In Java there's just Math.random(), and it's been broken, with WONTFIX, since 1998.
Java's random number generator returns exceptionally non-random values, but Sun, er, Oracle, won't fix it because of the most insane of reasons: unlike in any reasonable language, Java's PRNG essentially has a contract to be deterministic. There's seemingly a worry that someone, somewhere, is actually relying on java.util.Random to always produce the same random number sequence for a given seed from Java version to version.
Java's random number generator returns exceptionally non-random values, but Sun, er, Oracle, won't fix it because of the most insane of reasons: unlike in any reasonable language, Java's PRNG essentially has a contract to be deterministic. There's seemingly a worry that someone, somewhere, is actually relying on java.util.Random to always produce the same random number sequence for a given seed from Java version to version.