Merged Header Above a JTable Header in Java
问题 I would like to put some extra merged cells for grouping reasons on the top of my table header. I found something similar to this, answered in thislink from this forum, but also what I need exactly seem to be here that is not answered (.NET) link2. So If I am not clear I attach a picture of what I would like to appear. I have the columns and I need to make appear these super-columns that I have drawn in the picture. Any help? 回答1: try the Groupable Table Header example given here or here 回答2: