JScrollPane does not work

Question

Here is a code of a simple editor.

public class editor {
    public static void main(String[] args) {
        JFrame f = new JFrame();
        final JTextArea area = new JTextArea(20,120);
        JScrollPane scrollingResult = new JScrollPane(area,JScrollPane.VERTICAL_SCROLLBAR_ALWAYS, JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);
        f.getContentPane().add(scrollingResult);
        ...
    }
}

This doesn't work. JTextArea is fine, so is the Frame, but JScrollPane is still disabled. Why could that be?

Answer 1

You have just created a JTextArea and added it to a JScrollPane. However I cannot see any text being added to your JTextArea. The scroll option activates only when you have something to scroll through.

Also I would suggest that you change your HorizontalScrollBarPolicy and VerticalScrollBarPolicy from being JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS & JScrollPane.VERTICAL_SCROLLBAR_ALWAYS to HORIZONTAL_SCROLLBAR_AS_NEEDED and VERTICAL_SCROLLBAR_AS_NEEDED respectively.