I'm using JsplitPane. I'm using Netbeans gui designer tool. i have put in it two JPanels one whom contains three JPanels, i got a white space, with setting
her is an image illustrates what i want to do:
(source: gulfup.com)
Read the section from the Swing tutorial on How to Use GridBagLayout, especially the section on using the weightx/weighty
constraints for the solution to your problem.