How to use table demo program

#  Table Demo Program


//*************************Start**********************

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

public class tabledemo extends JFrame {

    JTable t1;

    public tabledemo() {
        Container c = getContentPane();
        c.setLayout(new GridLayout(2, 1));
        String col[] = {"Rollno", "Name", "Class"};
        String data[][] = {{"1", "ajay", "fyit"}, {"2", "kunal", "syit"}, {"1", "sanjay", "fyit"}};
        t1 = new JTable(data, col);
        c.add(t1.getTableHeader());
        c.add(t1);
        pack();
        setVisible(true);
    }
     public static void main(String arsg[]) {
        tabledemo obj = new tabledemo();
    }
}

//*************************End***********************