java - Why is it possible to use these abstract methods? -

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consider code page saving key - value sets

sharedpreferences sharedpref = getactivity().getpreferences(context.mode_private); sharedpreferences.editor editor = sharedpref.edit(); editor.putint(getstring(r.string.saved_high_score), newhighscore); editor.commit();

why possibile use putint() method without providing implementation since it's abstract method? (see: sharedpreferences.editor) shouldn't impossible do? kindly explain this? thanks.

why possibile use putint() method without providing implementation since it's abstract method?

editor instance of internal class implements sharedpreferences.editor interface. likely, instance of sharedpreferencesimpl.editorimpl.


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