Java Project Error after changing database from MySQL to SQLite

i am learning java i have created simple (CRUD) java program utilizing mysql,its works fine

java.lang.ClassNotFoundException: org.sqlite.JDBCException in thread "AWT-EventQueue-0" java.lang.NullPointerException
at tes.MainForm.Tampil(MainForm.java:46)
at tes.MainForm.<init>(MainForm.java:85)
at tes.MainForm$4.run(MainForm.java:329)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:251)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:733)
at java.awt.EventQueue.access$200(EventQueue.java:103)
at java.awt.EventQueue$3.run(EventQueue.java:694)
at java.awt.EventQueue$3.run(EventQueue.java:692)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:703)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)`

My DBConnection class

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
public class DBConnection {   
Connection c = null;
Statement script;

public DBConnection(){
    try{
        Class.forName("org.sqlite.JDBC");
 //  Class.forName("com.mysql.jdbc.Driver");
   // c = DriverManager.getConnection("jdbc:ucanaccess://c:/asa.accdb");
 c = DriverManager.getConnection("jdbc:sqlite:C:/titit2.db");
   // c = DriverManager.getConnection("jdbc:mysql://localhost:3306/titit","root","root");
    script = c.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_UPDATABLE);
    System.out.println("Koneksi Sukses");
    }catch(  SQLException | ClassNotFoundException ex){
    System.err.print(ex);
    }
}
}

Inside my mainform class (line 23-46)

    private void Tampil(){
    try{
        int row = tabel.getRowCount();
        for(int i=0;i<row;i++){
            tabeldata.delete(0, row);
        }
        String sql;
        sql = "SELECT * from asu";
            ResultSet rs = c.script.executeQuery(sql);

        while(rs.next()){
            DataPegawai d = new DataPegawai();
            d.setNo(rs.getInt("no"));
            d.setNip(rs.getInt("nip"));
            d.setNama(rs.getString("nama"));
            d.setDivisi(rs.getString("divisi"));
            d.setLevel(rs.getInt("level"));
            tabeldata.add(d);
        }
    }catch(SQLException e){
        System.err.print(e);
    }
}