How can I take the largest and smallest value and paint the whole picture? Visual Java Netbeans

It is in Netbeans 8.2, in visual, and I want to paint the row where the greater value appears and paint with another color the smaller value, in the Jtable, my question as I do it, nothing else I know that it is with a for , but I do not know, what else? could you help me please =)

   ColorCeldas celdas = new ColorCeldas(jTabMonetario);

   for (int r=0; r<jTabMonetario.getRowCount();r++)
        for (int c=0; c<jTabMonetario.getColumnCount(); c++)