Issues with derby Database using a GUI - user-interface

Question

I am asking this question because I was unable to find a similar question. I recently completed this college project where I made a console application that connected to the database and everything seemed perfectly fine. The method I used to connect to the database is this:
private static Connection getConnection()
{
Connection connection = null;
try
{
String dbDirectory = "c:/murach/java/db";
System.setProperty("derby.system.home", dbDirectory);
String dbURL = "jdbc:derby:MurachDB2";
String username = "";
String password = "";
connection = DriverManager.getConnection(dbURL, username, password);
System.out.println("connect works");
return connection;
} //end try connection statement
catch (SQLException e)
{
for (Throwable t : e)
{
e.printStackTrace();
System.out.println("something went wrong on connection method");
} //end for loop for errors
} // end catch statement for connection error
return connection;
}
As I said before I created the console application and everything seemed fine and I turned it in. However, I wanted to experiment with something, I wanted to make another version of this application but instead a GUI application using Jform. I used all of the same classes as before, except that instead of a main class, I used a jform. The method and class is exactly the same, because the database didn't change locations in my folder, however when I run it in the Jform application I get a runtime error.
What it was a null point error and I knew it had something to do with connecting to the database because I wrote a System.out.Println in the catch SQL Exception to notify that something went wrong with the method. The connect to the database is fine with the console application, but my question is if there is any further measures I need to take when it comes to working with a JFrame application. Is there anything I am missing or is there any extra step I need to do. For further measures I will display the whole class that works with the database, and I will also use the event handlers in the Jframe.
I want to make this clear in which that I am not required to do this. I am just playing around with Java, and I could easily leave this alone without consequences, but I feel I really want to learn this so this is why I am asking for help. Any kind of advice or if any of you can let you know what I am missing I would really appreciate it.
Edit
adding error information
>java.sql.SQLException: No suitable driver found for jdbc:derby:MurachDB2
something went wrong on connection method
java.lang.NullPointerException
something went from with dislay part
at java.sql.DriverManager.getConnection(DriverManager.java:689)
at java.sql.DriverManager.getConnection(DriverManager.java:247)
at CustomerInvoiceDB.getConnection(CustomerInvoiceDB.java:38)
at CustomerInvoiceDB.getCustomers(CustomerInvoiceDB.java:67)
at CutomerInvoice.displayButtonActionPerformed(CutomerInvoice.java:111)
at CutomerInvoice.access$000(CutomerInvoice.java:24)
at CutomerInvoice$1.actionPerformed(CutomerInvoice.java:57)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2348)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:252)
at java.awt.Component.processMouseEvent(Component.java:6533)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3324)
at java.awt.Component.processEvent(Component.java:6298)
at java.awt.Container.processEvent(Container.java:2236)
at java.awt.Component.dispatchEventImpl(Component.java:4889)
at java.awt.Container.dispatchEventImpl(Container.java:2294)
at java.awt.Component.dispatchEvent(Component.java:4711)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4888)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4525)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4466)
at java.awt.Container.dispatchEventImpl(Container.java:2280)
at java.awt.Window.dispatchEventImpl(Window.java:2746)
at java.awt.Component.dispatchEvent(Component.java:4711)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758)
at java.awt.EventQueue.access$500(EventQueue.java:97)
at java.awt.EventQueue$3.run(EventQueue.java:709)
at java.awt.EventQueue$3.run(EventQueue.java:703)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:86)
at java.awt.EventQueue$4.run(EventQueue.java:731)
at java.awt.EventQueue$4.run(EventQueue.java:729)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:728)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)