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Andreas Fester
Works at Oracle Corporation
Attended Karlsruhe University of Applied Sciences
Lives in Karlsruhe
118 followers|155,231 views
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Andreas Fester

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Error message from MS #Windows  when trying to copy a .zip file to an #Android  smartphone through #usb :
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Andreas Fester

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Great article by +Lukas Eder: https://blog.jooq.org/2016/04/25/10-sql-tricks-that-you-didnt-think-were-possible. Read it and learn about SQL keywords you could not even imagine they exist ...
Listicles like these do work – not only do they attract attention, if the content is also valuable (and in this case it is, trust me), the article format can be extremely entertaining. This a…
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"Secure Coding Guidelines for Java SE" (http://www.oracle.com/technetwork/java/seccodeguide-139067.html). Recommended reading for all #java  developers.
This web page contains Secure Coding Guidelines for the Java Programming Language
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Not every "$" class file synthesized by the #java  compiler is necessarily resulting from an anonymous inner class. A probably less obvious reason for the compiler to synthesize such helper classes is when using "switch" on enum values:
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Andreas Fester

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I am saddened beyond words to hear of the death of Ian Murdock. Ian was the founder of Debian and the first secretary of the Open Source Initiative, among many other things. I got to know him when we both worked at Sun Microsystems and found him a brilliant man, capable of insight and charm.

Many of us were exceptionally concerned by his tweets on Monday reporting he had been brutalised by the police and saying his career was ruined. I am sure there is much to learn and tell, but the post by his current employer (Docker) rightly asks that we respect his family's grief  so I suggest avoiding speculation here.

Goodbye, brilliant friend.
Dear friends and members of the open source community, It is with great sadness that we inform you that Ian Murdock passed away on Monday night. This is a tragic loss for his family, for the Docker…
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Interesting learning: It is possible to use 32 bit references in a 64 bit #java  JVM. This can be useful if you must use a 64 bit JVM (e.g. if native libraries are only available as 64 bit libraries), but your actual java application would also run fine with a 32 bit JVM. http://stackoverflow.com/a/4407928/1611055
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Andreas Fester

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JEP 223: New Version-String Scheme for #java  releases (http://openjdk.java.net/jeps/223). Would make it much easier to understand the JDK's/JRE's version numbers ...
Authors, Iris Clark, Mark Reinhold. Owner, Iris Clark. Created, 2014/10/20 18:27. Updated, 2015/11/25 17:40. Type, Feature. Status, Targeted. Scope, SE. Discussion, verona dash dev at openjdk dot java dot net. Effort, M. Duration, M. Priority, 1. Reviewed by, Brian Goetz, Roger Riggs ...
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Andreas Fester

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In recent times, there have been a couple of tremendously popular blog posts explaining JOINs using Venn Diagrams. After all, relational algebra and SQL are set oriented theories and languages, so it only makes sense to illustrate set operations like…
In recent times, there have been a couple of tremendously popular blog posts explaining JOINs using Venn Diagrams. After all, relational algebra and SQL are set oriented theories and languages, so …
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Simple Tip to open ADF pages/Page-fragments directly in source mode.
Problem description: When we try to open a jspx/jsff file it opens up in design mode and generally it takes long time to show page. Most of the time we directly want to see page in source mode. Here I am just showing to simpl...
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Andreas Fester

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Not every "$" class file synthesized by the #java  compiler is necessarily resulting from an anonymous inner class. A probably less obvious reason for the compiler to synthesize such helper classes is when using "switch" on enum values:
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Not pretty. However the bigger problem is not the obvious one. There will be patches very soon for all the usual Linux platforms (or roll your own RPM it's not hard). However guess what many of those cheap GPL violating no source code ADSL routers that never get firmware upgrades run for their own internal use and to masquerade DNS.

Oh dear..

And that is why source code to your infrastructure is so important. This bug just obsoleted a pile of low end crapware router and firewall boxes holding homes, businesses and government together.

You can upgrade all your servers but if that little cheapo plastic box on your network somewhere has a vulnerable post 2008 glibc and ever does DNS lookups chances are it's the equivalent of a trapdoor into your network.

Even more fun of course - some of them regularly do poll some hardcoded DNS address so if anyone takes over that DNS record and starts serving a suitably compromised record back ...

https://googleonlinesecurity.blogspot.co.uk/2016/02/cve-2015-7547-glibc-getaddrinfo-stack.html
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Andreas Fester

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Interesting learning: It is possible to use 32 bit references in a 64 bit #java  JVM. This can be useful if you must use a 64 bit JVM (e.g. if native libraries are only available as 64 bit libraries), but your actual java application would also run fine with a 32 bit JVM. http://stackoverflow.com/a/4407928/1611055
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This does not make sence at all. As a java programmer you do not write code for the architecture of the cpu. The only way to reduce the memory footprint is write good code. There are good books about this topic e.g. Efficient Java.
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Have him in circles
118 people
omar abdellah's profile photo
Marco Ertel's profile photo
Bảo Duy Dương's profile photo
kaurana aldebaran's profile photo
saravanakumar sankar's profile photo
familienfreund KG's profile photo
Russel Jung's profile photo
Logic Heart's profile photo
Pabbathi lakshmi devi's profile photo
Communities
26 communities
Education
  • Karlsruhe University of Applied Sciences
    Computer Science, 1993 - 1999
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Explore. Explain. Elaborate.
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  • Oracle Corporation
    2007 - present
  • Agile
    2003 - 2007
  • Eigner
    1999 - 2003
  • SEP Systeme AG
    1996 - 1997
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