Remove Arrows from Swing Scrollbar in JScrollPane

Question

I would like to remove the scrollbar arrow buttons from a scrollbar in a JScrollPane. How would I do this?

Answer 1

This is the way i went.

1. Set the scrollbar policy of the scrollbar you want to hide as never
2. Mimic this behavior with a MouseWheelListener

This method:

• Is fast to implement with very few lines of code.
• Retains the benefits of the L&F.
• Will remove both the buttons and the bar.

Below is a sample code for removing the verticall scroll bar.

JScrollPane myScrollPane = new JScrollPane();

//remove the scroll bar you don't want
myScrollPane.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_NEVER);

JTextPane myJTextArea = new JTextPane();

//myScrollPane.setViewportView(myJTextArea);

myScrollPane.addMouseWheelListener(new MouseWheelListener() {

   //this will mimick the behavior of scrolling
   public void mouseWheelMoved(MouseWheelEvent e) {
            JScrollBar scrollBar =  myScrollPane.getVerticalScrollBar();
            //capturing previous value
            int previousValue = scrollBar.getValue();

            int addAmount;

            //decide where the wheel scrolled
            //depending on how fast you want to scroll
            //you can chane the addAmount to something greater or lesser

            if(e.getWheelRotation()>0) {
                addAmount = 2;
            }else {
                addAmount = -2;
            }

            //set the new value 
            scrollBar.setValue(previousValue + addAmount);
        }
    });