Java survival kit

- Java2 (1998)

• Collections
  
• JavaWorld article on Collections
  

- Java5 (2004): Generics and enum

• Generics
  
• Annotations

- Java6 (2006)

• Web Services
• All developers get first-class support for writing XML web service client applications. No messing with the plumbing: You can expose your APIs as .NET interoperable web services with a simple annotation. Not your style? Want to handle the XML directly? Knock yourself out: Java SE 6 adds new parsing and XML to Java object-mapping APIs, previously only available in Java EE platform implementations or the Java Web Services Pack.

- Java8 (LTS, 2014 )

• Java Stream API
  
• Lambda expressions

- Java11 (LTS  2018)

- Java17 (LTS.  2021)

- annotations

• Java8 annotations
• Java15 annotations

- alternatives
  - alternatives (works with "java" and "javac")

/usr/bin/update-alternatives --config java
/usr/bin/update-alternatives --install

http://askubuntu.com/questions/56104/how-can-i-install-sun-oracles-proprietary-java-jdk-6-7-8-or-jre

- To switch from open-jdk to Sun Hotspot JDK on ubuntu:
  sudo update-alternatives --set    java    /usr/lib/jvm/jdk1.7.0_67/bin/java

- other notes

• keywords const and goto are reserved, even though they are not currently used
  
• // @formatter:off
• 
  
• JAVA_HOME when using Java11
• in .bash_profile:       export JAVA_HOME=$(/usr/libexec/java_home)

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