Installing Java 7 for Ubuntu Pricise Pangolin

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Environment used:

- Compaq CQ42 Laptop
- Ubuntu Pricise Pangolin (12.04)
- JDK 7 file (jdk-7-linux-i586.tar.gz)
- Terminal

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Installation Procedures:

My Ubuntu already have Open JDK that also good for development, but what I need is the official Java JDK. I'm going to install JDK 7 for my Ubuntu 12.04. I used steps below for installing JDK:


1. Donwload JDK 7 from here. I am using jdk-7-linux-i586.tar.gz


2. Now extract the file that already downloaded. Open terminal. For example I stored my file at /Downloads folder. Run script like below
tar -xvf ~/Downloads/jdk-7-linux-i586.tar.gz

Extract file

3. Next we need to create a folder to store JDK files and folder. I created 'jdk7' as a folder. Still at terminal then run command below.
sudo mkdir -p /usr/lib/jvm/jdk7


4. Move all extracted files into new location.
sudo mv jdk1.7.0_03/* /usr/lib/jvm/jdk7/


5. Update Java alternative as follows

sudo update-alternatives --install "/usr/bin/java" "java" "/usr/lib/jvm/jdk7/bin/java" 1sudo update-alternatives --install "/usr/bin/javac" "javac" "/usr/lib/jvm/jdk7/bin/javac" 1sudo update-alternatives --install "/usr/bin/javaws" "javaws" "/usr/lib/jvm/jdk7/bin/javaws" 1


6. Select the newest JDK by run each command below

sudo update-alternatives --config java
sudo update-alternatives --config javac
sudo update-alternatives --config javaws

Select JDK alternative

7. Since we change Java Alternative let's set JNI lib SWT into appropriate link
ln -s /usr/lib/jni/libswt-* ~/.swt/lib/linux/x86/

Or if you use Ubuntu 64 bit, run this command below
ln -s /usr/lib/jni/libswt-* ~/.swt/lib/linux/x86_64/
8. Now check Java Version
java -version
javac -version




Now we need to set our Mozila Browser plugin to match with our latest Java version. Let's do some steps as follows:

1. Create Mozilla plugins folder. At Terminal run command below
mkdir ~/.mozilla/plugins/

2. Create symbolic link for Mozilla.
ln -s /usr/lib/jvm/jdk7/jre/lib/i386/libnpjp2.so ~/.mozilla/plugins/

Note: if you using 64-bit systems, replace 'i386' with 'amd64'

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Referrence :

- http://www.liberiangeek.net/2012/04/install-oracle-java-jdk-7-in-ubuntu-12-04-precise-pangolin/

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