HowTo:How to Install Java in Ubuntu/Kubuntu

[Gmaster1440]

This tut will allow you to install a java environment that will allow you to run apps on your firefox/konqueror.

We will now install the following Java packages
sun-java6-bin - Contains the binaries
sun-java6-demo - Contains demos and examples
sun-java6-doc - Contains the documentation
sun-java6-fonts - Contains the Lucida TrueType fonts from the JRE
sun-java6-jdk - Contains the metapackage for the JDK
sun-java6-jre - Contains the metapackage for the JRE
sun-java6-plugin - Contains the plug-in for Mozilla-based browsers
sun-java6-source - Contains source files for the JDK

Installing the Java Runtime Environment

1) In terminal, enter the following command:

sudo apt-get install sun-java6-jre sun-java6-plugin sun-java6-fonts

2) Once it downloads the packages and begins the installation, you’ll get a screen that contains the Sun Operating System Distributor License for Java and hit Enter to continue. You’ll see a dialog that asks you if you agree with the DLJ license terms. Select Yes, and hit Enter; the JRE will finish installing.


Aftermath:

First, check that the JRE is properly installed by running the following command from a terminal.
java -version
You should get similar output
java version “1.6.0″
Java(TM) SE Runtime Environment (build 1.6.0-b105)
Java HotSpot(TM) Client VM (build 1.6.0-b105, mixed mode, sharing)

Making sure java works on Firefox:

Open Firefox and type

about:plugins

in the address bar and check for java plugin.

Making sure Java works on Konqueror

Go to any website that uses a java applet and see if it runs. If it doesn't run, click

Tools

in the Konqueror top bar, go to

HTML Settings

and make sure the "Java" option is ticked.


Feel free to post any questions.

[stevenrushing]

This is my output:

steven@steven-desktop:~$ java -version
java version "1.4.2"
gij (GNU libgcj) version 4.1.2 (Ubuntu 4.1.2-0ubuntu5)

Copyright (C) 2006 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
steven@steven-desktop:~$

But when i try to apt-get the new one, it says I have the most recent version.

Any ideas? =)

Steven Rushing

[gg234]

here is the original article http://www.ubuntugeek.com/how-to-ins...in-ubuntu.html

This tut will allow you to install a java environment that will allow you to run apps on your firefox/konqueror.

We will now install the following Java packages
sun-java6-bin - Contains the binaries
sun-java6-demo - Contains demos and examples
sun-java6-doc - Contains the documentation
sun-java6-fonts - Contains the Lucida TrueType fonts from the JRE
sun-java6-jdk - Contains the metapackage for the JDK
sun-java6-jre - Contains the metapackage for the JRE
sun-java6-plugin - Contains the plug-in for Mozilla-based browsers
sun-java6-source - Contains source files for the JDK

Installing the Java Runtime Environment

1) In terminal, enter the following command:

sudo apt-get install sun-java6-jre sun-java6-plugin sun-java6-fonts

2) Once it downloads the packages and begins the installation, you’ll get a screen that contains the Sun Operating System Distributor License for Java and hit Enter to continue. You’ll see a dialog that asks you if you agree with the DLJ license terms. Select Yes, and hit Enter; the JRE will finish installing.


Aftermath:

First, check that the JRE is properly installed by running the following command from a terminal.
java -version
You should get similar output
java version “1.6.0″
Java(TM) SE Runtime Environment (build 1.6.0-b105)
Java HotSpot(TM) Client VM (build 1.6.0-b105, mixed mode, sharing)

Making sure java works on Firefox:

Open Firefox and type

about:plugins

in the address bar and check for java plugin.

Making sure Java works on Konqueror

Go to any website that uses a java applet and see if it runs. If it doesn't run, click

Tools

in the Konqueror top bar, go to

HTML Settings

and make sure the "Java" option is ticked.


Feel free to post any questions.

[naughtywill]

I have looked and looked and I have not seen an post regarding my following question, so please forgive me if I overlooked something. When I try to install java it always come up to this right here....

The file should be owned by root.root and be copied
to /tmp.

[Press RETURN to try again, 'no' + RETURN to abort] dpkg: error processing sun-java6-doc (--configure):
subprocess post-installation script killed by signal (Interrupt)
Errors were encountered while processing:
sun-java6-doc
E: Sub-process /usr/bin/dpkg returned an error code (1)

What is this and how do I get past this ?

[jespdj]

This is my output:

steven@steven-desktop:~$ java -version
java version "1.4.2"
gij (GNU libgcj) version 4.1.2 (Ubuntu 4.1.2-0ubuntu5)

Copyright (C) 2006 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
steven@steven-desktop:~$

But when i try to apt-get the new one, it says I have the most recent version.

Any ideas? =)

Steven Rushing

You might need to make Sun Java the default by running the following command:

sudo update-alternatives --config java

and selecting Sun Java.

