The Linked Guides Shows You in Easy-Steps How to Install Oracle-Sun Java SE JDK 8 for Ubuntu GNU/Linux 32/64-bit Desktop/Server.
To SetUp Oracle JDK in you may need to make use of the update-alternatives Tool to Update your System Java.
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Some Java 8 Features:
To the How to Install Oracle JDK 8 in Ubuntu Linux Bottom there is a Link for Quick-Start with Java JDK 8 Development with the Best Java IDEs: Eclipse, NetBeans & IntelliJ IDEA.
The Contents and Details of How to Install Oracle JDK 8 in Ubuntu Linux are Expressly Minimal to Give Focus Only to the Essentials Instructions and Commands and Make the Tut Easier to Understand ;)
How to Install Eclipse for Java 8 Development on Ubuntu: Installing Eclipse IDE for Java 8 on Ubuntu.
How to Install Netbeans 8 IDE for Java on Ubuntu: Installing NetBeans IDE for Java Development on Ubuntu.
How to Install IntelliJ IDEA for Java & Android on Linux Ubuntu
SetUp IntelliJ on Ubuntu.
Installing Apache Tomcat 8 Server on Ubuntu
SetUp Tomcat 8 Ubuntu.
Java and the JVM (Java's virtual machine) are widely used and required for many kinds of software. This article will guide you through the process of installing and managing different versions of Java using apt-get.
To follow this tutorial, you will need:
One Ubuntu 16.04 server.
A sudo non-root user, which you can set up by following the Ubuntu 16.04 initial server setup guide.
The easiest option for installing Java is using the version packaged with Ubuntu. Specifically, this will install OpenJDK 8, the latest and recommended version.
First, update the package index.
Next, install Java. Specifically, this command will install the Java Runtime Environment (JRE).
There is another default Java installation called the JDK (Java Development Kit). The JDK is usually only needed if you are going to compile Java programs or if the software that will use Java specifically requires it.
The JDK does contain the JRE, so there are no disadvantages if you install the JDK instead of the JRE, except for the larger file size.
You can install the JDK with the following command:
If you want to install the Oracle JDK, which is the official version distributed by Oracle, you will need to follow a few more steps.
First, add Oracle's PPA, then update your package repository.
Then, depending on the version you want to install, execute one of the following commands:
This is the latest stable version of Java at time of writing, and the recommended version to install. You can do so using the following command:
This is a developer preview and the general release is scheduled for March 2017. It's not recommended that you use this version because there may still be security issues and bugs. There is more information about Java 9 on the official JDK 9 website.
To install JDK 9, use the following command:
There can be multiple Java installations on one server. You can configure which version is the default for use in the command line by using update-alternatives, which manages which symbolic links are used for different commands.
The output will look something like the following. In this case, this is what the output will look like with all Java versions mentioned above installed.
You can now choose the number to use as a default. This can also be done for other Java commands, such as the compiler (javac), the documentation generator (javadoc), the JAR signing tool (jarsigner), and more. You can use the following command, filling in the command you want to customize.
Many programs, such as Java servers, use the JAVA_HOME environment variable to determine the Java installation location. To set this environment variable, we will first need to find out where Java is installed. You can do this by executing the same command as in the previous section:
Copy the path from your preferred installation and then open /etc/environment using nano or your favorite text editor.
At the end of this file, add the following line, making sure to replace the highlighted path with your own copied path.
Save and exit the file, and reload it.
You can now test whether the environment variable has been set by executing the following command: Serial number idm gratis.
This will return the path you just set.
You have now installed Java and know how to manage different versions of it. You can now install software which runs on Java, such as Tomcat, Jetty, Glassfish, Cassandra, or Jenkins.