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Dec 7th, 2008
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Exporting multiple Strings to a text file?

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Hi guys,

I am a beginner to Java (I'm only a freshman in high school) and I'm working on a project which involves the need for me to be able to store 11 different strings as a text file. I have it storing the strings with multiple lines so I set a string newLine = System.getProperty("line.separator");

The part that is screwing up is this:
Java Syntax (Toggle Plain Text)
  1.         try {
  2.             Writer outputStream = new BufferedWriter(new FileWriter(outputLocation + "\\" + outputFile));
  3.             //print text to file
  4.             outputStream.write(cloudOut1 + cloudOut2 + cloudOut3 + cloudOut4 + cloudOut5 + cloudOut6 + cloudOut7 + cloudOut8 + cloudOut9 + cloudOut10 + cloudOut11);
  5.             }catch (Exception e) {
  6.             JOptionPane.showMessageDialog (
  7.             null,
  8.             "Error in writing data!!\n\r" + e,
  9.             "File Save Error",
  10.             JOptionPane.ERROR_MESSAGE);
  11.         }

Everywhere I've looked, I find sites saying that I should do it the way that's written above. I think that if I find out how to write a text file one line at a time, I might be able to make it work because I think that the newLine's are messing it up...

Thanks for your help,

~Ankush

P.S: If you need the code for everything that I'm using:
Java Syntax (Toggle Plain Text)
  1.     public static String cloudOut1, cloudOut2, cloudOut3, cloudOut4, cloudOut5, cloudOut6, cloudOut7, cloudOut8, cloudOut9, cloudOut10, cloudOut11;
  2.     public static String newLine = System.getProperty("line.separator");
  3.     public static File outputFile, outputLocation;
  4.         try{
  5.             outputLocation = saveLocation.getCurrentDirectory();
  6.             outputFile = saveLocation.getSelectedFile();
  7.         }catch (Exception e) {
  8.         JOptionPane.showMessageDialog (
  9.         null,
  10.         "Error in writing data!!\n\r"+e,
  11.         "File Save Error",
  12.         JOptionPane.ERROR_MESSAGE);
  13.         }
  14.  
  15.         System.out.println(outputLocation);
  16.  
  17.  
  18.         try{
  19.             cloudOut1 = "In order to " + promptA.A + ", I must " + promptB.B + "." + newLine;
  20.             cloudOut2 = "In order to " + promptB.B + ", I must " + promptD.D + "." + newLine + newLine;
  21.             cloudOut3 = "On the other hand, In order to " + promptA.A + ", I must " + promptC.C + "." + newLine;
  22.             cloudOut4 = "In order to " + promptC.C + ", I must " + promptDPrime.DPrime + "." + newLine;
  23.             cloudOut5 = "I can't both " + promptD.D + " and " + promptDPrime.DPrime + "." + newLine;
  24.  
  25.             cloudOut6 = newLine + "In order to " + promptB.B + ", I must " + promptD.D + " because:"  + newLine + promptBDAssump.BDAssump + newLine ;
  26.             cloudOut7 = "Injection:  " + promptBDInjection.BDInjection;
  27.  
  28.             cloudOut8 = newLine + "In order to " + promptC.C + ", I must " + promptDPrime.DPrime + " because:" + newLine + promptCDPrimeAssump.CDPrimeAssump + newLine ;
  29.             cloudOut9 = "Injection:  " + promptCDPrimeInjection.CDPrimeInjection ;
  30.  
  31.             cloudOut10 = newLine + "I can't both " + promptD.D + " and " + promptDPrime.DPrime + " because:"  + newLine + promptDDPrimeAssump.DDPrimeAssump + newLine ;
  32.             cloudOut11 = "Injection:  " + promptDDPrimeInjection.DDPrimeInjection;
  33.             }catch (Exception e) {
  34.         JOptionPane.showMessageDialog (
  35.         null,
  36.         "Error in writing data!!\n\r"+e,
  37.         "File Save Error",
  38.         JOptionPane.ERROR_MESSAGE);
  39.         }
  40.  
  41.         System.out.println(cloudOut1 + cloudOut2 + cloudOut3 + cloudOut4 + cloudOut5 + cloudOut6 + cloudOut7 + cloudOut8 + cloudOut9 + cloudOut10 + cloudOut11);
  42.  
  43.         try {
  44.             Writer outputStream = new BufferedWriter(new FileWriter(outputLocation + "\\" + outputFile));
  45.             //print text to file
  46.             outputStream.write(cloudOut1 + cloudOut2 + cloudOut3 + cloudOut4 + cloudOut5 + cloudOut6 + cloudOut7 + cloudOut8 + cloudOut9 + cloudOut10 + cloudOut11);
  47.             }catch (Exception e) {
  48.             JOptionPane.showMessageDialog (
  49.             null,
  50.             "Error in writing data!!\n\r" + e,
  51.             "File Save Error",
  52.             JOptionPane.ERROR_MESSAGE);
  53.         }
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amgupt01 is offline Offline
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Dec 7th, 2008
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Re: Exporting multiple Strings to a text file?

