question about Java

[Joseph Sinclair]

Mike,
  You are running Java 11, which is the current Long Term Support version for Java, and preferred for most uses.

If you're running software that isn't horribly outdated and badly designed (and there is some of that) it will run on your install just fine.

If the ImageJ2 software is still talking about a transition from Java 6 (circa 2006!) to Java 8 (circa 2014), they're sufficiently far behind as to be dangerous.  There are known unpatched vulnerabilities in Java 8 that make it unacceptable for use in a desktop environment.  That's part of why all of the distributions have replaced it with Java 11 by default.

You could upgrade to Java 14 for the very latest VM improvements, but it's not a particularly big deal unless you're writing Java software or running Java in the server realm.

On 2020-05-04 11:24 AM, Michael via PLUG-discuss wrote:
> Thanks for the tip!
> So then looking at it it looks as if I have Java 11 installed. Is that correct?
> 
> apt search oracle jre
> ...
> i   openjdk-11-jre                                       - OpenJDK
> Java runtime, using Hotspot JIT
> p   openjdk-11-jre:i386                                  - OpenJDK
> Java runtime, using Hotspot JIT
> p   openjdk-11-jre-dcevm                                 - Alternative
> VM for OpenJDK 11 with enhanced class redefinition
> p   openjdk-11-jre-dcevm:i386                            - Alternative
> VM for OpenJDK 11 with enhanced class redefinition
> i   openjdk-11-jre-headless                              - OpenJDK
> Java runtime, using Hotspot JIT (headless)
> p   openjdk-11-jre-headless:i386                         - OpenJDK
> Java runtime, using Hotspot JIT (headless)
> p   openjdk-11-jre-zero                                  - Alternative
> JVM for OpenJDK, using Zero
> p   openjdk-11-jre-zero:i386                             - Alternative
> JVM for OpenJDK, using Zero
> p   openjdk-8-jre                                        - OpenJDK
> Java runtime, using Hotspot JIT
> p   openjdk-8-jre:i386                                   - OpenJDK
> Java runtime, using Hotspot JIT
> p   openjdk-8-jre-dcevm                                  - Alternative
> VM for OpenJDK 8 with enhanced class redefinition
> p   openjdk-8-jre-dcevm:i386                             - Alternative
> VM for OpenJDK 8 with enhanced class redefinition
> p   openjdk-8-jre-headless                               - OpenJDK
> Java runtime, using Hotspot JIT (headless)
> p   openjdk-8-jre-headless:i386                          - OpenJDK
> Java runtime, using Hotspot JIT (headless)
> p   openjdk-8-jre-zero                                   - Alternative
> JVM for OpenJDK, using Zero/Shark
> p   openjdk-8-jre-zero:i386                              - Alternative
> JVM for OpenJDK, using Zero/Shark
> p   spamoracle                                           - statistical
> analysis spam filter based on Bayes' formula
> p   spamoracle:i386                                      - statistical
> analysis spam filter based on Bayes' formula
> v   spamoracle-byte                                      -
> v   spamoracle-byte:i386                                 -
> 
> On Mon, May 4, 2020 at 2:12 PM Michael Butash <michael at butash.net> wrote:
>>
>> OpenJDK and Oracle JRE are two very different beasts.  Most java software is developed against Oracle Java, and if so, rarely I find they ever work on OpenJDK.
>>
>> Look up switching to "oracle jre" on your system, Java 8 as they want.  I had to figure this out on my arch system recently, ubuntu should just have to install it, and switch the system to use it, just forget how now.  If nothing else, start with "apt search oracle jre".
>>
>> Nothing Java ever amounts to any good I've found after ~20 years of it, I try to use Java as little as possible, scorning any software and hardware (ahem, Cisco) that uses it still.  Anything Java behaves badly under linux for me, and the only thing java app I suffer is JBidwatcher for ebay sniping deals.  It behaves badly, randomly, but still the only darn thing I can find like it free.
>>
>> -mb
>>
>>
>> On Mon, May 4, 2020 at 9:50 AM Michael via PLUG-discuss <plug-discuss at lists.phxlinux.org> wrote:
>>>
>>> I want to download a program, ImageJ. I went to the download page and see:
>>>
>>> Unfortunately, due to the ongoing transition from Java 6 to Java 8,
>>> this download of "plain ImageJ2" cannot currently be updated to the
>>> latest Java-8-compatible version. See the Java 8 page for details. For
>>> the time being, we recommend using the Fiji distribution of ImageJ to
>>> stay current with updates.
>>>
>>> Curious as to what version of Java I have....
>>>
>>> ~$ java -version
>>> openjdk version "11.0.7" 2020-04-14
>>> OpenJDK Runtime Environment (build 11.0.7+10-post-Ubuntu-2ubuntu218.04)
>>> OpenJDK 64-Bit Server VM (build 11.0.7+10-post-Ubuntu-2ubuntu218.04,
>>> mixed mode, sharing)
>>>
>>> So they are a bit behind?
>>> --
>>> :-)~MIKE~(-:
>>> ---------------------------------------------------
>>> PLUG-discuss mailing list - PLUG-discuss at lists.phxlinux.org
>>> To subscribe, unsubscribe, or to change your mail settings:
>>> https://lists.phxlinux.org/mailman/listinfo/plug-discuss
> 
> 
> 

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