Java is required on the application server machine. WebOffice 10.4 SP2 is certified for Java SE Development Kit 8u112 (64bit).
The version can be downloaded at:
Note: In case the WebOffice setup will be used to install WebOffice 10.4 SP2, Java SE Development Kit 8u112 (64bit) is included within the setup and will be installed automatically.
Note: Make sure to download the Windows 64bit version (jdk-8u112-windows-x64.exe).
Start the installation process after the download with a double click on the file. The setup will guide you through the installation, all default settings can be left unchanged. Java will be installed to the directory C:\Program Files\Java\jdk1.8.0_112\.
Java SE Development Kit installation