If you are running an older version of Ubuntu such as Ubuntu 12.04 Some Java games refuse to work on the old versions of Java You can install OpenJDK 8 from a PPA repository Follow these steps to update OpenJDK: Open Terminal Ctrl+Alt+T Add PPA Type: Code: sudo add-apt-repository ppa:openjdk-r/ppa Press Enter Enter password Update Type: Code: sudo apt-get update Press Enter Install OpenJDK 8 Type: Code: sudo apt-get install openjdk-8-jdk Press Enter Set Default Java Type: Code: sudo update-alternatives --config java[code] Press Enter Note: Type in a number to select a Java version Set default compiler Type: [code]sudo update-alternatives --config javac Press Enter Verify installation Type: Code: java -version Press Enter Output should look like this: Code: openjdk version "1.8.0_01-internal" OpenJDK Runtime Environment (build 1.8.0_01-internal-b04) OpenJDK 64-Bit Server VM (build 25.40-b08, mixed mode)
