When did Java get a JIT compiler?

问题:

When did Java first get a JIT compiler for production code?

回答1:

Borland had the first one followed shortly by Symantec. Sun licensed the Symantec one. Symantec demoed theirs in March of 1996.

回答2:

http://java.sun.com/features/2000/06/time-line.html

October 25, 1996 Sun announces first Just-In-Time (JIT) compiler for Java platform

Also, from wikipedia: Since JRE version 1.2, Sun's JVM implementation has included a just-in-time compiler instead of an interpreter. http://en.wikipedia.org/wiki/Java_(Sun)

回答3:

I believe HotSpot debuted in 1.3, though it was available as a plugin to 1.2.

More info at http://en.wikipedia.org/wiki/HotSpot

回答4:

Define production :) Hotspot had JIT.