ii  openjdk-7-jdk:amd64          7u79-2.5.5-1~deb8u1 amd64        OpenJDK Development Kit (JDK)
ii  openjdk-7-jre:amd64          7u79-2.5.5-1~deb8u1 amd64        OpenJDK Java runtime, using Hotspot JIT
ii  openjdk-7-jre-headless:amd64 7u79-2.5.5-1~deb8u1 amd64        OpenJDK Java runtime, using Hotspot JIT (headless)