Oracle Java Armhf

Posted by sky | Tags: Android, Java, Linux, Open-Source, Personal, armhf, testing

Oracle has released a armhf-based developer Preview of JDK 8 with JavaFX.

Although this release does not support Java API that requires X11, such as AWT and Swing, we can use the Client Hotspot (jre/lib/arm/client/libjvm.so) from the JavaFX 8 preview in combination with the compiled OpenJDK 7 Runtime environment classes to run Swing/AWT programs. ( see Raspberry PI discussion thread )

Copy the client hotspot dir containing the libjvm.so into the OpenJDK 7 jre/lib/arm folder (copy to oracle).and configure the OpenJDK Runtime to use the Oracle client Hotspot JVM dir by adding the line -oracle KNOWN as the first option in the /etc/java-7-openjdk/jvm-armhf.cfg

1     # apt-get install openjdk-7-jre
2     # tar --extract --verbose --file=jdk-8-ea-b36e-linux-arm-hflt-29_nov_2012.tar.gz jdk1.8.0/jre/lib/arm/client
3     # cp -r jdk1.8.0/jre/lib/arm/client /usr/lib/jvm/java-7-openjdk-armhf/jre/lib/arm/oracle
4     

/etc/java-7-openjdk/jvm-armhf.cfg

1     #
2     -oracle KNOWN
3     -server KNOWN
4     

Java code runs much faster with the Oracle JVM.

18 May 2013

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