Ubuntu Linux Install Sun Java Development Kit ( JDK ) and Java Runtime Environment ( JRE )

To install the Sun Java Development Kit (JDK) and Java Runtime Environment (JRE) on Ubuntu Linux, follow these steps:

1. Add the Oracle Java PPA to your system's package sources by typing the following command:

sudo add-apt-repository ppa:webupd8team/java

2. Update the package index by typing the following command:

sudo apt-get update

3. Install the Oracle JDK by typing the following command:

sudo apt-get install oracle-java8-installer

This will install both the JDK and the JRE.

4. To set Oracle Java 8 as the default Java version, type the following command:

sudo apt-get install oracle-java8-set-default

5. To verify the installation, type the following command:

java -version

This will display the version of Java installed on your system.

Note: The Oracle JDK is no longer available for download from Oracle's website. If you want to install a different version of the JDK, you can try downloading it from a third-party website or use the OpenJDK, which is available in the default Ubuntu package repositories. To install the OpenJDK, type the following command:

sudo apt-get install openjdk-8-jdk