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Both version numbers "1.5.0" and "5.0" are used to identify this release of the Java 2 Platform Standard Edition. Version "5.0" is the product version, while "1.5.0" is the developer version. The number "5.0" is used to better reflect the level of maturity, stability, scalability and security of the J2SE.
The platform was known as Java 2 Platform, Standard Edition or J2SE from version 1.2, until the name was changed to Java Platform, Standard Edition or Java SE in version 1.5. The "SE" is used to distinguish the base platform from the Enterprise Edition and Micro Edition platforms. The "2" was originally intended to emphasize the major changes ...
Java version overview Version Type Class file format version [1] Release date End of public updates (free) End of extended support (paid) JDK 1.0: 45 [2] 23rd January 1996: May 1996 — JDK 1.1: 45: 18th February 1997: October 2002 — J2SE 1.2: 46: 4th December 1998
J2SE 1.2 (December 8, 1998) – Codename Playground. This and subsequent releases through J2SE 5.0 were rebranded Java 2 and the version name "J2SE" (Java 2 Platform, Standard Edition) replaced JDK to distinguish the base platform from J2EE (Java 2 Platform, Enterprise Edition) and J2ME (Java 2 Platform, Micro Edition).
JDK 1.1.6: First just-in-time compilation (Symantec's JIT-compiler) [2] [22] J2SE 1.2: Use of a generational collector. J2SE 1.3: Just-in-time compiling by HotSpot. J2SE 1.4: See here, for a Sun overview of performance improvements between 1.3 and 1.4 versions. Java SE 5.0: Class data sharing [23] Java SE 6: Split bytecode verification
The first Java GUI toolkit was the Abstract Window Toolkit (AWT), introduced with Java Development Kit (JDK) 1.0 as one component of Sun Microsystems' Java platform. The original AWT was a simple Java wrapper library around native (operating system-supplied) widgets such as menus, windows, and buttons.
Jakarta EE, formerly Java Platform, Enterprise Edition (Java EE) and Java 2 Platform, Enterprise Edition (J2EE), is a set of specifications, extending Java SE [1] with specifications for enterprise features such as distributed computing and web services. [2]
J2EE 1.3, J2SE 1.2: Addition of Filter: Java Servlet 2.2: August 1999: JSR 902, JSR 903: J2EE 1.2, J2SE 1.2: Becomes part of J2EE, introduced independent web applications in .war files Java Servlet 2.1: November 1998: 2.1a: Unspecified: First official specification, added RequestDispatcher, ServletContext: Java Servlet 2.0: December 1997 ...