How to jump to java source file from inside of xml file?

IDEA will allow such in places where it knows the value it is dealing with is a class name. For example in web.xml and spring config files. For places where it does not, such as your example, you can do the following:

1. Either:
   1. Place your cursor on the simple Classname and Type Ctrl+W once to select the class name
   2. Place your cursor anywhere in the fully qualified class name and type Ctrl+W twice to select the fully qualified classname
2. Type Ctrl+N (Navigate to class)
   • The dialog will pre-populate with the class name selected
3. Type enter or select the appropriate class and type enter.

If desired, you can record a macro (Edit > Macros) and map it to a short cut (File > Settings > [IDE Settings] > Keymap > [Macros]). If recording a macro, do the version which types Ctrl+W twice so it works regardless of where you are in the name (and it is more accurate since ti finds the fully qualified classname).