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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; Escape analysis and lock coarsening; Register allocation improvements; Other ...
JSR 59 was the umbrella specification for J2SE 1.4 and JSR 176 specified J2SE 5.0 (Tiger). Java SE 6 (Mustang) was released under JSR 270. Java Platform, Enterprise Edition (Java EE) is a related specification that includes all the classes in Java SE, plus a number that are more useful to programs that run on servers as opposed to workstations .
Official Oracle page for Java EE Compatibility. Java EE 6 certified – Web Java EE 5 certified J2EE 1.4 certified Licensing GlassFish server Open Source Edition Oracle: Yes v5.0 [29] Yes v5.0 [29] Yes v4.x [30] Yes v4.x [30] Yes v3.x and upward [31] Yes v3.x Web Profile Yes v2.1.x [31] Free software: Oracle GlassFish Server Oracle
Oracle (and others) "highly recommend that you uninstall older versions of Java" than Java 8, [14] because of serious risks due to unresolved security issues. [ 15 ] [ 16 ] [ 17 ] Since Java 9 (as well as versions 10, and 12–16, and 18–20) are no longer supported, Oracle advises its users to "immediately transition" to a supported version.
Update statements such as INSERT, UPDATE and DELETE return an update count indicating the number of rows affected in the database as an integer. [13] These statements do not return any other information. Query statements return a JDBC row result set. The row result set is used to walk over the result set.
The Java language has undergone several changes since JDK 1.0 as well as numerous additions of classes and packages to the standard library.Since J2SE 1.4, the evolution of the Java language has been governed by the Java Community Process (JCP), which uses Java Specification Requests (JSRs) to propose and specify additions and changes to the Java platform.
J2SE 1.4: 48: 13th February 2002: October 2008 — J2SE 5.0 (1.5) 49: 30th September 2004: October 2009 — Java SE 6 (1.6) 50: 11th December 2006: April 2013 for Oracle December 2018 for Azul [3] December 2016 for Red Hat [4] October 2018 for Oracle [5] December 2027 for Azul [3]
A source package for IcedTea 2.x continues to be maintaining in the Java overlay repository. Installing a Java application by default pulls in IcedTea instead of oracle-jdk because it can be installed without extra work from the user, as users have to manually agree to Oracle's EULA to download the oracle-jdk.