what is a plug in in java?

Question

pls tell me what is meant by plugin in java.
pls give me a smaill example how to develop
a plug in.

Answer 1

a plugin in java is simple a plugin within the IDE.
For example. Eclipse IDE is one of hte powerfull IDE's in the market which is opensource. And to do plugin development you use the PDE within Eclipse. IT is relatively easy once you get the hang of it

If you meant how ot create plugins for some application, then you could do this in many ways... Each plugin should be its own project thus its own jar file. Now each jar file should follow some sort of abstract interface so each plugin will have some sort of similarities that the main application has. There are many patterns that discuss plugin developement in your application. For example , Service Locator and plugin pattern. There are many patterns you could use, you have to research to see which one best fits your purpose.