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

I had the same problem. Perhaps, the problem is that you have compiled and executed the class with different Java versions.

Make sure the version of the compiler is the same as the command "java":

javac -version

java -version

In Linux, use

sudo update-alternatives --config java

to change the version of Java.