Rajendra's Blog

Building OpenJDK with New NIO.2 patch

Source code for NIO.2 is available as a patch. I have applied the NIO.2 patch to the clone of OpenJDK repository and built the OpenJDK source in Solaris-Sparc and Ubuntu 8.04 on x86 machine.

Here are the steps I have followed.

> Install Mercurial 0.9.5 and update hg configuration file ~/.hgrc with forest extension.
> To install forest extension to mercurial

                 > export http_poxy=your proxy
                 > hg clone http://hg.akoha.org/hgforest

set the forest configuration variable to the path of forest.py in extensions section of ~/.hgrc file to enable forest extension

                  [extensions]
                  forest=/home/rajendra/hgforest/forest.py

>clone the jdk7 mercurial repository

                  hg fclone http://hg.openjdk.java.net/jdk7/tl jdk7

> download nio2-b90 patch
> move to folder jdk7/jdk and apply the nio patch with following command

                    patch -p1 < nio2-b90.patch

> follow the instructions for building OpenJDK
Here I executed the sample code DiskUsage.java which exhibits as df utility with the new build as follows.

$ ~/jdk7/build/bin/java -version 
openjdk version "1.7.0-internal"
OpenJDK Runtime Environment (build 1.7.0-internal-b27)
OpenJDK Client VM (build 12.0-b01, mixed mode)
$~/jdk7/mytl/build/bin/java DiskUsage

Filesystem                 kbytes         used        avail
/ (/dev/sda1)           113313700      5238532    102364464
/proc (proc)                    0            0            0
(output discarded)

Try yourself and send feed-back, comments and suggestions to NIO OpenJDK project. I hope you will enjoy.

Posted at 03:34PM May 07, 2008 by Rajendra Gutupalli in Sun  |  Comments[5]