getting a button(open) to trigger the file chooser

[ugo okoye]

Hi, i've designed a text editor but i can't seem to get my File Open, Save Buttons to function properly.can anyone tell me which classes i need to get them work. appreciate the help.

[Michael Dunn]

http://java.sun.com/docs/books/tutorial/uiswing/components/filechooser.html

[ugo okoye]

thanks man, but i need another favour. can you tell me how to effect a save because the books i have seem to talk about char and byte being written to my memory.i was wondering how i could get to save a document without having to pass the name of a file like ("file.txt").

[Thorsten Klonk]

First, you must implement the ActionListeners to call the methods for opening or saving the files.

JButton openButton = new JButton("Open");
openButton.addActionListener(new ActionListener() {
   public void actionPerformed(ActionEvent e){
      openCommand();
   }
});

(Already done? - For sure.)

The next step for opening a specific file is to implement the method for opening the file:

    
void openCommand(){
   textArea.setText(""); // clear your JTextArea.
   // Next steps is for showing the FileDialog
   FileDialog file = new FileDialog (TextEdit.this, "Open File",
                                     FileDialog.LOAD);
   file.setFile ("*.java;*.txt");  // Set initial filename filter
   file.setVisible(true);
   
   String currentFile;
   if ((currentFile = file.getFile()) != null) {
      String fileName = file.getFile() + currentFile;
      char[] data;
      setCursor (Cursor.getPredefinedCursor(Cursor.WAIT_CURSOR));
      // Now setting the actual file for opening:
      File f = new File(filename);
      byte toOpen;
      String text = "";
      try {
         // read the file (Text is saved in bytes)
         FileInputStream fis = new FileInputStream(f);
         do{
           toOpen = (byte)fis.read();
   text += (char)toOpen;
 } while(toOpen != -1);
         fis.close();
         // Here is the text for displaying in JTextArea:
         textArea.setText(text);
      } catch (FileNotFoundException e) {
         e.printStackTrace();
      } catch (IOException e) {
 e.printStackTrace();
      }
    
   }
   setCursor (Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR));
}

If you understood the way of opening files, you could implement methods for saving files easily

Greetings,
Thorsten