Top "Openjdk" questions

Resolving version conflict between java and javac on Ubuntu

I have a problem with my compiled Java application on Ubuntu. It throws UnsupportedClassVersionError. I am compiling with a higher …

ubuntu java javac openjdk unsupported-class-version

Java: How do I override a method of a class dynamically (class is eventually NOT in classpath)?

How do I call a method of a class dynamically + conditionally? (Class is eventually not in classpath) Let's say, I …

java reflection classpath openjdk nimbus

openjdk 1.8 package for centos 6.5

I want to move our production setup to openjdk 1.8 soon. Currently we're running openjdk 1.7u55 on centos 6.5. The trouble is …

java centos6 openjdk

How to know if I am using Open JDK or Oracle JDK?

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 …

java openjdk jdk1.7 oraclejdk

Installing jvisualvm on CentOS

I installed Java on my CentOS machine, but I don't have jvisualvm: [root@ bin]# ls -la /usr/lib/jvm/jre-1.6.0…

centos java openjdk jvisualvm

How can I tell whether Java is Sun / Oracle / OpenJDK?

Possible Duplicate: Which JRE I am using I'm trying to figure out whether the Java installation in my HPC environment …

java oracle openjdk sun

How can I start coding with Oracle's Nashorn JS Engine and when will it replace Rhino in the OpenJDK?

I'm looking for a way to start playing around with Oracle's new Nashorn JavaScript Engine. I've DL'd the latest OpenJDK 8 (…

java rhino openjdk nashorn

OpenJDK vs Java HotspotVM

Are OpenJDK VM and Oracle Hotspot VM still two different JVMs? I can't seem to find any somewhat official documentation …

java jvm openjdk jvm-hotspot hotspot

Java error: "Comparison method violates its general contract!"

I have this code: package org.optimization.geneticAlgorithm; import org.optimization.geneticAlgorithm.selection.Pair; public abstract class Chromosome implements Comparable&…

java openjdk comparable

Heap dump error on Centos 64bit and openjdk 7

I'm trying to generate a heap dump on my machine that is running a glassfish 3.1.2 using a open-jdk7 java. I'm …

java openjdk heap-dump