Java Code

Absolute positioning
App.java
Authenticating against Active Directory
http://www.programming-free.com/2012/09/query-active-directory-from-java-using.html
Awt stuff
Charts and Graphs
Command line arguments
Connecting to Mysql
Creating a servlet called CompletedBy ( the web.xml addition required )
Custom Painting Oracle docs Executing a program
Gits Source files.
Getting user input
Graph plotting with JFreeChart
GUI Frame
Obtaining servlet GET parameters
Query Mysql
Query Mysql 2
Query SQL Server
Query ad Oracle link  : http://docs.oracle.com/javase/jndi/tutorial/getStarted/examples/directory.html Reading a text file line by line.
Writing to a file with Java

Exit a program
String length (java)

Servlet redirect
Password protecting pages
Removing white space and apostrophe from string
Graphics
For loop ( java )
Sleep ( java )
Amimating a line
repaint()
Images in Java
Oracle documentation and tutorials
Query Active Directory (ldaptest)
Installing an SSL certificate into keystore
Reading from a file in java
Thread stuff
Images in java servlets
Java talking to Active Directory
Drawing Graph project
Take the first X characters from a string
TextArea
The toString() method in java
Using Split