I\'m new to the world of java and have been following a few online tutorials to get started. Everything was going great and the programs were compiling perfectly and then al
I too have had this problem. Try restarting Eclipse. If that doesn't work, restart your computer. If even that doesn't work, re-install Java. Its an annoying bug that usually occurs when your computer goes into standby while a program is running on Eclipse.
EDIT: If the problem persists, you can make a small javac program that would compile any code in a given directory.
Hope I helped!