问题
Java ME is quite sparse on features. Are there any libraries you use to add missing features?
I don't want to focus on UI libraries - these are better discussed here. I am aware of that there exists JSRs with optional features.
回答1:
There is some useful stuff at j4me.org.
回答2:
For various crypto functions, The Legion of the Bouncy Castle Lightweight API for J2ME.
回答3:
Java ME was intentionally designed to be based on JDK 1.3, so yes it is quite old and sparse. But a lot of handset manufacturers (like Nokia) have their custom API that provide some valuable functionality.
There are ways to provide support to more standard Java like features like enums by using tools like Retroweaver, which allow us to compile them with Java ME.
I have also heard that J2ME Polish like frameworks have custom implementations that are more sophisticated. Hope this helps.
回答4:
The Microlog logging library is a quite handy library for logging:
http://microlog.microsuite.org/
来源：https://stackoverflow.com/questions/2422555/java-me-libraries