J2SE 1.4 (JDK 1.4) (February 6, 2002): Introduced assert, non-blocking IO (nio), logging API, image IO, Java webstart, regular expression support.Introduced Collection Framework and JIT compiler. Included JFC (Java Foundation Classes - Swing, Accessibility API, Java 2D, Pluggable Look and Feel and Drag and Drop). Also released J2EE (Java 2 Enterprise Edition) and J2ME (Java 2 Micro Edition). J2SE 1.2 (JDK 1.2) (December 8, 1998): Re-branded as "Java 2" and renamed JDK to J2SE (Java 2 Standard Edition).JDK 1.1 (February 19, 1997): Introduced AWT event model, inner class, JavaBean, JDBC, and RMI. JDK 1.0 (January 23, 1996): Originally called Oak (named after the oak tree outside James Gosling's office).JDK Alpha and Beta (1995): Sun announced Java in September 23, 1995.Since you are supposed to write Java Programs, you should install JDK, which includes JRE. JDK (Java Development Kit), which includes JRE plus the development tools (such as compiler and debugger), is need for writing as well as running Java programs. JRE (Java Runtime) is needed for running Java programs. Java Development Kit (JDK), officially named "Java Platform Standard Edition ( Java SE)", which is freely available from Sun Microsystems (now part of Oracle), is needed for writing Java programs.
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