Recently I couldn’t start the x server and I got a mysterious Invalid MIT-MAGIC-COOKIE-1 key error. I deleted the .Xauthority files in my home directory which fixed my problem.
rm ~/.Xauthority*
To install the Next-Generation Java plugin in firefox follow the instructions below which is a summary of this article. If you have been using the classic plugin, see the Notes for further information.
ln -s ${JRE_HOME}/lib/i386/libnpjp2.so
ln -s ${JAVA_HOME}/jre/lib/i386/libnpjp2.sodepending on what environment variable you have set. If you don’t know where your java is located find it out with which java or locate java
Oracle claims that
JavaFX applications will run on any desktop and browser that runs the Java Runtime Environment …
but if I try to run it with my jre I get this error:
java de.slopjong.App
Exception in thread "main" java.lang.NoClassDefFoundError: com/sun/javafx/runtime/FXObject
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClassCond(ClassLoader.java:632)
at java.lang.ClassLoader.defineClass(ClassLoader.java:616)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:283)
at java.net.URLClassLoader.access$000(URLClassLoader.java:58)
at java.net.URLClassLoader$1.run(URLClassLoader.java:197)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
Caused by: java.lang.ClassNotFoundException: com.sun.javafx.runtime.FXObject
at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
... 12 more
Could not find the main class: de.slopjong.App. Program will exit.
If I’m not wrong this means that a JavaFX application requires more than just the Java Runtime Environment. Somewhere else in the JavaFX documentation I read that it’s compiled into java byte-code but this seems to be not the whole story. I understood this as you can run a JavaFX application with your standard jre.
Why should I use JavaFX for graphical user interfaces if the users must have the JavaFX libraries on their computer? I don’t want to force them to install one more piece of junk!
I read a lot of Maven documentation and at the end the most interesting question “How do I run an application with its dependencies?” wasn’t answered. Instead I was flooded with many xml configuration sections without showing a simple and complete configuration file. That’s why I wrote this howto but first a little story.
I came across Ivy and Maven a couple of days ago, both of which make it very easy to add a list of libraries to your Java project and add them to the classpath.
Basically both look for a project configuration file including your dependency list and they download the libraries from the internet and install them in the local repository ~/.ivy2 for Ivy and ~/.m2/repository for Maven which are then shared with your Ivy/Maven projects.
While Ivy is only a dependency manager which is integrated with the most popular build management system for Java projects (Ant), Maven is more than just such a manager. With Maven you have a build system and a dependency manager in one tool.
I focused on Maven and it took me a while to find out that a feature I was looking for wasn’t there natively. I assumed it would have a similar behaviour than Ivy but it hasn’t and works completely different.
I was missing a clear Maven howto which shows in 5 minutes how your project is created, compiled, packaged and especially how your standard java application is run afterwards.
I assume that Maven is already installed and that you are familiar with using a shell as I won’t use m2eclipse, the Maven integration for Eclipse. Maybe I’ll update this post later and give you a little introduction but for now let’s concentrate on using it in a shell.
I don’t guarantee that everything is 100% correct because I don’t use Maven that long. Post a comment if something is wrong.
Note
I’m in the process of forking Erviz. The fork is almost done. The Linux packages are prepared and almost ready to be submitted. (27. Sep 03:47 UTC)
————————
Erviz, written by Mitsuru Kono, is a tool that makes it easy to create entity-relation models and the best thing it’s free!
You can run it on Windows, Linux and Mac but for the latter a patch is required which will be discussed later on this page.
Only these two steps have to be followed:
# Using Erviz 1.0.6
{title: "Syn2Stock ERD V3"; title-size: 20}
# Entities
[Item] {color:red}
*Item ID
Type
SimpleItem
Bar Code
Name
Amount
Owner
Comment
Attachments
Sources
Source ID*
Location ID*
Lending ID*
[Source]
*Source ID
Price
Homepage
Manufacturer
[Location]
*Location ID
GPS Coordinates
Name
Room
Locker
[Lending]
*Lending ID
Borrowed by
Borrowed on
Returned on
Reminder ID*
[Reminder]
*Reminder ID
Start Date
Repeat Interval
End Date
Active
Action
Email
Phone
Message
Item ID*
Lending ID*
[Event]
*Event ID
Event Type
Date
User
Item ID*
[Attachment]
*Attachment ID
File
External URL
Private
[Electronic Part] {color:orange}
*Electronic Part ID
Value
Item ID*
[Book] {color:orange}
*Book ID
Subtitle
Author
Publisher
Paperback
Language
Review
Summary
About the Author
Item ID*
# Relationships
[Item] *--* [Source]
[Item] 1--1 [Location]
[Item] 1--* [Lending]
[Item] *--* [Attachment]
[Reminder] ---- [Item]
[Event] *--1 [Item] <contains ->
[Electronic Part] ---- [Item] <is a->
[Book] ---- [Item] </is><is a->
</is></contains>
