled and had an automatic install.I had the xcode tools installed and was going to attempt to compile it myself,but did not quite understand the instructions on Michael Gracie's site.When I installed the entropy package it told me that i needed to first disable the existing module,and I attempted to uncheck the php5 module,with no luck,as every time I tried to save it it rechecked itself,which I later discovered was happening because of dependency issues, as I had the mail,wiki,etc services on the sites checked. So my problem is that I wasn't aware at the time of the dependency issue,and I just renamed the module and the file name by putting a # in front of both (Inside the server admin dialog box through the pop up window).I didn't think it would hurt since is was going to be disabled,but now i get blank pages when trying to connect,and can't even see a test.php file, nor can I even locate where they say:
software is supposed to be installed into a new directory /usr/local/php5 on my boot volume. If you ever want to get rid of the package, you only have to remove this directory and a symbolic link called +entropy-php.conf in either /etc/apache2/sites or /etc/apache2/other, depending on whether you run OS X Client or Server.
Any help would be appreciated !

Thank you so much, that works just like i wanted it to as it downloads the file but then i have the problem of the file being called firename.png (or whatever i put in there instead)
using this i changed the code and made it this instead which works 100%
set download to text returned of (display dialog "Enter IGN" default answer "" buttons {"Download", "Cancel"} default button 1)
set the destination to (choose folder)
do shell script "curl -L http://minecraft.net/skin/" & download & ".png" & " -o " & quoted form of ((POSIX path of the destination) & download & ".png")
so i used the input name again with download and added a .png for the extention and now it downloads the file to the locaiton i specify with the name of the user im entering with the correct exention, 100% awesome ^^
Thank you everyone who help me with that issue, grately appreshiated

NEED HELP about file handling and searching

Hi guys !!!!!!!!!!!!!!
A) I need a help from u i wrote this programme to read from the file and assign the lines for the string array.
import java.io.*;
public class ReadFile{
public static void main(String[] args){
int i;
BufferedReader file;
String line() = null;
String fileName = "xx.txt";
          try {
               file = new BufferedReader(new FileReader(fileName));
for(i=1;i<=10;i++){
line(i)= file.readLine();
System.out.println(line(i));
file.close();
          } catch (FileNotFoundException e) {
               System.out.println("File: " + fileName + " not found.");
          } catch(IOException e) {
               System.out.println("Error reading data from file: " + fileName);
the thing is it is compiling but when interpritting it gives the error
Exception in thread "main" java.lang.NullPointerException in line(i)= file.readLine();
plese help me on this and
B) i want to know how to search the string array to find 4 letter words.
i'm taking the each element which is line(i) one at a time and search it.
Plese help me on these issues !!!!!!!!!!!!!!!!!!!!!

You try to create an array with line(i) (as far as i see) but you dont need to keep each line in memory. As far as i understand you just need to process lines sequentially.. (Null pointer exception is thrown because you did not create your array properly!)
Look at this code:
http://www.java-tips.org/java-se-tips/java.io/reading-text-from-a-file.html
You just need to define process method in that code. (and of course try to understand). So as far as i see, you will check for 4-letter words inside process method!
For detecting 4-character word, you need to extract the words in the line using StringTokenizer:
http://www.java-tips.org/java-se-tips/java.util/how-to-use-stringtokenizer.html
Then you can just just use length() method of String class:
http://java.sun.com/j2se/1.3/docs/api/java/lang/String.html
And if you need more advanced logic for processing the lines(currently seems to be the length of strings), you may try regular expressions:
http://java.sun.com/docs/books/tutorial/essential/regex/index.html
http://www.java-tips.org/java-se-tips/java.util.regex/

Help with File.delete()

Hi All!
I am doing the following code:
String indexPath = "Y:/var/session/ZGCoVyCCcooSl1uHRYCAWg.idx";
File idxFile = new File(indexPath);
if(idxFile.exists())
System.out.println(indexPath + " exists.");
else
System.out.println(indexPath + " does not exist.");
boolean idxDeleted = idxFile.delete();
if(!idxDeleted)
System.out.println("could not delete " + indexPath);
if(idxFile.exists())
System.out.println("failed to delete " + indexPath);
When I run this code I get the following output:
Y:/var/session/ZGCoVyCCcooSl1uHRYCAWg.idx exists.
Which means that the file existed and the file is deleted. But, actually file is not deleted. When I try to manually delete the file, I get "sharing violation" error. I am running this code on a Windows 2000 server system and JDK1.4. I appreciate any help.
thanks,
Padma.

