Comment 9 for bug 376098

The tip on the following page helped me solving the problem
http://forum.ubuntu-fr.org/viewtopic.php?id=400480
Shortly:

1) Change in 'src/utils/GtkStockIconSWT.java' in the lines 120, 121 et 128 (Integer) by (Long).

2) Then recompile
cd src
javac -classpath ../lib/in_use/metadata-extractor.jar:../lib/in_use/swt.jar @classes

3) I had to replace the swt jar in /lib/in_use/ with the 64 bit version (which I took from here : http://archive.eclipse.org/eclipse/downloads/drops/R-3.6.1-201009090800/index.php#SWT and then Linux (x86_64/GTK 2) )
(This was not said in the referred forum, perhaps this is not needed for everyone)

4) execute
java -classpath ../lib/in_use/metadata-extractor.jar:../lib/in_use/swt.jar:. core.Loader
?field.comment=The tip on the following page helped me solving the problem
http://forum.ubuntu-fr.org/viewtopic.php?id=400480
Shortly:

1) Change in 'src/utils/GtkStockIconSWT.java' in the lines 120, 121 et 128 (Integer) by (Long).

2) Then recompile
cd src
javac -classpath ../lib/in_use/metadata-extractor.jar:../lib/in_use/swt.jar @classes

3) I had to replace the swt jar in /lib/in_use/ with the 64 bit version (which I took from here : http://archive.eclipse.org/eclipse/downloads/drops/R-3.6.1-201009090800/index.php#SWT and then Linux (x86_64/GTK 2) )
(This was not said in the referred forum, perhaps this is not needed for everyone)

4) execute
java -classpath ../lib/in_use/metadata-extractor.jar:../lib/in_use/swt.jar:. core.Loader