Could not find main class HelloWorld

Question

I installed Java 1.7.0 in the following folder C:\\Program Files\\Java. My operating system is Windows XP(Version 2002) with Service pack 3.

The envir

Answer 1

Tell it where to look for you class: it's in ".", which is the current directory:

java -classpath . HelloWorld

No need to set JAVA_HOME or CLASSPATH in this case