[Solved]opening vanilla texture with external editor

[Glistre]

How do you open a vanilla texture through Eclipse?  For example, the texture is located in the forgeSrc .jar and inside is the package assets.minecraft.textures.entity.xyz.png  how would one open this texture and edit it with GIMP or other editor?

 

I went to Window/Preferences/General/Editor  and selected open with external editor and selected GIMP PNG for my external editor, however, when I try to open the texture I get an error "System can only open base file resources"

 

Do you need a plugin or something into Eclipse or is there another way to open the texture?

[Glistre]

Thanks that works perfect!

[Draco18s]

Yeah, I keep a shortcut to the vanilla jar for when I need to go extract some texture and utilize it.