i was able to remove the title bar from the JInternalFrame but i don\'t know how to remove the borders.
JInternalFrame
To remove the border simply call frame.setBorder(null);
frame.setBorder(null);
Any border that is null is simply not shown.
null
To remove all borders, simply call:
this.setBorder(javax.swing.BorderFactory.createEmptyBorder(0, 0, 0, 0));