How to install JDK on Ubuntu

In this example, we will show you how to install JDK 7 on Ubuntu 12.

1. Find Openjdk

Ubuntu is using OpenJDK, in terminal, issue this command apt-cache search openjdk to get all the available Openjdk version.


$ apt-cache search openjdk
default-jdk - Standard Java or Java compatible Development Kit
default-jdk-doc - Standard Java or Java compatible Development Kit (documentation)
default-jre - Standard Java or Java compatible Runtime
default-jre-headless - Standard Java or Java compatible Runtime (headless)
icedtea-7-jre-jamvm - Alternative JVM for OpenJDK, using JamVM
icedtea-7-plugin - web browser plugin based on OpenJDK and IcedTea to execute Java applets
openjdk-7-dbg - Java runtime based on OpenJDK (debugging symbols)
openjdk-7-demo - Java runtime based on OpenJDK (demos and examples)
openjdk-7-doc - OpenJDK Development Kit (JDK) documentation
openjdk-7-jdk - OpenJDK Development Kit (JDK)
openjdk-7-jre - OpenJDK Java runtime, using Hotspot JIT
openjdk-7-jre-headless - OpenJDK Java runtime, using Hotspot JIT (headless)
openjdk-7-jre-lib - OpenJDK Java runtime (architecture independent libraries)
openjdk-7-source - OpenJDK Development Kit (JDK) source files
java-package - Utility for creating Java Debian packages

2. Install Openjdk

To install, type this – apt-get install openjdk-7-jdk.


$sudo apt-get install openjdk-7-jdk

3. Verification

Ubuntu installed the JDK in this folder – /usr/lib/jvm/jdk-folder, for example /usr/lib/jvm/java-7-openjdk-amd64/. In additional, Ubuntu also puts the JDK bin folder in the system path, via symbolic link. For example, /usr/bin/java.

To verify if JDK is installed properly, type java -version.


$java-version
java version "1.7.0_09"
OpenJDK Runtime Environment (IcedTea7 2.3.3) (7u9-2.3.3-0ubuntu1~12.10.1)
OpenJDK 64-Bit Server VM (build 23.2-b09, mixed mode)

4. Post-Installation, JAVA_HOME

This step is optional, but recommended. To configure the JAVA_HOME in system path each time the terminal is started, just append the export JAVA_HOME to the end of /etc/profile or .bashrc.

For example.

Bash Terminal

$ echo $JAVA_HOME
//show nothing

$sudo echo export JAVA_HOME="/usr/lib/jvm/java-7-openjdk-amd64/" >> ~/.bashrc

//restart terminal or use "source"
$ source ~/.bashrc 

$ echo $JAVA_HOME
/usr/lib/jvm/java-7-openjdk-amd64/

Done.

About the Author

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mkyong
Founder of Mkyong.com, love Java and open source stuff. Follow him on Twitter, or befriend him on Facebook or Google Plus. If you like my tutorials, consider make a donation to these charities.

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bhavesh
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bhavesh

its really a helpful post

Yashaswi
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Yashaswi

for those who are looking to install SUN/Oracle jdk chk this –>> http://www.wikihow.com/Install-Oracle-Java-JDK-on-Ubuntu-Linux

sachin Dua
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sachin Dua

Sir
sachin@sachin-Lenovo-G550:~$ java -version
java version “1.7.0_21”
OpenJDK Runtime Environment (IcedTea 2.3.9) (7u21-2.3.9-1ubuntu1)
OpenJDK Server VM (build 23.7-b01, mixed mode)

when I apply this command this showe that java is installed in my system,but when I am going to compile any java program it gives the following error

sachin@sachin-Lenovo-G550:~/programs$ javac abc.java
The program ‘javac’ can be found in the following packages:
* default-jdk
* ecj
* gcj-4.6-jdk
* gcj-4.7-jdk
* openjdk-7-jdk
* openjdk-6-jdk
Try: sudo apt-get install

please tell me how to get rid of it & run my java program

mkyong
Guest
mkyong

Weird… Ubuntu should copy the Java/bin folder to your system path automatically. Nvm, just put the JAVA/bin folder to your environment.

export PATH=$PATH:$JAVA_HOME/bin

blackbird014
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blackbird014

always interesting. Thanx for posting
a little remark.
you can correct
opt-cache search openjdk
with
apt-cache search openjdk

I even copied and pasted half asleep haha

mkyong
Guest
mkyong

Thanks for the typo, article is updated.

Kazuko
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Kazuko

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Prakhar
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Prakhar

You probably forgot to close tag after "JAVA_HOME" in your blog. It has messed up the formatting below line "in system path each time the terminal is started,"...

Prakhar
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Prakhar

oops..! it picked up tag and screwed my comment's formatting also.

mkyong
Guest
mkyong

Thanks, fixed.

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[…] apt????(??) […]

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kava
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kava
Hi , While installing i am getting this error ..pls look at this give me suggestions..how to resolve.., Err http://in.archive.ubuntu.com/ubuntu/ precise-updates/universe openjdk-7-jre-lib all 7~u3-2.1.1~pre1-1ubuntu3 Something wicked happened resolving ‘in.archive.ubuntu.com:http’ (-5 – No address associated with hostname) Err http://in.archive.ubuntu.com/ubuntu/ precise/main ca-certificates-java all 20110912ubuntu6 Something wicked happened resolving ‘in.archive.ubuntu.com:http’ (-5 – No address associated with hostname) Err http://in.archive.ubuntu.com/ubuntu/ precise/main tzdata-java all 2012b-1 Something wicked happened resolving ‘in.archive.ubuntu.com:http’ (-5 – No address associated with hostname) Get:1 http://in.archive.ubuntu.com/ubuntu/ precise-updates/universe openjdk-7-jre-headless i386 7~u3-2.1.1~pre1-1ubuntu3 [30.2 MB] Get:2 http://in.archive.ubuntu.com/ubuntu/ precise/main libbonobo2-common all 2.32.1-0ubuntu1 [56.7 kB] Get:3 http://in.archive.ubuntu.com/ubuntu/ precise/main libbonobo2-0 i386 2.32.1-0ubuntu1 [222 kB] Get:4 http://in.archive.ubuntu.com/ubuntu/ precise/main libgnomevfs2-common… Read more »
sanjay
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sanjay

hiiiiiiiiiii i won’t get correct result of how to open ecllipse in linux(ubuntu)

