If Java is not recognized as internal or external command, you need to make sure that the installation is not problematic and its path is recognized as system variables.

Some developers try and change the Java compiler setting within Eclipse from Java 1.5 to Java 1.8, but that only works temporarily. As soon as a new Maven build takes place, the JDK version reverts ...

Oracle's newly released Java 7 runtime is relatively painless to install and uninstall.

To install Java 8 on a Ubuntu-based desktop distribution, log into the machine, open a terminal window, and issue the command: sudo apt install openjdk-8-jdk -y ...