Help needed badly with coloring of specific cells in a tble

Question

I have an existing table and when this code, it colors all the cells in a column. Hoe can I use the funktion getCellRenderer: to color only one cell at a time and implement it in an already existing table.
THX for any help I can get :)
ColorRenderer cell=new ColorRender();
// for(int i=0;i<table.getModel().getColumnCount();i++){
// TableColumn mod=this.getColumn((this.getModel().getColumnName(i)));
mod.setCellRenderer(cell);
And ur ColorRender calss should override DefaultTableCellRenderer like this
class ColorRenderer extends DefaultTableCellRenderer {
protected int align;
public ColorRenderer(int align) {
this.align=align;
public Component getTableCellRendererComponent(JTable table,
Object value, boolean isSelected, boolean hasFocus, int row,
int column) {
setHorizontalAlignment(align);
super.getTableCellRendererComponent(table, value, isSelected,
hasFocus, row, column);
if(col==4){
setBackground(Color.cyan);
return this;
}

Answer 1

Here's a bit of Friday Fun: before you run this code, what do you think the table will look like?
What will it look like as you click and drag on it to select cells?
import java.awt.*;
import javax.swing.*;
import javax.swing.table.*;
public class X {
    static class R extends DefaultTableCellRenderer {
        public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
            Component that = super.getTableCellRendererComponent(table, value, isSelected, hasFocus, row, column);
            Color bk = that.getBackground();
            that.setBackground((row + column)%2==0? bk.darker() : bk.brighter());
            return that;
    public static void main(String[] args) {
        JTable table = new JTable(20,10);
        table.setDefaultRenderer(Object.class, new R());
        JFrame f = new JFrame("X");
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.getContentPane().add(new JScrollPane(table));
        f.setSize(400, 300);
        f.setLocationRelativeTo(null);
        f.setVisible(true);