Render a single cell in a table using Java

I have a sample code creating a simple uitable object and trying to render one of its cells. The code is running with no exceptions but the cell's color does not change. Any ideas what might be the problem?

import java.util.*;

import javax.swing.*;

import javax.swing.table.*;

import java.awt.*;

f = figure;

hTable = uitable(f,'Data',randi(100,10,3));

jScroll = findjobj(hTable);

jTable = jScroll.getViewport.getView;

row = 1;

col = 1;

renderer = jTable.getCellRenderer(row, col);

value = jTable.getValueAt(row, col);

comp = renderer.getTableCellRendererComponent(...

jTable, value, false, false, row,...

col);

comp.setBackground(Color(1,1,0));

column = jTable.getColumnModel().getColumn(col);

column.setCellRenderer(comp);