Weimin Ma
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Weimin Ma
Hi, I am trying install sun-java6-jdk but I got the following errors. It used to work for me before. So it seems that it has been removed from partners. Does anyone else see this? Can someone tell me how to download it from oracle? sudo apt-get install sun-java6-jdk Reading package lists… Done Building dependency tree Reading state information… Done The following extra packages will be installed: gsfonts-x11 java-common odbcinst odbcinst1debian1 sun-java6-bin sun-java6-jre unixodbc Suggested packages: default-jre equivs sun-java6-demo default-jdk-doc sun-java6-source sun-java6-plugin ia32-sun-java6-plugin sun-java6-fonts ttf-kochi-gothic ttf-sazanami-gothic ttf-kochi-mincho ttf-sazanami-mincho ttf-arphic-uming libmyodbc odbc-postgresql tdsodbc unixodbc-bin The following NEW packages will be installed: gsfonts-x11… Read more »
B G Kavinga
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B G Kavinga

First check your internet connection, if it’s working do as follows.
>sudo apt-get update
>sudo apt-get install sun-java6-jdk

or
check http://bgkavinga.blogspot.com/2011/09/start-up-minicom-sudo-minicom-s.html
for offline installation.

sanjay
Guest
sanjay

please check the root directory once

Gihan
Guest
Gihan

This will be use full if you have no internet access in your machine.

<a href="http://bgkavinga.blogspot.com/2011/09/start-up-minicom-sudo-minicom-s.html">Setup Java Development Kit(JDK) on Ubuntu(Offline)</a>
Bayou
Guest
Bayou

Thanks a lot for the instruction. I just downloaded some java plugins into my ubuntu. What folders to put them to in order to be compiled by javac to the correct path.

Dude
Guest
Dude

Sun/Oracle java is no longer in ubuntu or supported, install it from tarball from there website… or this PPA:

sudo add-apt-repository ppa:ferramroberto/java

sudo apt-get update

sudo apt-get install sun-java6-jdk

Russell Lee
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Russell Lee

is that all u do?

Meee
Guest
Meee

Thank you GGG, working perfectly. :D

suho
Guest
suho

To install Oracle Java 7 and 6 on Ubuntu 12.04 this post will help
http://suhothayan.blogspot.com/2012/04/how-to-instal-java-in-ubuntu.html

Ranjan Singh
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Ranjan Singh

I tried many times for installing java as same code as Windows….but not to do that..
But It is easy as according to your Instruction.

Santosh
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Santosh

Thank u…

CV
Guest
CV

Thank you!

Adria Figuera
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Adria Figuera

Hi from Catalonia! mkyong you save my java developments and when I want something for linux it seems your web is also the best… Congratulations for your web and keep on!!!

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bruno
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bruno

thankzzzz!

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Brandon
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Brandon

This will work, but the proper way to do this is to use…

sudo apt-get install sun-java6-jdk sun-java6-jre

Rajesh
Guest
Rajesh

to install jdk use this
sudo apt-get install openjdk-6-jdk openjdk-6-jre
Looks like oracle just changed the package names to get rid of ‘sun’ from the name.

Mike
Guest
Mike

Open JDK is a different package entirely: http://openjdk.java.net/

Although it works for almost everything you’d want to do.

hooman raesi
Guest
hooman raesi

The apt-get install sun-java6-jdk sun-java6-jre doesn’t work for me , i use openjdk and now i have jdk on my system
thanks alot

Martin
Guest
Martin

export JAVA_HOME=”/usr/lib/jvm/java-6-sun-1.6.0.06;”

I guess you don’t need a semicolon here, do you?

manandvan
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manandvan

thanks akumu for your tips. i dont know why java dont make self installing setup file like windows.

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[…] source […]

Luiz Eduardo
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Luiz Eduardo

i think you forgot to append this to bashrc

export PATH=$PATH:$JAVA_HOME/bin

vincent
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vincent

thanks to kishore and his links….. i could install jdk without internet connection on my machine.

http://kishor15389.blogspot.com/2010/11/install-jdk-on-ubuntu-any-version.html

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How to install the JDK on Ubuntu Linux - Java Programming Forums

[…] JAVA_HOME="/usr/lib/jvm/java-6-sun-1.6.0.06;" Ported from: How to install java jdk on ubuntu (linux) function fbs_click() […]

Kishor
Guest
Kishor

IF U ARE LOOKING TO INSTALL JDK WITHOUT INTERNET CONNECTION.!IT IS POSSIBLE

IF DOWNLOAD IT FROM OTHER SYSTEM WHICH HAVE INTERNET…

IT TAKE FEW STEPS TO INSTALL THAT..

FOR MORE DETAILED STEPS PLEASE VISIT FALLOWING LINK:

http://kishor15389.blogspot.com/2010/11/install-jdk-on-ubuntu-any-version.html

I’M SURE IT DEFINITELY WORKS…

manikandan
Guest
manikandan

what means “remastering sys “