Error message when compiling

Hello
I am totally new to Java, but very fascinated. My first attempts however have failed and I do not know why:
When compiling like:
javac SystemInfo.java
I get following Error Message:
Exception in thread "main" java.lang.NoClassDefFoundError: com/sun/tools/javac/Main
My OS is Windows XP and I am pretty sure that I have set the path-variable correct (just followed the instructions of the book and had no problems).
Could anyone help me with this problem, please?
Thanks a lot
mazarata

Thanks a lot. The info, I have found about the error message is:
If you see the error message "java.lang.NoClassDefFoundError: com/sun/tools/javac/Main" when you distribute an application, the JAVA_HOME variable is pointing to a J2SE JRE directory, not a J2SE SDK directory, as it should be. This module requires the JAVA_HOME variable to point to a J2SE SDK directory to resolve all library JAR file references.
Well, I guess I folllow your advice and re-install Java, as I have not distributed any application.
Thanks for your help
mazarata

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