java - I'm confused about the basics of pointers/references -

given this:

int = 10; int b = a; a++; 

is b = 10 or 11? if 10, why happen (i'm using android example):

textview x = new textview(); textview y = x; x.settext("abcde"); 

which leads y's text being set "abcde", doesn't it?

edit:

what if use 'integer' instead of 'int'? b = 11?

an int primitive, a , b don't refer object, hold value. therefore assignment int b = a; copies original value of a b , a++ modifies a.

with reference types, behavior different, shown in textview snippet. x , y refer same textview instance (object), x.settext("abcde") modifies single instance referred both.