Maven Learn the basics of Maven and how to solve to common errors. Installation Maven on Eclipse IDE JAR Add a custom local JAR as a dependency Common errors No compiler is provided in this environment. Perhaps you are running on a JRE rather than a JDK? Fatal error compiling: invalid target release: <JDK_VERSION> java.lang.OutOfMemoryError: PermGen space Unsupported IClasspathEntry kind=4? No main manifest attribute, in “<APP_NAME>.jar”