How to show the Oracle table list in a JTable?

Question

So I am trying to build a CRUD app, I am able to perform all the operations in a console app and now I want to use the same methods in my GUI application. I have setup all the necessary fields and a table, the add button works and I can implement the others too! my question is how to work with the JTable?

Here is the code for my window builder. You can see that I have set columns for the tables too.

this is what the GUI looks like

package clientGUI;

import java.awt.EventQueue;

import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JTextField;
import javax.swing.JButton;
import javax.swing.JTable;
import javax.swing.JScrollPane;
import javax.swing.table.DefaultTableModel;

import bus.Student;
import data.ConnectionDB;

import java.awt.event.ActionListener;
import java.sql.Connection;
import java.sql.SQLException;
import java.util.ArrayList;
import java.awt.event.ActionEvent;
 import java.awt.Font;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData; 
import java.sql.SQLException;
import java.sql.Statement;
public class DbTester1 {

private JFrame frame;
private JTextField textID;
private JTextField textFN;
private JTextField txtLN;
private JTable table;
private JTable table_1;
ArrayList<Student> studentList= null;
String query = "" ;
Statement stmt = null;     
ResultSet rs = null;
Student aStudent = null;    

public static void main(String[] args) {
    EventQueue.invokeLater(new Runnable() {
        public void run() {
                DbTester1 window = new DbTester1();
                window.frame.setVisible(true);
        }
    });
}
public DbTester1() {
    initialize();   
}
private void initialize() {
    frame = new JFrame();
    frame.setBounds(100, 100, 732, 695);
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.getContentPane().setLayout(null);
    
    JLabel lblID = new JLabel("ID");
    lblID.setBounds(10, 11, 46, 14);
    frame.getContentPane().add(lblID);
    
    JLabel lblFN = new JLabel("FN");
    lblFN.setBounds(11, 42, 57, 14);
    frame.getContentPane().add(lblFN);
    
    JLabel lblLN = new JLabel("LN");
    lblLN.setBounds(10, 79, 46, 14);
    frame.getContentPane().add(lblLN);
    
    textID = new JTextField();
    textID.setBounds(78, 8, 86, 20);
    frame.getContentPane().add(textID);
    textID.setColumns(10);
    
    textFN = new JTextField();
    textFN.setBounds(78, 39, 86, 20);
    frame.getContentPane().add(textFN);
    textFN.setColumns(10);
    
    txtLN = new JTextField();
    txtLN.setBounds(78, 76, 86, 20);
    frame.getContentPane().add(txtLN);
    txtLN.setColumns(10);
    
    ArrayList<Student> studList = new ArrayList<Student>();

    JButton btnAdd = new JButton("Add");
    btnAdd.setFont(new Font("Tahoma", Font.PLAIN, 8));
    btnAdd.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent e) {
        Student aStudent = new Student(Integer.parseInt(textID.getText()) , 
textFN.getText(), txtLN.getText());
        
        studList.add(aStudent);
        }
    });
    btnAdd.setBounds(0, 103, 89, 23);
    frame.getContentPane().add(btnAdd);
    
    JScrollPane scrollPane = new JScrollPane();
    scrollPane.setBounds(174, 11, 250, 292);
    frame.getContentPane().add(scrollPane);
    
    table = new JTable();
    table.setModel(new DefaultTableModel(
        new Object[][] {
        },
        new String[] {
            "ID", "FN", "LN"
        }
    ));
    scrollPane.setViewportView(table);
    
    table_1 = new JTable();
    scrollPane.setColumnHeaderView(table_1);
    
    JButton btnConnect = new JButton("Connect");
    btnConnect.setFont(new Font("Tahoma", Font.PLAIN, 8));
    btnConnect.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent e) {
            Connection con = null;
            try {
                con = ConnectionDB.getConnection();
                JOptionPane.showMessageDialog(null, "Connection 
Established!");
            } catch (SQLException e1) {
                // TODO Auto-generated catch block
                e1.printStackTrace();
                JOptionPane.showMessageDialog(null, "Connection failed!");
            }   
        }
    });
    btnConnect.setBounds(0, 128, 89, 23);
    frame.getContentPane().add(btnConnect);
    
    JButton btnSearch = new JButton("Search");
    btnSearch.setFont(new Font("Tahoma", Font.PLAIN, 8));
    btnSearch.setBounds(0, 153, 89, 23);
    frame.getContentPane().add(btnSearch);
    
    JButton btnUpdate = new JButton("Update");
    btnUpdate.setFont(new Font("Tahoma", Font.PLAIN, 8));
    btnUpdate.setBounds(0, 178, 89, 23);
    frame.getContentPane().add(btnUpdate);
    
    JButton btnRefresh = new JButton("Refresh");
    btnRefresh.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent e) {
            Connection con = null;
            try {
                con = ConnectionDB.getConnection();
                String id, fn, ln;
                query = "select * from student";       
                stmt = con.createStatement();
                rs = stmt.executeQuery(query);

                studentList = new ArrayList<Student> ();
                
                 while(rs.next())
                   {
                       id = rs.getString(1);
                       fn = rs.getString(2);
                       ln = rs.getString(3);    
                       aStudent = new Student(Integer.parseInt(id) , fn, ln);
                       studentList.add(aStudent);   
                    }
            } catch (SQLException e1) {
                // TODO Auto-generated catch block
                e1.printStackTrace();
                JOptionPane.showMessageDialog(null, "Connection read 
    data!!!!!");
            }
        }
    });
    btnRefresh.setFont(new Font("Tahoma", Font.PLAIN, 8));
    btnRefresh.setBounds(0, 205, 89, 23);
    frame.getContentPane().add(btnRefresh);
        }
    }