Java Swing Libraries for Mac OS 8.x/9.x

Full installer [primarily for developers]:
Creates a Swing folder with swingall.jar and several examples with source code
IMPORTANT: This installer is supplied by Sun and does not place swingall.jar in the proper location.
After running the installer you must move swingall.jar from the Swing folder into
System Folder/Extensions/MRJ Libraries/MRJClasses
per below.
You do not need to restart your Mac to make it work, though.
swing111-install 2.sit [10.8 MB]


swingall.jar - File only [much smaller and all that is required]:
Download and move into System Folder/Extensions/MRJ Libraries/MRJClasses
per below.
swingall.jar [2.3 MB]

[Instructions are below this image - scroll down to see them]
Where to put swingall.jar

REGARDLESS of which link you choose, you MUST perform the following:

1.   Open the System Folder
2.   Open the Extensions folder
3.   Open the MRJ Libraries folder
4.   Open the MRJClasses folder
5.   Drag swingall.jar into the MRJClasses folder

If you receive an "Unable to launch Java application" error when you launch SpamX for the first time and clicking the details button shows: 
java.lang.NoClassDefFoundError: javax/swing/JFrame
	at com.zerog.lax.LAX.launch(Compiled Code)
	at com.zerog.lax.LAX.main(Unknown Source)
	at com.apple.mrj.JManager.JMStaticMethodDispatcher.run(JMAWTContextImpl.java)
	at java.lang.Thread.run(Thread.java)
then you have not followed these instructions and swingall.jar is not in the proper place.