====== Java Runtime Environment ======

This section is about programming for the //JRE// in //C++// **not** in //Java//.

===== Installation =====

The //JDK// comprises the //JRE//, so no need to install it apart.

==== Windows ====

Download link : http://www.oracle.com/technetwork/java/javase/downloads/index.html. Choose //JDK//.

On 64 bits //Windows//, if you install both //x64// and //i585// version, the ''java'' command is always the //x64// one.

If working under //Cygwin//, you can create aliases to easily switch between //x86// and //i585// version.

==== GNU/Linux (Debian) ====

The package to install is ''default-jdk''.

<note important>
Although it doesn't complain under //Windows//, under //GNU/Linux// the parameter of ''System.loadLibrary(...)'' should not contain a directory separator. So, the library should be found in ''java.library.path''. The content of the ''LD_LIBRARY_PATH'' is part of this properties.
</note>

==== MacOS ====

Install the corresponding ''.dmg''.

<note tip>
''/usr/libexec/java_home'' displays the //JDK// root path.
</note>

===== Issues =====

==== 'CTRL-C' on 'Cygwin' ====

//CTRL-C// is not handled correctly by the //JRE// under //Cygwin// (//Cygwin// doesn't pass the signal to the //JRE//), i.e. the hooks added with ''Runtime.addShutdownHook(...)'' are not called on //CTRL-C//. There are no known workaround.

https://stackoverflow.com/questions/11757643/