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StringBuffer capacity

 
Vicken Karaoghlanian
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1) on line 2, a string buffer (s) of capacity 16 + 5 = 21 is created.
2) on line 3, we appended ss to s making 16 + 5 = 21, which fits perfectly in s, making the output on line 4 equals to 21.
my question is: if we add another character to ss

the output (capcity) of s becomes 44 !!! isn't suppose that the capacity increases by one, hence becoming 22??
 
Miki Muzsi
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when using append() for a StringBuffer, the ensureCapacity() method is implicitly called. See JLS1 - StringBuffer
Miki
 
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