That IS strange. I don't have a Win2K server to test on, but I know Win2K Pro (at a client's site) seems incredibly slow at a lot of things, like when working with WinExporer. Someone told me it had to do with a configuration option. Perhaps there is something in the config telling your server to defer file deletes, e.g. "lock" the (to be)deleted file so no one can access it, mark it for deletion, but defer until later during a lull when all pending deletes can be batched at once. That would explain why you can see it, but not access it, and it goes away after some time. Then again, I might be TOTALLY out in left field... :(

Help with File I/O Program

hey guys. Just finished writing this program for fun and to test myself, because I just learned the File I/O chapter of a book that I bought in an attempt to teach myself java :). This program SHOULD take a users input and change it into binary form and then show them. Here is my code. It is to the best of MY ability. It compiles perfectly and works except for the fact that it doesnt show up in binary form. you will see once u compile it. there are two files, the main class and the methods class.
Main Class:
public class TextToBinaryChanger extends Methods
public static void main(String args[])
Methods.Greeting();
Methods.WriteUserInputToFile();
Methods.readFromUserInputFile();
Methods.askIfExitProgram();
here is the Methods Class:
import javax.swing.*;
import java.io.*;
public class Methods
public static void Greeting()
JOptionPane.showMessageDialog(null,"Welcome to \"Binary Changer 1.0\"!");
public static void WriteUserInputToFile()
try
DataOutputStream WriteUserInput = new DataOutputStream(new FileOutputStream("UserInput.dat"));
PrintWriter WriteUserInputSave = new PrintWriter(new FileOutputStream("UserInputSave.txt"));
String askUserForInput = JOptionPane.showInputDialog("Please enter in the text that you would like to have changed to binary form");
JOptionPane.showMessageDialog(null, "The text you entered in was: " + askUserForInput);
WriteUserInput.writeUTF(askUserForInput);
WriteUserInput.close();
catch (NullPointerException e)
JOptionPane.showMessageDialog(null, "Null has been entered, ending program");
System.exit(0);
catch (FileNotFoundException e)
JOptionPane.showMessageDialog(null, "This file was not found, ending program");
System.exit(0);
catch (IOException e)
JOptionPane.showMessageDialog(null, "Error, program ending now");
System.exit(0);
public static void readFromUserInputFile()
try
DataInputStream showToUser = new DataInputStream(new FileInputStream("UserInput.dat"));
BufferedReader showToUserSave = new BufferedReader(new FileReader("UserInputSave.txt"));
JOptionPane.showMessageDialog(null, "You had first entered in:" + showToUserSave.readLine());
JOptionPane.showMessageDialog(null, "Your text in Binary Form:" + showToUser.readUTF());
showToUserSave.close();
showToUser.close();
catch (NullPointerException e)
JOptionPane.showMessageDialog(null, "Null has been entered, ending program");
System.exit(0);
catch (FileNotFoundException e)
JOptionPane.showMessageDialog(null, "This file was not found, ending program");
System.exit(0);
catch (IOException e)
JOptionPane.showMessageDialog(null, "Error, program ending now");
System.exit(0);
public static void askIfExitProgram()
String askUserIfExit = JOptionPane.showInputDialog("To run this program again, please enter in 'yes'. To exit enter in 'no'");
try
if (askUserIfExit.equalsIgnoreCase("yes"))
WriteUserInputToFile();
else
JOptionPane.showMessageDialog(null, "Thank you for using Binary Changer 1.0!");
System.exit(0);
catch (NullPointerException e)
JOptionPane.showMessageDialog(null, "Null has been entered, ending program");
System.exit(0);
Any help is very much appreciated. laterz,
Lance

// public because it doesn't matter
// static because it doesn't depend on any instance variables (just trust me)
// It will return a String representating the binary form of the data
// takes a String parameter
public static String toBinary(String data)
    // initialise a blank string to append to
    String toReturn = "";
    // we want to loop through each char of the string data
    for(int i=0;i<data.length();i++)
        // this line is complex
        // start from the right, and work left.
        // 1 - data.charAt(i)
        // this returns the char at index i in the string data
        // 2 - (int)data.charAt(i)
        // cast the char as an int so we can convert using existing methods
        // 3 - Integer.toBinaryString((int)data.charAt(i))
        // convert that int into a binary string
        String binary = Integer.toBinaryString((int)data.charAt(i));
        // say we converted the int 5, the string we got back would be "1001"
        // but I know that a char is 16bit, so I want to pad the start of it with zeroes
        // so while the string is shorted than 16, add a 0 to the start
        while(binary.length()<16)
            binary = "0" + binary;
        // add this onto our string that we will return
        // as well as a space so that it looks slightly formatted
        toReturn += binary + " ";
    return toReturn;
}Understand?
Cheers,
Radish21

Help with file handling

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