How to get the source code of Fiji?

I am a user of Fiji. Currently, I am facing a problem with obtaining the source code of Fiji.

I used git GUI to get the source code from:
And then used eclipse to run the project: File->Import->Maven->Existing Maven Projects

After running the project, I got an error as follows:
[ECLIPSE HELPER] Indexing annotations…
[ERROR] Cannot create plugin: class=‘’, name=‘Fiji’, priority=0.0, enabled=true, pluginType=App
org.scijava.InstantiableException: Class not found:
at org.scijava.plugin.PluginInfo.loadClass(
at org.scijava.plugin.PluginInfo.createInstance(