Hello, amgupt01
You can use this:
java Syntax (Toggle Plain Text)
  1. PrintWriter writer =new PrintWriter("yourfile");
  2. writer.println("Line to print");
Last edited by Antenka; Dec 7th, 2008 at 1:28 pm.
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Re: Exporting multiple Strings to a text file?

Click to Expand / Collapse  Quote originally posted by Antenka ...
Hello, amgupt01
You can use this:
java Syntax (Toggle Plain Text)
  1. PrintWriter writer =new PrintWriter("yourfile");
  2. writer.println("Line to print");
Thanks for your response!

I tried this and all that it does is make a blank file... It has the right filename (I just made it print.txt), but the file is completely blank... Even when I tried writing something like "testing" in quotation marks instead of using the strings that I need to, the output just is a blank file with the name print.txt...

I can't think of what the problem is...
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amgupt01 is offline Offline
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Re: Exporting multiple Strings to a text file?

http://java.sun.com/j2se/1.4.2/docs/...intWriter.html

Look at the API. Do you see a constructor for PrintWriter that takes a String as an argument? (Change your code so that your PrintWriter takes the correct argument)

You might want to look at this link, since from the API, it isn't immediately obvious which type of Object to create: http://java.sun.com/docs/books/tutor...tTogether.html

Or, here's a quick example,

PrintWriter writer = new PrintWriter(new FileWriter("yourFile.txt"));
Last edited by BestJewSinceJC; Dec 7th, 2008 at 2:10 pm.
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Re: Exporting multiple Strings to a text file?

ooops
sorry for misleading
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Antenka is offline Offline
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Re: Exporting multiple Strings to a text file?

Its cool, Antenka. Everybody makes mistakes. What I usually do before responding is quickly check the API to make sure my response coincides with what I see there.
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BestJewSinceJC is offline Offline
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Re: Exporting multiple Strings to a text file?

hmm... I tried the way BestJew showed and it still gives me a blank file...

I don't understand what's wrong with it though... I had, in fact already tried BestJew's way before I posted this and it didn't work so I just tried a bunch of other stuff...

Thanks for your help though...

~Ankush
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amgupt01 is offline Offline
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Dec 8th, 2008
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Re: Exporting multiple Strings to a text file?

Maybe you should try to do this:
java Syntax (Toggle Plain Text)
  1. writer.flush();
P.S. And in conclusion, don't forget to close your writer after working with it
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Re: Exporting multiple Strings to a text file?

In the code posted I don't see the stream/writer being closed. Variable names like cloudOut1 through cloudOut11 suggest there is something seriously wrong with your design. Try writing out a small and compilable test case which illustrates the problem at hand at post it here.
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~s.o.s~ is offline Offline
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Dec 17th, 2008
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Re: Exporting multiple Strings to a text file?

Click to Expand / Collapse  Quote originally posted by BestJewSinceJC ...
http://java.sun.com/j2se/1.4.2/docs/...intWriter.html

Look at the API. Do you see a constructor for PrintWriter that takes a String as an argument? (Change your code so that your PrintWriter takes the correct argument)
Since the release of 1.5 the PrintWriter class does have a constructor that can take a String representation of a filename .
http://java.sun.com/j2se/1.5.0/docs/...intWriter.html

Antenka hit the nail on the head with the invocation of the flush() method.
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gprest is offline Offline
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This thread is more than three months old

No one has posted to this discussion for at least three months. Please let old threads die and do not reply to them unless you feel you have something new and valuable to contribute that absolutely must be added to make the discussion complete. Otherwise, please start a new thread in this forum instead.
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