Java Incompatibilities

Compatibility Guide for JDK 8
http://www.oracle.com/technetwork/java/javase/8-compatibility-guide-2156366.html

Java SE 7 and JDK 7 Compatibility
http://www.oracle.com/technetwork/java/javase/compatibility-417013.html

Oracle Java SE Support Roadmap
http://www.oracle.com/technetwork/java/eol-135779.html

Java SE 7 End of Public Updates Notice
https://java.com/en/download/faq/java_7.xml

Incompatibilities in the Java Platform, Standard Edition 6   (since J2SE 5.0)
http://www.oracle.com/technetwork/java/javase/compatibility-137541.html#incompatibilities

Incompatibilities in the Java 2 Platform, Standard Edition, v1.4.2   (since 1.4.1)
http://www.oracle.com/technetwork/java/javase/compatibility-142878.html#incompatibilities

Incompatibilities in J2SE 1.4.1   (since 1.4.0)
http://www.oracle.com/technetwork/java/javase/compatibility-j2se1-140308.html

Incompatibilities in J2SE 1.4.0   (since 1.3)
http://www.oracle.com/technetwork/java/javase/compatibility-j2se1-141394.html

Incompatibilities in J2SE 1.3   (since 1.2)
http://www.oracle.com/technetwork/java/javase/compatibility-135119.html

Is your project ready for Java 7?
http://vyazelenko.com/2012/02/01/is-your-project-ready-for-java-7/

Is JDK “upward” or “backward” compatible?
http://stackoverflow.com/questions/4692626/is-jdk-upward-or-backward-compatible


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