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- ---
- title: Installing Java
- order: 30
- layout: page
- ---
-
- [[installing.java]]
- = Installing Java SDK
-
- A Java SDK is required by Vaadin and also by any of the Java IDEs.
- Vaadin Framework 8 requires Java 8.
- Java EE 7 is required for proper server push support with WebSockets.
-
- [[installing.java.windows]]
- == Windows
-
- Follow the following steps:
-
- . Download Oracle Java SE 8.0 from
- link:http://www.oracle.com/technetwork/java/javase/downloads/index.html[http://www.oracle.com/technetwork/java/javase/downloads/index.html]
-
- . Install the Java SDK by running the installer.
- The default options are fine.
-
- [[installing.linux]]
- == Linux / UNIX
-
- Most Linux systems either have JDK preinstalled or allow installing it through a
- package management system. Notice however that they have OpenJDK as the default
- Java implementation. While it is known to have worked with Vaadin Framework and possibly
- also with the development toolchain, we do not especially support it.
-
- Depending on your OS distribution, you may have to download Java JDK 8:
-
- . Download Oracle Java SE 8.0 from
- link:http://www.oracle.com/technetwork/java/javase/downloads/index.html[http://www.oracle.com/technetwork/java/javase/downloads/]
-
- . Decompress it under a suitable base directory, such as [filename]#/opt#. For
- example, for Java SDK, enter (either as root or with [command]#sudo# in Linux):
-
- +
- [subs="normal"]
- ----
- [prompt]#+++#+++# [command]#cd# [replaceable]#/opt#
- [prompt]#+++#+++# [command]#sh# [replaceable]##<path>##/jdk-[replaceable]##<version>##.bin
- ----
- +
- and follow the instructions in the installer.
-
- . Set up the [literal]#++JAVA_HOME++# environment variable to point to the Java
- installation directory. Also, include the [literal]#++$JAVA_HOME/bin++# in the
- [literal]#++PATH++#. How you do that varies by the UNIX variant. For example, in
- Linux and using the Bash shell, you would add lines such as the following to the
- [filename]#.bashrc# or [filename]#.profile# script in your home directory:
-
- +
- ----
- export JAVA_HOME=/opt/jdk1.8.0_31
- export PATH=$PATH:$HOME/bin:$JAVA_HOME/bin
- ----
- +
- You could also make the setting system-wide in a file such as
- [filename]#/etc/bash.bashrc#, [filename]#/etc/profile#, or an equivalent file.
- If you install Apache Ant or Maven, you may also want to set up those in the
- path.
-
- +
- Settings done in a [filename]#bashrc# file require that you open a new shell
- window. Settings done in a [filename]#profile# file require that you log in into
- the system. You can, of course, also give the commands in the current shell.
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