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Recently I'm reading an API document,I always see people use '$' sign like this:

Object result = barService.$invoke("sayHello", new String[] { "java.lang.String" }, new Object[] { "World" });

I've searched a long time,still can't get the meaning of this sign.Could anybody tell me how to use '$' and what does it represent for?

Chen.Ulrika
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    Afaik it doesn't have a special meaning on a language level, i.e. you are free to use it in method names, e.g. `void $tupidMethod();`. Thus at that level the meaning is up to the developers of that api. – Thomas Dec 08 '17 at 08:46
  • Java language specification says: The dollar sign should be used only in mechanically generated source code or, rarely, to access pre-existing names on legacy systems. Otherwise, no special meaning. – Ralf Kleberhoff Dec 08 '17 at 09:02

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