import javax.swing.*;
import javax.swing.table.*;
import java.awt.*;

public class AppendColumn{
	public static void main(String[] args) {
		new AppendColumn();
	}

	public AppendColumn(){
			JFrame frame = new JFrame("Appending Column Example!");
			frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
			JPanel panel = new JPanel();
			String data[][] = {{"Vinod","MCA","Computer"},{"Deepak","PGDCA","History"},{"Ranjan","M.SC.","Biology"},{"Radha","BCA","Computer"}};
			String col[] = {"Name","Course","Subject"};
			DefaultTableModel model = new DefaultTableModel(data,col);
			model.addColumn("Grade");
			JTable table = new JTable(model);
			JTableHeader header = table.getTableHeader();
			header.setBackground(Color.yellow);
			JScrollPane pane = new JScrollPane(table);
			panel.add(pane);
			frame.add(panel);
			frame.setUndecorated(true);
			frame.getRootPane().setWindowDecorationStyle(JRootPane.PLAIN_DIALOG);
			frame.setSize(500,150);
			frame.setVisible(true);
	}
}