Installation of a jar File in the ext Folder

For this approach you must start with a properly created JAR file containing all the classes in the package. 

• Search your computer for the location of a folder called ext. For instance, on my computer this folder is contained within the folder in which I installed the JDK -- c:\jdk1.2\jre\lib\ext (this will vary depending on the version of the JDK being used). 
  • WARNING: The location and version of your jdk may be different.
• Copy MyPackage.jar to this folder
  • WARNING: With JDK1.3 and later, also copy the jar file to the folder C:\Program Files\JavaSoft\JRE\1.3.1\lib\ext or whatever it happens to be called on your computer
• If this doesn't work, try Method 2.

Notes:

• If you are working on  a Unix machine, replace the backslashes with forward slashes.
• If you have installed and use more than one Java development environment on your computer, there may be several such folders. Copy MyPackage.jar into each.