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Java Based OPC UA Client SDK

OPC UA Java SDK Client implements the necessary client side infrastructure, including Connection & Session management, Subscription management, Node caching and the necessary Security infrastucture. It also defines a pure Java style interface to most of the service calls, including a centralized response handling, converting service and operation level errors to exceptions. The service handlers enable you to connect your own application logic easily to actually handle the data available from the OPC UA servers.

The Java based Client SDK requires Java 6 SE or newer. The Client SDK is also available as bundle with the Server SDK. We’re offering the Java based SDK from our development partner Prosys.


Product Variants

EditionsWindows Binary, Linux Binary, Windows Source, Linux Source
License TypesSingle Developer License, Evaluation License
Target PlatformsJava SE 6 (JRE 1.6), Java SE 7 (JRE 1.7), Java SE 8 (JRE 1.8)
DevelopmentIntegrates into Eclipse, Shell Scripts, Batch Files

Read the complete software license agreement.

Supported Features and Profiles

  • Data Access
  • Events
  • Methods
  • Alarms & Conditions
  • Historical Access

More detailed information can be found on the next tab.

OPC UA Features and Profiles

General Base Client Behaviour Facet, Core Client Facet, AddressSpace Lookup Client Facet, Discovery Client Facet, Advanced Type Programming Client Facet, Redundant Client Facet
Data AccessAttribute Read Client Facet, Attribute Write Client Facet, DataChange Subscriber Client Facet, DataAccess Client Facet
EventsEvent Subscriber Client Facet, Auditing Client Facet
MethodsMethod Client Facet
Alarms & Conditions A&C Simple Client Facet, A&C Address Space Instance Client Facet, A&C Enable Client Facet, A&C Alarm Client Facet, A&C Exclusive Alarm Client Facet, A&C Non-Exclusive Alarm Client Facet, A&C Previous Instance Client Facet, A&C Dialog Client Facet
Historical Accesssupported

Scope of Supply

  • UA Stack, Base Library, Client Library
  • examples, JavaDoc documentation
  • support package including 5 support incidents
  • first year maintenance package

Related Products and Services


The UaGateway is designed to integrate “classic” OPC products into OPC UA Environments. Its main features are connecting UA clients to COM/DCOM Servers (Wrapper), accessing UA Servers with COM/DCOM clients (Proxy), and tunneling COM/DCOM through a secure UA connection. Please refer to the UaGateway product page for further information.

OPC UA Training

Unified Automation offers seminars, workshop, and hands-on classes to help you getting started with OPC UA and our SDK Products. Please refer to the following pages for more information.

It is also possible to book in-house training tailored to your company’s reqirements.


The book “OPC Unified Architecture” is written by Wolfgang Mahnke, Stefan-Helmut Leitner, and Matthias Damm, one of the trainers of Unified Automation.

“This book provides you a solid foundation to learn everything you could ever want to know about developing world-class products for multi-vendor interoperability based on OPC UA”, says Tom Burke, President of the OPC Foundation