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Date: Tue, 28 Jun 2011 11:42:57 -0700
From: Patricia Shanahan <pats@acm.org>
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Subject: Re: Why "lock" functionality is introduced for all the objects?
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On 6/28/2011 11:23 AM, 
supercalifragilisticexpialadiamaticonormalizeringelimatisticantations wrote:
...
> plus object headers) to short strings (two bytes per character plus four
> for the length field = 8 for a two-letter word and 4 for an empty string
...

Each String instance has the following fields:

private final char value[];
private final int offset;
private final int count;
private int hash;

There are 12 bytes in addition to the char array. The offset and count
fields allow quick sub-string construction, and hash is used to cache
the hashCode result.

Patricia