EclipseStuff

From TechWiki

Installing instructions for Eclipse here...

Contents

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Remote Debugging

Attach to a remote process and debug it like a local application...

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Argument

The arguments to add to the JVM when running your program is: 

-Xdebug -Xrunjdwp:transport=dt_socket,address=1044,server=y,suspend=n

You might have to change the port from 1044 to something else if this is already used.

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Attach Eclipse

In the debug window, between Java Application and SWT Application, there is a Remote Java Application, right click and select a new profile.

Select the project, the host your program is running on and the port you choose when you started your program.

Then click Debug to connect to your program.

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Creating JAR files

Right click on your project in the Package Explorer and select Export. Choose the JAR option and select the project and resources you want to pack int to the JAR.

To run the JAR file from a terminal, see Java Stuff.

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Configure KDE Panel Button

If you wan to add a button that runs Eclipse to your KDE panel, you need to set some environment stuff right. To start 

Right-click panel and choose Add Application to Panel

then 

Add Non-KDE Application

and edit the Executable: line to something like this: 

export PATH="/usr/local/lib:/bin:/usr/bin:/usr/X11R6/bin:/usr/local/bin"; /usr/local/eclipse -data /home/work/ –Xmx2048M

You find the eclipse icon in System Icons, Applications.

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Launch Configuration

Eclipse saves the launch configurations under 

.metadata/.plugins/org.eclipse.debug.core/.launches/

and the history under 

.metadata/.plugins/org.eclipse.debug.ui/launchConfigurationHistory.xml
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Problems

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Speed

And suddenly, Eclipse is really, really slow...

Before you spend ages profiling and stuff, try 

deleting all break points and watch expressions.

Can already help get you back the speeds you were accustomed to...

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Project is Missing Required Java Project

And suddenly your projects all have errors after restarting eclipse. The culprit is 

Eclipse error: Project 'X' is missing required Java project: 'Y'

But project 'Y' is there :-/

Solution: 

open Java Build Path -> Order and Export and delete project 'Y' from the list
clean everything
add project 'Y' back to the list
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Opening Editor is Slow

Sometimes eclipse running on jaunty and older versions of (x/k)ubuntu is very slow to open new editor windows. This has somehow something to do with printer lists being loaded every time.

Solution: 

upgrade to eclipse35 galileo

where they fixed this bug.

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Eclipse Unusably Slow

When starting up, eclipse complains about not being compatible with the gnome java version. Why the hell it defaulted to that is another question:-/

Solution: 

go to the eclipse directory and ad a symbolic link called jre to the right java version

e.g., 

cd ./eclipse
ln -s [path]/jdk1.6.0_12/ jre
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Subclipse Corruption

Sometimes eclipse corrupts svn when upgrading.

Solution: 

open terminal and go to directory of the offending project
execute: svn update
go the the project in the eclipse IDE and refresh

This should solve the problem and not have lost any current local modifications.

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Eclipse Gone Mad

If you get bizarre exceptions like 

java.lang.NoClassDefFoundError: Could not initialize class ...

although eclipse should be able to see the class, then, sometimes, you can be lucky if you force a rebuild.

To really force eclipse to do this: 

Window -> Preferences -> Java -> Installed JREs -> and add a different JRE which you select

Thanks Vito for the tip...

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