I have finished the prototype of the tables

my next goal is file input and output

How to add scroll bar to your JScrollPane

import javax.swing.*;
import javax.swing.table.DefaultTableModel;

/**
 *
 * @author Lee
 */

public class MyTableFrame extends JPanel {
    
    
    
    public MyTableFrame() {
        Object[][] data = {
            {null, null, null, null, null, null, null, null, null, null, null, null, null, null, null},
            {null, null, null, null, null, null, null, null, null, null, null, null, null, null, null},
            {null, null, null, null, null, null, null, null, null, null, null, null, null, null, null},
            {null, null, null, null, null, null, null, null, null, null, null, null, null, null, null},
            {null, null, null, null, null, null, null, null, null, null, null, null, null, null, null},
            {null, null, null, null, null, null, null, null, null, null, null, null, null, null, null},
            {null, null, null, null, null, null, null, null, null, null, null, null, null, null, null},
            {null, null, null, null, null, null, null, null, null, null, null, null, null, null, null},
            {null, null, null, null, null, null, null, null, null, null, null, null, null, null, null},
            {null, null, null, null, null, null, null, null, null, null, null, null, null, null, null},
            {null, null, null, null, null, null, null, null, null, null, null, null, null, null, null},
            {null, null, null, null, null, null, null, null, null, null, null, null, null, null, null},
            {null, null, null, null, null, null, null, null, null, null, null, null, null, null, null},
        };

        String[] columnNames = new String[data[0].length];
        for(int i=0; i<data[0].length; i++) {
            columnNames[i] = "column: " + i;
        }
            
        DefaultTableModel myModel = new DefaultTableModel(data, columnNames);
        JTable myTable = new JTable(myModel);
        
        // Here, we add vertial scroll bar and horizontal scroll bar
        // VERTICAL_SCROLLBAR_ALWAYS could be VERTIAL_SCROLLBAR_AS_NEEDED 
        // same for horizontal bar
        JScrollPane myScrollPane = new JScrollPane(
                JScrollPane.VERTICAL_SCROLLBAR_ALWAYS,
                JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);
        myTable.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
        myScrollPane.getViewport().add(myTable);
        
        this.add(myScrollPane);
    }
    
    private static void createAndShowGUI() {
        //Create and set up the window.
        JFrame frame = new JFrame("SimpleTableDemo");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 
        //Create and set up the content pane.
        MyTableFrame newContentPane = new MyTableFrame();
        newContentPane.setOpaque(true); //content panes must be opaque
        frame.setContentPane(newContentPane);
 
        //Display the window.
        frame.pack();
        frame.setVisible(true);
    }
 
    public static void main(String[] args) {
        //Schedule a job for the event-dispatching thread:
        //creating and showing this application's GUI.
        javax.swing.SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                createAndShowGUI();
            }
        });
    }
    
};