Install Java

There are two versions of Java, both with a JRE (if you just want to run java programs) and JDK (if you wish to develop java programs). Sadly, sometimes you need the JDK, even if you just want to run JAVA programs.

• OpenJDK - JRE

java -version
apt-get install default-jre
java --version

• OpenJDK - JDK

javac -version
apt-get install default-jdk
javac --version

• Oracle's JRE

Oracle's Java JRE

• Oracle's JDK

Oracle's Java JDK