public Writer append (CharSequence csq, int start, int end) throws IOException

Implementing: java.lang.Appendable

Appends a subsequence of the specified character sequence to this writer. Appendable.

An invocation of this method of the form out.append(csq, start, end) when csq is not null behaves in exactly the same way as the invocation

     out.write(csq.subSequence(start, end).toString())
 

Returns:  This writer

Since:  1.5