oraclejdk

I installed Oracle JDK from the webupd8team/java PPA, and then installed the visualvm package. When starting visualvm , I get the following error message: [beni:~]$ visualvm No jdkhome found My $JAVA_HOME is set correctly to /usr/lib/jvm/java-7-oracle . Also, when starting visualvm with the jdkhome property set, I get the same error: [beni:~]$ visualvm --jdkhome $JAVA_HOME No jdkhome found Benedikt Köppel visualvm checks the following three directories for a JDK: /usr/lib/jvm/java-7-openjdk-$ARCH /usr/lib/jvm/java-8-openjdk-$ARCH and /usr/lib/jvm/default-java From the /usr/bin/visualvm start

Using java -version gives me this. java version "1.7.0_80" Java(TM) SE Runtime Environment (build 1.7.0_80-b15) Java HotSpot(TM) 64-Bit Server VM (build 24.80-b11, mixed mode) Is it an OpenJDK or OracleJDK ? I think that you're using OracleJDK. As I saw with a google search, the openJDK --version output is like this: java -version openjdk version "1.8.0-internal" OpenJDK Runtime Environment (build 1.8.0-internal-0) OpenJDK 64-Bit Zero VM (build 25.0-b20-internal, interpreted mode) See: http://mail.openjdk.java.net/pipermail/jdk8-dev/2013-July/002840.html On debian, jessie-backports, openjdk-8:

I have JDK 8u60 installed. I checked the Oracle website today and they have released two versions simultaneously: 8u65 and 8u66 . Both are public release versions. Why did they release two versions simultaneously? What conditions/reasons would make one choose one over the other? From the download page ( emphasis added): Java SE 8u65 includes important security fixes. Oracle strongly recommends that all Java SE 8 users upgrade to this release. Java SE 8u66 is a patch-set update, including all of 8u65 plus additional features (described in the release notes). Oracle often does this . It's all