Install Oracle Java SE 7 JDK & Eclipse 4.2.1 (Juno) in Ubuntu 12.04

[Java Platform, Standard Edition Development Kit (JDK)]

Introduction:

• Official website: http://www.oracle.com/technetwork/java/javase/overview/index.html
• Download: http://www.oracle.com/technetwork/java/javase/downloads/index.html
• Document: http://www.oracle.com/technetwork/java/javase/documentation/index.html
• API: http://www.oracle.com/technetwork/java/javase/documentation/api-jsp-136079.html

Installation:

• Reference: http://www.devsniper.com/ubuntu-12-04-install-sun-jdk-6-7/
• Reference: http://www.devsniper.com/how-to-update-sun-jdk-7-on-ubuntu-12-04/

1. [Comment] Download the tarball and extract it
2. [Comment] First, visit the download page and choose the one suitable for your system
   
   
   
   
3. sp@simple-plan:~$ tar -zxvf jdk-7u9-linux-i586.tar.gz
4. [Comment] Install Java
5. sp@simple-plan:~$ sudo mkdir -p /usr/local/jvm
6. sp@simple-plan:~$ sudo mv ./jdk1.7.0_09 /usr/local/jvm

Linking relationship:

1. [Comment] Maintain symbolic links
2. sp@simple-plan:~$ sudo update-alternatives --install /usr/local/bin/javac javac /usr/local/jvm/jdk1.7.0_09/bin/javac 1
3. sp@simple-plan:~$ sudo update-alternatives --install /usr/local/bin/java java /usr/local/jvm/jdk1.7.0_09/bin/java 1
4. sp@simple-plan:~$ sudo update-alternatives --install /usr/local/bin/jar jar
   /usr/local/jvm/jdk1.7.0_09/bin/jar 1
5. [Comment] If you have multiple version of JDK in the system, you could config them
6. sp@simple-plan:~$ sudo update-alternatives --config javac
7. sp@simple-plan:~$ sudo update-alternatives --config java
8. sp@simple-plan:~$ sudo update-alternatives --config jar

Setting Java home path:

1. [Comment] Configure Java home path
2. sp@simple-plan:~$ vim ~/.bashrc

   # Append the configures to the file
   ...
   JAVA_HOME=/usr/local/jvm/jdk1.7.0_09/
   export JAVA_HOME
   JRE_HOME=/usr/local/jvm/jdk1.7.0_09/jre
   export JRE_HOME
   CLASSPATH=.:$JAVA_HOME/lib:$JRE_HOME/lib:$CLASSPATH
   export CLASSPATH
   PATH=$JAVA_HOME/bin:$JRE_HOME/bin:$PATH
   export PATH
   ...

3. sp@simple-plan:~$ source ~/.bashrc
4. [Comment] Add man path
5. sp@simple-plan:~$ sudo vim /etc/manpath.config
   

   ...
   19 #
   20 MANDATORY_MANPATH         /usr/man
   21 MANDATORY_MANPATH         /usr/share/man
   22 MANDATORY_MANPATH         /usr/local/share/man
   23 MANDATORY_MANPATH         /usr/local/jvm/jdk1.7.0_09/man
   24 #---------------------------------------------------------
   ...

Checking version:

1. [Comment] Java version test
2. sp@simple-plan:~$ java -version
   java version "1.7.0_09"
   Java(TM) SE Runtime Environment (build 1.7.0_09-b05)
   Java HotSpot(TM) Client VM (build 23.5-b02, mixed mode)

Uninstall Java SE 7 JDK:

1. [Comment] Remove  Java directory
2. sp@simple-plan:~$ sudo rm -rf /usr/local/jvm/jdk1.7.0_09/
3. [Comment] Remove  links of Java
4. sp@simple-plan:~$ sudo update-alternatives --remove javac /usr/local/jvm/jdk1.7.0_09/bin/javac
5. sp@simple-plan:~$ sudo update-alternatives --remove java /usr/local/jvm/jdk1.7.0_09/bin/java
6. sp@simple-plan:~$ sudo update-alternatives --remove jar /usr/local/jvm/jdk1.7.0_09/bin/jar

[Eclipse 4.2.1 (Juno)]

Introduction:

• Official website: http://www.eclipse.org/
• Download: http://www.eclipse.org/downloads/
• Document: http://help.eclipse.org/juno/index.jsp

Installation:

• Reference: http://akovid.blogspot.tw/2012/08/installing-eclipse-juno-42-in-ubuntu.html
• Reference: http://blog.brunobraga.net/eclipse-42-in-ubuntu-1204

1. [Comment] Download the tarball and extract it.
2. sp@simple-plan:~$ tar -zxvf eclipse-SDK-4.2.1-linux-gtk.tar.gz
3. [Comment] Move eclipse to an appropriate directory
4. sp@simple-plan:~$ sudo mv ./eclipse /opt/
5. [Comment] Make a link
6. sp@simple-plan:~$ sudo update-alternatives --install /usr/bin/eclipse eclipse /opt/eclipse/eclipse 1
7. [Comment] Add eclipse to unity
8. sp@simple-plan:~$ sudo vim /usr/share/applications/eclipse.desktop

   # Add the following into the file
   
   [Desktop Entry]
   Version=4.2
   Name=Eclipse
   Comment=Java Integrated Development Environment
   Exec=/opt/eclipse/eclipse
   Type=Application
   Icon=/opt/eclipse/icon.xpm
   Terminal=false
   NoDisplay=false
   Categories=Java;Development;IDE
   

   
   

Uninstall Eclipse:

1. [Comment] Remove eclipse directory
2. sp@simple-plan:~$ sudo rm -rf /opt/eclipse
3. [Comment] Remove links of eclipse
4. sp@simple-plan:~$ sudo update-alternatives --remove eclipse /opt/eclipse/eclipse
5. sp@simple-plan:~$ sudo rm -rf /usr/share/applications/eclipse.desktop