I am looking for some libraries and some examples to create an client OPC application in Java which could connect with opc server. Thanks in advance.
UA Java is an OPC UA stack and a number of sample applications. The official OPC Foundation OPC UA Java Stack and sample applications. Donated to the community for development of OPC UA applications and to assure that OPC UA becomes the defacto-standard technology for the Industrial-Internet-of-Things and Industrie 4.0.
They offer different links for this area: Utgard is an open source project offering an OPC library written in pure native Java, i.e. with no dependency on JNI or other DLLs. It is licensed under the GPL.
Client software for alarm notification and remote control, using a variety of wired, wireless and mobile technologies. Demo download runs for one hour before requiring restart, but otherwise unrestricted. Control See OPC Clients for Microsoft Office Product
With Prosys OPC UA SDK for Java it is easy to develop secure OPC UA clients and servers, that execute almost on any device and on any platform. You can quickly implement globally accepted, standardized and reliable OPC UA communications.
Have you checked out OPC Client Programming with Java?
They offer different links for this area:
Utgard is an open source project offering an OPC library written in pure native Java, i.e. with no dependency on JNI or other DLLs. It is licensed under the GPL.
Antonín Fischer's Java OPC Client is now greatly enhanced and hosted on SourceForge. It uses a JNI layer coded in Delphi. Full source code (both Java and Delphi) is provided.
I think what you are looking for is Utgard, you can find sample code in the documentation sections, respectively in the project source code under documentation.
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