How to write the contents of string buffer to a file

hi all
how is it possible to write the contents of a string buffer to a new file (ie i have to create a file and write in it )
this my string buffer
StringBuffer s=new StringBuffer();
s.append("<html><head><title>Welcome</title>");
s.append("</head>");
s.append("<body>");
s.append("<b> Hello,");
s.append(output);
s.append(" You have been Sucessfully authenticated</b>");
s.append("</body></html>");
so please can anyone help me

for nice examples of how to do things you may look int [url http://javaalmanac.com]Java Almanac
or more specifficly: [url http://javaalmanac.com/egs/java.io/WriteToFile.html?l=find]Writin to a File
in case you don't know how to apply that example on your code, since you have StringBuffer instead of String, then look at [url http://java.sun.com/j2se/1.4.2/docs/api/]API Specification of [url http://java.sun.com/j2se/1.4.2/docs/api/java/lang/StringBuffer.html]StringBuffer, and see if there is some method like toString() or similar, that would help you convert your StringBuffer to a String.

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