Ubuntu – Installing oracle java jdk 1.8.0_45 manually

Download the Oracle java from its offical website

Download Java From Official website Here

Manually Install the JDK 1.7

#java -version

#sudo mkdir -p /usr/lib/jvm

#sudo mv jdk-7u21-linux-i586.tar.gz /usr/lib/jvm

#cd /usr/lib/jvm

#sudo tar zxvf jdk-7u21-linux-i586.tar.gz

#sudo rm jdk-7u21-linux-i586.tar.gz

#ls -l

#jdk1.7.0_21

#sudo update-alternatives --install "/usr/bin/javac" "javac" "/usr/lib/jvm/jdk1.7.0_21/bin/javac" 1

#sudo update-alternatives --install "/usr/bin/java" "java" "/usr/lib/jvm/jdk1.7.0_21/bin/java" 1

#sudo update-alternatives --set "javac" "/usr/lib/jvm/jdk1.7.0_21/bin/javac"

#sudo update-alternatives --set "java" "/usr/lib/jvm/jdk1.7.0_21/bin/java"

#sudo vi /etc/profile

Add the following entries to the bottom of your /etc/profile file:

#JAVA_HOME=/usr/lib/jvm/jdk1.7.0_21 PATH=$PATH:$JAVA_HOME/bin export JAVA_HOME export PATH

#. /etc/profile

#java -version

Replace the jdk1.7.0_21 With the version u have Downloaded

You should first convert .rpm file to .deb which is the installation file format in ubuntu.

sudo alien -d sqldeveloper-4.0.2.15.21-1.noarch.rpm

Then install that .deb file by :

sudo dpkg -i sqldeveloper-4.0.2.15.21-1.noarch.deb