There are various instances of this issue that we get such as JAVAC’, JRE, ‘MVN’, JAR’ is not recognized as an internal or external command, operable program or batch file, ‘Java’ is ...

I've put the jar files in a new folder, added that folder to the PATH and CLASSPATH, and added that to the build path as an external library. I've added a user defined library in Eclipse ...

Newer versions of Java now require all JAR files to be signed with a valid code-signing key, and starting with Java 7 Update 51, unsigned or self-signed applications are blocked from running.