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

public class ChangeColumnName{
	JTable table;
	public static void main(String arg[]){
		new ChangeColumnName();
	}

	public ChangeColumnName(){
		JFrame frame = new JFrame("Changing Column Name!");
		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);
		table = new JTable(model);
		ChangeName(table,0,"Stu_name");
		ChangeName(table,2,"Paper");
		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);
	}

	public void ChangeName(JTable table, int col_index, String col_name){
		table.getColumnModel().getColumn(col_index).setHeaderValue(col_name);
	}
}