http://teavm.org/docs/intro/overview.html，是这样说的：
If you have tightly-coupled applications that use Swing, you want to run
these applications in web, and you don’t care about download size, start-up
time and performance, you should probably look elsewhere; there are more
appropriate tools for you, like CheerpJ.https://www.leaningtech.com/pages/cheerpj.html，说：
- the Java compiler for the Web
- converts any Java client application into standard HTML5/WebAssembly/JavaScript
- works from Java bytecode, without requiring access to the source code
- compatible with 100% of Java (reflection and dynamic classes included)
- turn-key solution, works on Java Swing clients, Java applets, and Java libraries
- actively developed and supported by Leaning Technologies experts
