Why cant instance variables be abstract, synchronized, strictfp and native ?

[Sumeet H Singh]

Hi all,
Can anyone explain why cant we use these modifiers with instance variables? (for each of these modifiers)

Regards,
Sumeet

[Campbell Ritchie]

The modifier abstract means something is missing; what can be missing from a variable?
The modifier synchronized means the block of code is under a lock; how can a variable be under a lock?
The modifier strictfp means extended floating-point arithmetic is prohibited; how can there be floating point arithmetic in a variable?
The modifier native means the block of code is written in C/C++; how can a variable be written in C/C++?