Java 8 Eclapse connect to Microsoft Access, "ClassNotFoundException: net.ucanaccess.jdbc.UcanaccessDriver"

[Enshuo Hsu]

Hello,
I just downloaded ucanaccess. I'm facing a problem with the connection to Access 2007.
I use Java 8, Eclipse, and I have followed the instruction on this webpage:
http://stackoverflow.com/questions/21955256/manipulating-an-access-database-from-java-without-odbc?lq=1
What I've done is:
1, Downloaded ucanaccess with 5 .jar files
UCanAccess (ucanaccess-2.x.x.jar)
HSQLDB (hsqldb.jar, version 2.2.5 or newer)
Jackcess (jackcess-2.x.x.jar)
commons-lang (commons-lang-2.4.jar, or newer)
commons-logging (commons-logging-1.0.4.jar, or newer)
2, Put the .jar files above into my project's folder and added into library(Eclipse->window->Java->User Libraries->Add External JARs).
3, Import java.sql.*;

My code is:

public static void main(String[] args){
    try {
        Class.forName("net.ucanaccess.jdbc.UcanaccessDriver");
        Connection conn=DriverManager.getConnection("jdbc:ucanaccess://C:/Users/David/workspace/0724/test/test.accdb");         
    System.out.println("OK");
    } catch (SQLException | ClassNotFoundException e) {
    System.out.println("fail");
        e.printStackTrace();
    }

}

But it returns an exception:

java.lang.ClassNotFoundException: net.ucanaccess.jdbc.UcanaccessDriver
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at WebRequest.main(WebRequest.java:11)

It seems that the class of the driver is not found. But it is supposed to be in the 5 .jars I downloaded...
I've been working on this for a long time. Please help me with this. Any of your suggestions are appreciated.

[Enshuo Hsu]

I just found the problem!!
I did not successfully put the .jars in my referenced library... How stupid I am!
Now it works~~

[Marco Amadei]

Nothing stupid.