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This major release (1.4) introduced IPv6 support , an integrated XML parser, logging APIs, and support for regular expressions. Modern Availability

Necessary to run Java applications on the host machine.

Because this version reached its "End of Life" (EOL) long ago, it is no longer updated with security patches and is not recommended for production use.

The J2SDK provided a development environment for building applications and applets using the Java programming language. It included: Compilers and debuggers.