You can customize them: Window -> Preferences -> General -> Editors -> File Associations
There, you'll have to either select a file extension,
or add one to the list and choose what editor eclipse should use
to open it with whenever it's needed.
Domanda
Eclipse hangs when working with XML's ..
the default editor is too slow and gives lot problem
I read, it works fine if we change the editor so how to remove existing editor ??
Soluzione
You can customize them: Window -> Preferences -> General -> Editors -> File Associations
There, you'll have to either select a file extension,
or add one to the list and choose what editor eclipse should use
to open it with whenever it's needed.
Altri suggerimenti
To just open the file once,
Right Click - Open With
To change association,
Windows - Preferences - General - Editors - File Associations