''"GJ" is also an online gaming abbreviation corresponding to "good job", sometimes used in a sarcastic manner.

''"GJ" can also be short for grapefruit juice.

GJ (Generic Java) is a superset of the Java programming language which adds support for generic programming. It was designed by the team who had previously created the Pizza language.

GJ was incorporated, essentially unchanged, into the official Java language version 1.5.

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