Component plugin

The Appian documentation search bot at your service: docs.appian.com/.../component-plugins.html

i need one example to connect third party api to get the data from component plugin

No. But this works just the same way as any other HTML/JavaScript development.

I think it might be helpful if you gave a lot more detail on what you're trying to achieve. In general plug-ins aren't necessary for that many things in Appian - there's a lot of out-of-the-box functionality that support integrations. For us to help us, it would be useful to provide a sample of what kind of request / format you're trying to send or more information about the service you're integrating with.

i need to call java sewrvice inside the javascript file

I still have my doubts that this is the right way to go.

But when you need to call a web service inside a component plugin, then do it. In the end, it is HTML/JavaScript.

how to do that while developing a custom component plugin inside js i need to call but i didnt find any examples

This is plain old Javascript development and not Appian specific in any way.

stackoverflow.com/.../how-to-call-a-rest-web-service-api-from-javascript

1.Can I get a sample example code for developing a component plugin in java which will be responsible for taking inputs form appian in json format and handing over it to UI(react js or javascript or html) and taking the response from UI and giving response back to appian 

2.Is it possible using Servlet Plugin?

Would you please share the full picture of your requirements and what you want to achieve. We are are not able to help unless we have a clear higher level picture.

1.Can I get a sample example code for developing a plugin in which will be responsible for taking inputs form appian in json format in java and handing over it to UI(react js or javascript or html) and taking the response from UI and giving response back to appian using java
2. for above can you suggest which plugin is helpful?

we need to develop this in java and react js

we need to develop this in java and react js

And what is the reason to not just build that in Appian? A dynamic UI based on a JSON definition is not exactly simple, but way easier than what you envision.

Actual requirement is need to develop a plugin using java and react

Well ... if this is your requirement ...

I suggest to make yourself familiar with the Appian extension SDK and start to build things based on the available documentation, examples and existing plugins.

Once you have more specific questions, we are happy to support.