How do you know what version methods became available ?

A reply to another one of my posts informed me that String.replaceAll did not become available until version 1.4.
How could I find out what version methods became available?
I think I'm experiencing a similar situation with String.ValueOf.
Thanks in advance.

If you look at the API docs for the version you have (you're on 1.2, right? shudder) then everything in there is available in your version.
Some methods, but not all, have a "Since" section that say when it became availalbe. For instance, [url http://java.sun.com/j2se/1.5.0/docs/api/java/lang/String.html#replaceAll(java.lang.String, java.lang.String)]String.replaceAll says "Since 1.4".
String.valueOf's various signatures have been around for a long time, I think. Note that it's v, not V.

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