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Java is a programming language and runtime environment which allows programs to run unchanged on most platforms.

Most questions about java should be directed to stackoverflow.com, but if the question is more about using java to access a database or using java from within a database, then it could be on topic here.

Background

Java was originally developed by James Gosling at Sun Microsystems (which has since merged into Oracle Corporation) and released in 1995 as a core component of Sun Microsystems' Java platform. The language derives much of its syntax from C and C++ but has a simpler object model and fewer low-level facilities. Java applications are typically compiled to bytecode (class file) that can run on any Java Virtual Machine (JVM) regardless of computer architecture. Java is a general-purpose, concurrent, class-based, object-oriented language that is specifically designed to have as few implementation dependencies as possible. It is intended to let application developers "write once, run anywhere" (WORA), meaning that code that runs on one platform does not need to be recompiled to run on another. Java is currently one of the most popular programming languages in use, particularly for client-server web applications, with a reported 10 million users.

Principles

There were five primary goals in the creation of the Java language:

  1. It should be "simple, object-oriented and familiar"
  2. It should be "robust and secure"
  3. It should be "architecture-neutral and portable"
  4. It should execute with "high performance"
  5. It should be "interpreted, threaded, and dynamic"

Versions

Major release versions of Java, along with their release dates:

JDK 1.0 (January 23, 1996)
JDK 1.1 (February 19, 1997)
J2SE 1.2 (December 8, 1998)
J2SE 1.3 (May 8, 2000)
J2SE 1.4 (February 6, 2002)
J2SE 5.0 (September 30, 2004)
Java SE 6 (December 11, 2006)
Java SE 7 (July 28, 2011)
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