Make parts of a JTextArea non editable (not the whole JTextArea!)

Question

I\'m currently working on a console window in Swing. It\'s based on a JTextArea and works like a common command line. You type a command in one line and press enter. In the

Answer 1

What about that, when ">> " is the beginning of every line in the command line where the user can input a command:

textArea.addKeyListener(new KeyAdapter() {

    public void keyPressed(KeyEvent event) {

        int code = event.getKeyCode();          
        int caret = textArea.getCaretPosition();
        int last = textArea.getText().lastIndexOf(">> ") + 3;

        if(caret <= last) {

            if(code == KeyEvent.VK_BACK_SPACE) {

                textArea.append(" ");

                textArea.setCaretPosition(last + 1);
            }

            textArea.setCaretPosition(textArea.getText().length());
         }
     }
 });