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how can I remove java 1.8 from my ubuntu 14.04

Tried Trinity for de novo assembly, but it requires java 1.7:

kurban@kurban-X550VC:~/Desktop/Trinity$ ~/Downloads/trinityrnaseq-2.0.6/Trinity --seqType fq --left R1.fq --right R2.fq --CPU 3 --max_memory 3G
Error, Trinity requires access to Java version 1.7.  Currently installed version is: java version "1.8.0_40"
Java(TM) SE Runtime Environment (build 1.8.0_40-b25)
Java HotSpot(TM) 64-Bit Server VM (build 25.40-b25, mixed mode)
kurban@kurban-X550VC:~/Desktop/Trinity$ rpm -qa jdk
kurban@kurban-X550VC:~/Desktop/Trinity$ sudo rpm -qa jdk
kurban@kurban-X550VC:~/Desktop/Trinity$

And I tried to remove my current version java fro several hours, now its almost dawn here, but I still could not remove it.

Have anybody encountered it before. Please give me some suggestions!

software-error
• 6,956 views • link
updated by Ram Ram • written by Kurban Kurban

Have you ever installed openjdk-8-jre?

• 0 views • link
updated by Ram Ram • written by wpwupingwp wpwupingwp

Hey @wpwupingwp,

I do not know, does this not the version?

kurban@kurban-X550VC:~$ sudo java -version
java version "1.8.0_40"
Java(TM) SE Runtime Environment (build 1.8.0_40-b25)
Java HotSpot(TM) 64-Bit Server VM (build 25.40-b25, mixed mode)
• 0 views • link
updated by Ram Ram • written by Kurban Kurban

If you are using Ubuntu you would use apt-get instead of rpm. Can you double check what OS you are running? Also you can easily install multiple versions of java on the same machine. You would just set the PATH to specify which java binary directory you want to refer to.

• 0 views • link
written by cmdcolin cmdcolin

Hey @cmdcolin,

My OS is ubuntu 14.04LTS, and I tried apt-get:

kurban@kurban-X550VC:~$ sudo java -version
java version "1.8.0_40"
Java(TM) SE Runtime Environment (build 1.8.0_40-b25)
Java HotSpot(TM) 64-Bit Server VM (build 25.40-b25, mixed mode)

kurban@kurban-X550VC:~$ sudo apt-get remove java
[sudo] password for kurban: 
Reading package lists... Done
Building dependency tree       
Reading state information... Done
E: Unable to locate package java
• 0 views • link
updated by Ram Ram • written by Kurban Kurban

Try running sudo update-alternatives --config java and see java 1.7 shows up. If it does, select it, and then your system java will now be 1.7. If it is not in the list, install it with sudo apt-get install openjdk-7-jre and then re-run the update-alternatives command.

• 0 views • link
updated by Ram Ram • written by cmdcolin cmdcolin

Thanks @cmdcolin,

There is a video about it on youtube, which helped me delete all the java version on my PC. And I used sudo apt-get install openjdk-7-jre installed the version. Now the tool works find.

• 0 views • link
updated by Ram Ram • written by Kurban Kurban

Hello Kurban!

We believe that this post does not fit the main topic of this site.

The question is not related to bioinformatics, it's just sysadmin.

For this reason we have closed your question. This allows us to keep the site focused on the topics that the community can help with.

If you disagree please tell us why in a reply below, we'll be happy to talk about it.

Cheers!

• 0 views • link
updated by Ram Ram • written by Pierre Lindenbaum Pierre Lindenbaum

That is okay @Pierre.

Since most of the time I can find answers in biostars to problems I should thank you guys.

Sincerely.

• 0 views • link
updated by Ram Ram • written by Kurban Kurban

1 answer

See this, it may help you, in the chapter Choosing the default Java to use

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updated by Ram Ram • written by wpwupingwp wpwupingwp

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