ToString() and new String(),which is the better?

now,there is very big StringBuffer sb,i want convert it to String s,which is the better:
s=sb.toString();
s=new String(sb);
Thanks.

now,there is very big StringBuffer sb,i want convert
it to String s,which is the better:
s=sb.toString();
s=new String(sb);
Thanks.this is the implementation advice for
toString(StringBuffer)
This method can be coded so as to create a new String object
without allocating new memory to hold a copy of the character sequence. Instead, the string
can share the memory used by the string buffer. Any subsequent operation that alters the
content or capacity of the string buffer must then make a copy of the internal buffer at that
time. This strategy is effective for reducing the amount of memory allocated by a string
concatenation operation when it is implemented using a string buffer.
so decide urself
regards
robert

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<Edited by Host>

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