I am trying to install the Java Development Kit (JDK) on Ubuntu Linux distribution, but I am unable to install it. What are the steps to install it on Ubuntu? 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.

• Linux Jdk Install
• Install Java Jdk On Windows 10

Status: Deprecated

This article covers a version of Ubuntu that is no longer supported. If you are currently operating a server running Ubuntu 12.04, we highly recommend upgrading or migrating to a supported version of Ubuntu:

• Upgrade to Ubuntu 14.04.

Reason:Ubuntu 12.04 reached end of life (EOL) on April 28, 2017 and no longer receives security patches or updates. This guide is no longer maintained.

See Instead:
This guide might still be useful as a reference, but may not work on other Ubuntu releases. We strongly recommend using the following guide for working with Java on Ubuntu: How To Install Java with Apt-Get on Ubuntu 16.04.

Introduction

Having Java installed is a prerequisite for many articles and programs. This tutorial will guide you through the process of installing and managing different versions of Java on Ubuntu 12.04.

Installing default JRE/JDK

This is the recommended and easiest option. This will install OpenJDK 6 on Ubuntu 12.04 and earlier and on 12.10+ it will install OpenJDK 7.

Installing Java with apt-get is easy. First, update the package index:

Then, check if Java is not already installed:

If it returns 'The program java can be found in the following packages', Java hasn't been installed yet, so execute the following command:

This will install the Java Runtime Environment (JRE). If you instead need the Java Development Kit (JDK), which is usually needed to compile Java applications (for example Apache Ant, Apache Maven, Eclipse and IntelliJ IDEA execute the following command:

The JDK is usually only necessary if you are going to compile Java programs or if your software specifically requires it in addition to Java. Since the JDK contains the JRE, there are no disadvantages if you install the JDK instead of the JRE, except for the larger file size.

All other steps are optional and must only be executed when needed.

Installing OpenJDK 7 (optional)

To install OpenJDK 7, execute the following command:

This will install the Java Runtime Environment (JRE). If you instead need the Java Development Kit (JDK), execute the following command:

Installing Oracle JDK (optional)

The Oracle JDK is the official JDK; however, it is no longer provided by Oracle as a default installation for Ubuntu.

You can still install it using apt-get. To install any version, first execute the following commands:

Then, depending on the version you want to install, execute one of the following commands:

Oracle JDK 6

This is an old version but still in use.

Oracle JDK 7

This is the latest stable version.

Oracle JDK 8

This is a developer preview, the general release is scheduled for March 2014. This external article about Java 8 may help you to understand what it's all about.

Linux Jdk Install

Managing Java (optional)

When there are multiple Java installations on your Droplet, the Java version to use as default can be chosen. To do this, execute the following command:

It will usually return something like this if you have 2 installations (if you have more, it will of course return more):

You can now choose the number to use as default. This can also be done for the Java compiler (javac):

Install Java Jdk On Windows 10

It is the same selection screen as the previous command and should be used in the same way. This command can be executed for all other commands which have different installations. In Java, this includes but is not limited to: keytool, javadoc and jarsigner.

Setting the 'JAVA_HOME' environment variable

To set the JAVA_HOME environment variable, which is needed for some programs, first find out the path of your Java installation:

It returns something like:

The path of the installation is for each: Diablo 2 runeword mod.

1. /usr/lib/jvm/java-7-oracle

2. /usr/lib/jvm/java-6-openjdk-amd64

3. /usr/lib/jvm/java-7-oracle

Copy the path from your preferred installation and then edit the file /etc/environment:

In this file, add the following line (replacing YOUR_PATH by the just copied path):

That should be enough to set the environment variable. Now reload this file:

Test it by executing:

If it returns the just set path, the environment variable has been set successfully. If it doesn't, please make sure you followed all steps correctly.