Early Access b93 is available for JDK 9 on java.net

Rory O'Donnell rory.odonnell at oracle.com
Fri Nov 27 12:24:14 UTC 2015

Hi All,

Since my last message about JDK 9 build b88, a number of new JEPs have 
been integrated into JDK 9 b93
available here <https://jdk9.java.net/download/>. I'd like to point you 
to a few that are now available for testing in this JDK 9 Early Access 

JEP 254: Compact Strings (http://openjdk.java.net/jeps/254)

This JEP adopts a more space-efficient internal representation for strings.

We propose to change the internal representation of the String class 
from a UTF-16 char array to a byte array plus an encoding-flag field. 
The new String class will store characters encoded either as 
ISO-8859-1/Latin-1 (one byte per character), or as UTF-16 (two bytes per 
character), based upon the contents of the string. The encoding flag 
will indicate which encoding is used.

JEP 165: Compiler Control (http://openjdk.java.net/jeps/165)

This JEP proposes an improved way to control the JVM compilers. It 
enables runtime manageable, method dependent compiler flags. (Immutable 
for the duration of a compilation.)

Method-context dependent control of the compilation process is a 
powerful tool for writing small contained JVM compiler tests that can be 
run without restarting the entire JVM. It is also very useful for 
creating workarounds for bugs in the JVM compilers.

JEP 243: Java-Level JVM Compiler Interface 

This JEP instruments the data flows within the JVM which are used by the 
JIT compiler to allow Java code to observe, query, and affect the JVM's 
compilation process and its associated metadata.

JEP 268: XML Catalog API (http://openjdk.java.net/jeps/268)

This JEP develops a standard XML Catalog API that supports the OASIS XML 
Catalogs standard, v1.1. The API will define catalog and 
catalog-resolver abstractions which can be used with the JAXP processors 
that accept resolvers.

Existing libraries or applications that use the internal API will need 
to migrate to the new API in order to take advantage of the new features.

Rgds, Rory

Rgds,Rory O'Donnell
Quality Engineering Manager
Oracle EMEA , Dublin, Ireland

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.openjdk.java.net/pipermail/quality-discuss/attachments/20151127/355b0470/attachment.html>

More information about the quality-discuss mailing list