How can I display the contents of a file

[ksparwez]

Hi all,
I have a task which involves opening a Java Source file into a text area. Iam trying to use the Input and Output streams to do so. Will this work out? If so could anyone please tell me how. How should I use the Inputstream to capture the contents of the file and then How should I Display the contents in a text area. Later on I should be able to modify the contents of the text area. Can anyone please tell me how to do this?
Thanx
Parwez

[Carl Trusiak]

Here is an example that's available with JBuilder 3.0.

  void openFile(String fileName)  {
    try
    {
      // Open a file of the given name.
      File file = new File(fileName);
      // Get the size of the opened file.
      int size = (int)file.length();
      // Set to zero a counter for counting the number of
      // characters that have been read from the file.
      int chars_read = 0;
      // Create an input reader based on the file, so we can read its data.
      // FileReader handles international character encoding conversions.
      FileReader in = new FileReader(file);
      // Create a character array of the size of the file,
      // to use as a data buffer, into which we will read
      // the text data.
      char[] data = new char[size];
      // Read all available characters into the buffer.
      while(in.ready()) {
        // Increment the count for each character read,
        // and accumulate them in the data buffer.
        chars_read += in.read(data, chars_read, size - chars_read);
      }
      in.close();
      // Create a temporary string containing the data,
      // and set the string into the JTextArea.
      jTextArea1.setText(new String(data, 0, chars_read));
      // Cache the currently opened filename for use at save time...
      this.currFileName = fileName;
      // ...and mark the edit session as being clean
      this.dirty = false;
      // Display the name of the opened directory+file in the statusBar.
      statusBar.setText("Opened "+fileName);
      updateCaption();
    }
    catch (IOException e)
    {
      statusBar.setText("Error opening "+fileName);
    }
  }

Hope this helps

[Harish Kashyap]

here's solution for u
try{
BufferedReader in = new BufferedReader(new FileReader(filename));
while((str=in.readLine())!=null)
textarea.append("\n"+str);
in.close();
}catch(IOException e)
{textarea.setText(e.getMessage());}
this much will work.
harish