Java & Javax.swing

Noob question i'm afraid.. I'm attempting to learn Java and have installed JAVA from the Professional 9.1 disks. The tutorial prog I have been trying to use requires javax.swing, but after no errors at  compile time i get a whole heap of errors when I run the program. I have no problem runnning Java code that just dumps text to screen. All of these errors are regarding javax.swing Where am I going wrong. All help, comments ( and flaming :) gratefully accepted Karl Wheeler