Accessing static SharedPreference variable directly VS through Getter function

问题

I have static DefaultSharedPreference variable defined as like here:

public class Itu extends Application {
    public static SharedPreferences sharedPreferencesFDefault;

    @Override
    public void onCreate() {
        sharedPreferencesFDefault = PreferenceManager.getDefaultSharedPreferences(this); 
    }
    public static SharedPreferences getSharedPreferencesItu(){
        return sharedPreferencesFDefault;
    }
}

(1. way) When i access it directly from some Activity, it clears sharedPreference:

((Itu) getApplication()).sharedPreferencesFDefault.edit().clear().commit();

(2. way) But when i access it through Getter method and try to clear() it, it does NOT work:

public static SharedPreferences sharedPreferencesFDefault;
sharedPreferencesFDefault = ((Itu) getApplication()).getSharedPreferencesItu();
sharedPreferencesFDefault.edit().clear().commit();

Old question: What is the difference between 1.way and 2.way?

UPDATE: I changed public static SharedPreferences sharedPreferencesFDefault to public SharedPreferences sharedPreferencesFDefault and both ways worked.

New question: What happens when i initialize static variable with another static variable indeed?

来源：https://stackoverflow.com/questions/29605084/accessing-static-sharedpreference-variable-directly-vs-through-getter-function