jfilechooser{resolved}

[System_Error]

How would you open a (text)file and display it's contents in a jtextarea?

[CornedBee]

Open the file using a FileReader or perhaps FileInputStream + InputStreamReader (if the encoding is weird). Read it completely in. Set the text of the JTextArea using setText(String).

[System_Error]

I should have been a little more clear with the question. I want the user to choose a file using the jfilechooser or showdialog method and then display the file in the textarea. Would I still use the FileReader in this case? That is after I get the selected file the user wants to view?

[CornedBee]

Yes. The JFileChooser only comes in when selecting the file name of the file to load.

[System_Error]

Thank you so much for your help.

[System_Error]

O.K. I just got everything working and now it's only reading one line of the file. I want it to read the whole thing. Could someone please see what I need to do?

public void processOpen()
 {
	 /* process Opening a new file
	 */
	 BufferedReader br = null;
	 StringTokenizer st;
	 JFileChooser chooser = new JFileChooser();
	 int returnVal = chooser.showOpenDialog(this);
	 String getFile = chooser.getSelectedFile().getPath();
	 if(returnVal == JFileChooser.APPROVE_OPTION)
	 {
		 try {
			 FileReader filegetter = new FileReader(getFile);
			 br = new BufferedReader(filegetter);
			 String line = br.readLine();
			 st = new StringTokenizer(line);
			 while (st.hasMoreTokens())
			 {
			 textArea2.append(st.nextToken());
			 }
		 }
		 catch (FileNotFoundException ex)
		 {
			 ex.printStackTrace();
		 }
		 catch (Exception myE)
		 {
			 myE.printStackTrace();
		 }
		 finally
		 {
			 try{
				 if (br != null)
				 {
					 br.close();
				 }
			 }
			 catch(IOException io)
			 {
				 io.printStackTrace();
			 }
		 }
	 }
	 
 }

[CornedBee]

You need to call readLine in a loop.

[System_Error]

Could you give me a pointer on what the loops suppose to look like? I don't know really know how to go about it.

[CornedBee]

Here's how to get all of a file into a string:

	Reader r = new InputStreamReader(new BufferedInputStream(
		new FileInputStream("obj.xml")), Charset.forName("UTF-8"));
	char[] buffer = new char[1024];
	StringBuffer loaded = new StringBuffer();
	int res;
	do {
		res = r.read(buffer);
		if(res > 0) {
			loaded.append(buffer, 0, res);
		}
	} while(res == 1024);
	buffer = null;
	String content = loaded.toString();

A few notes:
1) I chose to do the buffering before the stream->reader conversion. It shouldn't really matter either way.
2) This code loads UTF-8 files. If that's not what you want (text files in Windows are saved as Windows-1215 or something like that by default), you need to change the value in the Charset.forName call.
3) For large files, this requires a very large amount of memory. It might be wise to do the parsing chunkwise in some fashion and discard the chunk afterwards.

[System_Error]

Thank you so much for taking your time to help me.

[System_Error]

I found an even easier solution:

 JFileChooser chooser = new JFileChooser();
	 int returnVal = chooser.showOpenDialog(this);
	 String getFile = chooser.getSelectedFile().getPath();
	 try {
		 textArea2.read(new FileReader(getFile),null);
	 }
	 catch(IOException e)
	 {
		 e.printStackTrace();
	 }