How to save a txt file using JFileChooser?

Question

Given this method :

public void OutputWrite (BigInteger[] EncryptCodes) throws FileNotFoundException{

    JFileChooser chooser = new JFileChooser();

    chooser.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);  
    chooser.showSaveDialog(null);

    String path = chooser.getSelectedFile().getAbsolutePath();

    PrintWriter file = new PrintWriter(new File(path+"EncryptedMessage.txt"));

    for (int i = 0; i <EncryptCodes.length; i++) { 
        file.write(EncryptCodes[i]+ " \r\n");     
    }
    file.close();
}

Ignoring the variable names, what this method does is writes data of EncryptCodes in the txt file generated inside the project folder called EncryptedMessage.txt.

What I need is a method to save that txt file instead of in the project folder , to be saved in a location specified by the user during running (Opens a Save As Dialog Box). I think it can be done by JFilechooser, but I can't get it to work.

Reimeus · Answer 1 · 2016-03-17T00:42:28.820

4

You could add a separate method for getting the save location like so:

private File getSaveLocation() {
   JFileChooser chooser = new JFileChooser();
   chooser.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);  
   int result = chooser.showSaveDialog(this);

   if (result == chooser.APPROVE_OPTION) { 
      return chooser.getSelectedFile();
   } else {
      return null;
   }
}

and then use the result as an argument to the overloaded File constructor that takes a parent/directory argument:

public void writeOutput(File saveLocation, BigInteger[] EncryptCodes)
                 throws FileNotFoundException {

   PrintWriter file = 
        new PrintWriter(new File(saveLocation, "EncryptedMessage.txt"));
   ...
}

edited Mar 17 '16 at 00:42

answered Dec 16 '12 at 21:07

Reimeus

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Yes.. perfect, but the phrase "this" presents an error. method showSaveDialog in class JFileChooser cannot be applied to given types; required: Component found: RSAEncryption reason: actual argument RSAEncryption cannot be converted to Component by method invocation conversion ---- – user1111726 Dec 16 '12 at 21:17
Ok, you need a `JFrame` argument there. If you're only using the `JFileChooser` in a console app, you can simply use `null` here. – Reimeus Dec 16 '12 at 21:20

score 0 · Answer 2 · answered Dec 16 '12 at 20:47

0

like this?

PrintWriter file = new PrintWriter(new File(filePathChosenByUser + "EncryptedMessage.txt"));

answered Dec 16 '12 at 20:47

Theolodis

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the file path should be choosen by user during runtime – user1111726 Dec 16 '12 at 20:49
well, then you'll have to fill `filePathChosenByUser` at runtime? – Theolodis Dec 16 '12 at 20:52
If i understood you correctly, You need the user to actually write the path when its asked for, what i need is a Dialog box to open at run time, and for the user to select the directory – user1111726 Dec 16 '12 at 20:54
I am pretty sure if you implement an explorer it will be able to return the chosen path as string. – Theolodis Dec 16 '12 at 20:57
1

so were back to the question.. how do i do that ? – user1111726 Dec 16 '12 at 21:06
Oh sorry, I guess I missunderstood your question :S Well, at least you have a solution now :) – Theolodis Dec 16 '12 at 21:12

How to save a txt file using JFileChooser?

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