Adding a scrollbar to a JScrollPane

[chanshaw]

I'm trying to add a verticle scroll bar to my scrollPane so it can go up and down the list as needed what sort of lines do I need to add to get this to work.

   private void refreshScrollPane(int panel)
   {
       if(panel == 1)
       {
           directoryPanelA.remove(scrollPane1);
           invalidate();
           scrollPane1 = new JScrollPane(directoryAList);
           directoryPanelA.add(scrollPane1);
       }
       if(panel == 2)
       {
           directoryPanelB.remove(scrollPane2);
           invalidate();
           scrollPane2 = new JScrollPane(directoryBList);
           directoryPanelB.add(scrollPane2);
       }
   }

[JosAH]

My guess is that you're abusing a JScrollPane, i.e. that thing already implements scrollbars, either when needed or always visibile. I don't think I understand your question.

kind regards,

Jos

[chanshaw]

I'm not sure what you do not understand here. I'll try and be a little more specific (not used to typing out my questions I guess). Ok so I have a scrollpane which holds a JList.. this code refreshes the scroll pane removes the scrollPane component adds the list to it then re-adds the scrollPane to the component. I want it to have a scroll bar on the right hand side that is verticle that allows me to scroll through the jlist that's in the scrollpane. Wow I hope that explained it a little more haha thanks.

   private void refreshScrollPane(int panel)
   {
       if(panel == 1)
       {
           directoryPanelA.remove(scrollPane1);
           invalidate();
           scrollPane1 = new JScrollPane(directoryAList);
           directoryPanelA.add(scrollPane1);
       }
       if(panel == 2)
       {
           directoryPanelB.remove(scrollPane2);
           invalidate();
           scrollPane2 = new JScrollPane(directoryBList);
           directoryPanelB.add(scrollPane2);
       }
   }

[JosAH]

@chanshaw
Again, you don't have to take care of that; just add your JList to a JScrollPane, add that pane to, say, the content panel of a JFrame and you're in business. The JScrollPane takes care of those scroll bars.

kind regards,

Jos

[chanshaw]

Ok perfect, thanks for the information.