Ubuntu – How to Upgrade Oracle JDK and remove old JDK settings

javaoracle

i searched and not found how to upgrade oracle jdk in here. I'm not satisfied with OpenJDK7 because it doesn't come with Java Compiler.

I have installed and configured Sun Java SDK 6 and I want to upgrade to Oracle JDK 7. I searched ppa's from launchpad an wubp8 but it didn't worked . How can I upgrade Sun JDK 6 to Oracle JDK 7 and also completely remove all Sun JDK 6 settings?

I'm very grateful for your answers.

Best Answer

Upgrade may cause problems , so its better to do a fresh install.

Completely remove Open-jdk

just use this simple commands in terminal to remove open jdk completely

sudo apt-get purge openjdk-\*

How to install Oracle-Java

To get an automatically update-able Java from Oracle, you can you use the PPA provided from webup8.

sudo add-apt-repository ppa:webupd8team/java
sudo apt-get update
sudo apt-get install oracle-java7-installer

Installing Oracle Java manually

For installing Latest Oracle Java:

To check ubuntu system architecture installed

$ uname -m

$ arch

Download the Oracle Java JDK for Linux. Make sure you select the correct compressed binaries for your system architecture 32-bit or 64-bit (which end in tar.gz).It will be downloaded in Downloads folder in home.So first open nautilus with sudo as

sudo nautilus

and make a folder java under

/usr/local/

and then folow the following commands:

cd /home/"your_user_name"/Downloads
sudo cp -r jdk-7u40-linux-x64.tar.gz /usr/local/java
cd /usr/local/java
sudo chmod a+x jdk-7u40-linux-x64.tar.gz
sudo tar xvzf jdk-7u40-linux-x64.tar.gz

At this point you should have two uncompressed binary directories in /usr/local/java check it by

ls -a

Now edit the system path file by

sudo gedit /etc/profile

scroll down to the last and add following lines

JAVA_HOME=/usr/local/java/jdk1.7.0_40
PATH=$PATH:$HOME/bin:$JAVA_HOME/bin
export JAVA_HOME
export PATH

Save and exit and write these commands in terminal to Inform your Ubuntu Linux system where your Oracle Java JDK/JRE is located.

sudo update-alternatives --install "/usr/bin/java" "java" "/usr/local/java/jdk1.7.0_40/bin/java" 1
sudo update-alternatives --install "/usr/bin/javac" "javac" "/usr/local/java/jdk1.7.0_40/bin/javac" 1
sudo update-alternatives --install "/usr/bin/javaws" "javaws" "/usr/local/java/jdk1.7.0_40/bin/javaws" 1
sudo update-alternatives --set java /usr/local/java/jdk1.7.0_40/bin/java
sudo update-alternatives --set javac /usr/local/java/jdk1.7.0_40/bin/javac
sudo update-alternatives --set javaws /usr/local/java/jdk1.7.0_40/bin/javaws
. /etc/profile

Now everything is installed just check it by

java -version

the output must be like

java version "1.7.0_40"
Java(TM) SE Runtime Environment (build 1.7.0_40-b40)
Java HotSpot(TM) Server VM (build 23.1-b03, mixed mode)

Congratulation now its installed.

Related Solutions

Ubuntu – How to remove Oracle JDK

It could be done like this:

Remove the link:

sudo update-alternatives --remove "java" "/usr/lib/jvm/jdk[version]/bin/java"    
sudo update-alternatives --remove "javac" "/usr/lib/jvm/jdk[version]/bin/javac"    
sudo update-alternatives --remove "javaws" "/usr/lib/jvm/jdk[version]/bin/javaws"

Then, remove the package in the /usr/lib/jvm:
```
sudo rm -r /usr/lib/jvm/jdk[version]
```

Note :

Change [version] with any version number that's contained in jdk folder's name, example: jdk[version] = jdk1.7.0_13.
If you are new to Linux, you should probably get familiar with the manual page. Lot of good stuff from there. Just go to the terminal and type man update-alternatives.

Ubuntu – How to remove error message when installing new softwares

Running these commands should fix your problem:

sudo apt-get update
sudo apt-get --purge reinstall oracle-java7-installer
sudo apt-get upgrade

If they do not, then please edit your question to include all the text from the Terminal from when you ran them (as the output would still be diagnostically useful).