[Compyx]

I have looked and looked and I have not seen an post regarding my following question, so please forgive me if I overlooked something. When I try to install java it always come up to this right here....
What is this and how do I get past this ?

Somehow the quoting got mangled a bit, but these are the messages/instructions mentioned:

Selecting previously deselected package sun-java6-doc.
(Reading database ... 134351 files and directories currently installed.)
Unpacking sun-java6-doc (from .../sun-java6-doc_6-00-2ubuntu2_all.deb) ...
Setting up sun-java6-doc (6-00-2ubuntu2) ...
This package is an installer package, it does not actually contain the
JDK documentation.  You will need to go download one of the
archives:

    jdk-6-doc.zip jdk-6-doc-ja.zip

(choose the non-update version if this is the first installation).
Please visit

    http://java.sun.com/javase/downloads/

now and download.  The file should be owned by root.root and be copied
to /tmp.

[Press RETURN to try again, 'no' + RETURN to abort]

So you should do what it says:

Go to http://java.sun.com/javase/downloads/ and click on the "Download" button next to "Java SE 6 Documentation".

In the new page, click on the 'Accept License Agreement' radio button.

Now click on the package you want (English or Japanese) and save it somewhere in your home directory or on your Desktop.

Open a new terminal emulator and (assuming you've downloaded the package to your Desktop), do:

sudo cp Desktop/jdk-6-doc.zip /tmp

You can then continue with the installation (by pressing enter in the terminal emulator with apt-get/aptitude running, or Synaptic): the installer doesn't give a lot of feedback, but you should see something similar to this:

/tmp/jdk-6-doc.zip has been unpacked and installed.
You can now delete it, if you wish.

Which means everthing went well. You don't have to remove the package from /tmp yourself, it'll get deleted on your next boot anyway.

[amadeov]

I installed all of the packages that you suggested and I still can't get Java working. I'm running Feisty and Firefox 2.0.0.3 (I believe).

When I run "java -version" I get back:

java version "1.6.0"
Java(TM) SE Runtime Environment (build 1.6.0-b105)
Java HotSpot(TM) Client VM (build 1.6.0-b105, mixed mode, sharing)

So, I know that Java 1.6.0 is installed... and when I run "sudo update-alternatives --config java", it is set to the following:

*         1    /usr/lib/jvm/java-6-sun/jre/bin/java.

So, Java should be configured properly. However, java will NOT work in firefox. When I look in "aboutlugins", NOTHING is listed.

Any ideas?

[Yggdrasill]

What is the install path for Java 1.6 in Gnome? I need to know in order to initiate initiate Java in Konqueror.

[ant_999]

after installing the java-doc, where can I access it? where is index.html in the doc dir?

Somehow the quoting got mangled a bit, but these are the messages/instructions mentioned:

Selecting previously deselected package sun-java6-doc.
(Reading database ... 134351 files and directories currently installed.)
Unpacking sun-java6-doc (from .../sun-java6-doc_6-00-2ubuntu2_all.deb) ...
Setting up sun-java6-doc (6-00-2ubuntu2) ...
This package is an installer package, it does not actually contain the
JDK documentation.  You will need to go download one of the
archives:

    jdk-6-doc.zip jdk-6-doc-ja.zip

(choose the non-update version if this is the first installation).
Please visit

    http://java.sun.com/javase/downloads/

now and download.  The file should be owned by root.root and be copied
to /tmp.

[Press RETURN to try again, 'no' + RETURN to abort]

So you should do what it says:

Go to http://java.sun.com/javase/downloads/ and click on the "Download" button next to "Java SE 6 Documentation".

In the new page, click on the 'Accept License Agreement' radio button.

Now click on the package you want (English or Japanese) and save it somewhere in your home directory or on your Desktop.

Open a new terminal emulator and (assuming you've downloaded the package to your Desktop), do:

sudo cp Desktop/jdk-6-doc.zip /tmp

You can then continue with the installation (by pressing enter in the terminal emulator with apt-get/aptitude running, or Synaptic): the installer doesn't give a lot of feedback, but you should see something similar to this:

/tmp/jdk-6-doc.zip has been unpacked and installed.
You can now delete it, if you wish.

Which means everthing went well. You don't have to remove the package from /tmp yourself, it'll get deleted on your next boot anyway.

[haloedrain]

I installed the sun-java6-jre and -jdk packages, but when I type java -version I get

The program 'java' can be found in the following packages:
* j2re1.4
* gij-4.1
* kaffe
* jamvm
* java-gcj-compat
* cacao
* sablevm
Try: sudo apt-get install <selected package>
Make sure you have the 'universe' component enabled
bash: java: command not found

I also tried the update-alternatives thing, it didn't help.

The javac command seems to work just fine, though.


Edit: the following command fixed it:

update-java-alternatives --set java-6-sun

I found that in /usr/share/doc/sun-java6-bin/README.alternatives