Archive for the ‘Java’ Category
Installing Java on Ubuntu
Posted by: Chyne on: November 2, 2009
- In: Java| Linux
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Some commands that you need to know during installing Java on Linux environment:
1) Get the installation package from this command:
sudo apt-get install sun-java-6-jdk
2) Check java version
java -version
3) Check location of installed jdk
sudo update-java-alternatives -l
4)Set default java
sudo update -java-alternatives -s java-6-sun
5) Set JAVA_HOME based on location
export JAVA_HOME=/usr/lib/jvm/java-6-sun
6) Set all the environment path in /etc/environment
JAVA_HOME=/usr/lib/jvm/java
7) Set in [...]
History of JavaScript or How JScript was born?
Posted by: Chyne on: September 2, 2009
- In: Ajax Bible| Java| Others
- 1 Comment
I knew history is quite a boring subject for certain people but few days ago, I just read an interesting history related to JavaScript else I won’t remember the story after several days. Anyway, I try to make it as interesting as possible because I always feel that telling a story is not a difficult [...]
How JVM Crash Looks Like?
Posted by: Chyne on: July 20, 2009
- In: Java
- 2 Comments
How do you know the reported problem it’s a JVM crash and not related to the application itself?
Here are the steps (ranking from lowest to the highest probability) for you to track down and troubleshoot the problem:
1. Application Behaviour
The service terminated unexpectedly or the application suddenly shutdown.
2. JVM version
The installed JVM is in the version [...]
java.io.FileNotFoundException with (Permission Denied)
Posted by: Chyne on: July 13, 2009
- In: Java
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Error exporting data: java.io.FileNotFoundException: /usr/local/temp/backup.zip (Permission denied)
Root Cause
If the log shows the exception ‘FileNotFoundException’ with the ‘Permission Denied’, the main root cause of this error is the file does not being granted for write permission. It means when the user tries to execute an action to write the data into the file and the file [...]
‘Interface was expected’ for JPEGImageEncoder
Posted by: Chyne on: July 12, 2009
- In: Java
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java.lang.IncompatibleClassChangeError: Found class com.sun.image.codec.jpeg.JPEGImageEncoder, but interface was expected
Root Cause
If you found this error appears in the log file, the biggest possibility and maybe the only reason that this exception being thrown is you are using the OpenJDK instead of Sun JDK. Well, the exception message is obvious to tell you that the com.sun.image.codec.jpeg.JPEGImageEncoder is a [...]
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