Java enums are great. So are generics. Of course we all know the limitations of the latter because of type erasure. But there is one thing I don't understand, Why can't I create an enum like this: ...

...throw an IllegalArgumentException , or a NullPointerException ? From the javadocs, both seem appropriate. Is there some kind of an understood standard? Or is this just one of those things that you should do whatever you prefer and both are really correct? ...

... A guarantee has been added in the Java 7 docs: "Instances of java.util.Random are threadsafe." docs.oracle.com/javase/7/docs/api/java/util/Random.html – Matt R Jul 12 '13 at 14:38 ...

... Why is this blocked by Java? You'd have to ask the Java designers. There might be some subtle grammatical reason for the restriction. Note that some of the array creation / initialization constructs were not in Java 1.0, and (IIRC) were added in ...

...RLs. I tested successfully within RegexBuddy. However, when I copied it as Java String flavor and pasted it into Java code, it does not work. The following class prints false : ...

... thing (especially the multiple assignments) would be frowned upon by most Java developers, who would consider it the opposite of "visually simple". share | improve this answer | ...

... Mark Amery 98.8k4848 gold badges336336 silver badges379379 bronze badges answered Oct 10 '09 at 21:47 CB BaileyC...

... user229044♦ 202k3535 gold badges298298 silver badges309309 bronze badges answered Oct 24 '11 at 23:13 Adam DymitrukAdam Dymitruk ...

... Mark Amery 98.9k4848 gold badges336336 silver badges379379 bronze badges answered Jul 26 '13 at 9:14 SpudleySpud...

...is (a) requiring 3rd party libs and (b) expensive. – javadba Jan 23 '14 at 21:24 This only work with spring frame work...