$ projectlibre
Java auto-detection...
Checking /usr/java/latest/bin/java
Error
Checking java
Java version: NOK
Checking /usr/lib/jvm/jre/bin/java
Java version: NOK
Checking /usr/lib/jvm/jre-1.8.0/bin/java
Java version: NOK
Checking /usr/lib/jvm/jre-1.8.0-openjdk-1.8.0.144-1.b01.x86_64/bin/java
Java version: NOK
Checking /usr/lib/jvm/jre-openjdk/bin/java
Java version: NOK
Java not found or incorrect version.
Please install OpenJDK, Oracle JRE 1.6+ or set JAVA_HOME environment variable if it's already installed.