You can set the PATH, remembering to start with the root (on Windows® usually C:....) and end with bin in the PATH component. Don't set a CLASSPATH. You can simplify updating your PATH with a JAVA_HOME variable, but it's not absolutely essential. You will find about setting the PATH
in our FAQ and it is worth having a look at the
common problems tutorial. If you have the installation instructions page to hand, look at §4.
And I have moved your discussion because it appears to be a new question.