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what is the difference string and stringbuffer?

1 reply on 1 page. Most recent reply: Oct 16, 2002 1:49 AM by Ramzi Ben Yahia

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senthil

Posts: 23
Nickname: rickk84
Registered: Aug, 2002

what is the difference string and stringbuffer? Posted: Oct 15, 2002 4:43 AM
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what is the difference string and stringbuffer?


Ramzi Ben Yahia

Posts: 23
Nickname: miccheck
Registered: Jul, 2002

Re: what is the difference string and stringbuffer? Posted: Oct 16, 2002 1:49 AM
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String instances are immuatable , StringBuffer aren't
in fact when you try something like this

String s = new String();
s = s + "chain";

is as if you've done instead
s = new String(s + "chain");

when you use StringBuffer like this:

StringBuffer buff = new StringBuffer();
buff.append(s).append("chain");
buff will always keep the same reference.

that's why it's recommended to use StringBuffer instead of String when you manipulate String.
for it saves memory and avoid creation of many String instances.

StringTokenizer is also recommended to replace
methods in String class as substring..

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