java - Separator between header and data in a JTable -

i build simple jtable has no gridlines apart single horizontal separator between table header , table data. separator should span entire width of table jseparator. have managed achieve desired appearance using jlabels , jseparator placed within gridbaglayout, result unwieldy , can't feel more concise solutions exist (perhaps using matteborder?). appreciated!

edit: solution can achieved using single line of code:

table.gettableheader().setborder(new matteborder(0,0,1,0, color.black)); 

you did similar:

1. create tablecellrenderer.

   tablecellrenderer renderer = new defaulttablecellrenderer() {      final jlabel headerlabel = new jlabel();     {         //setborder(borderfactory.createemptyborder());         headerlabel.setborder(borderfactory.creatematteborder(0, 0, 3, 0, color.red));         headerlabel.setopaque(true);         headerlabel.setbackground(color.white);     }      @override     public component gettablecellrenderercomponent(jtable table,             object value,             boolean isselected,             boolean hasfocus,             int row,             int column) {         if (row == -1) {             label.settext(value.tostring());             return headerlabel;         }         return super.gettablecellrenderercomponent(table, value, isselected, hasfocus,                   row, column);     }  }; 

2. use table header (row == -1). 1 used cells.

   for (int = 0; < model.getcolumncount(); ++i) {      table.gettableheader().getcolumnmodel().getcolumn(i).setheaderrenderer(renderer); } 

3. either use

   table.showhorizontallines(false); table.showverticallines(false); 

4. or

   table.setgridcolor(color.white); 

i use cell renderer header, following might suffice:

    defaulttablecellrenderer renderer = new defaulttablecellrenderer();     renderer.setborder(borderfactory.creatematteborder(0, 0, 3, 0, color.red));     renderer.setopaque(true);     renderer.setbackground(color.white);