- csq
- the character sequence to append.
- start
- the first index of the subsequence of csq that is appended.
- end
- the last index of the subsequence of csq that is appended.
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Type Reason Java.Lang.IndexOutOfBoundsException if start , end , start > end or end is greater than the length of csq. Java.IO.IOException if an I/O error occurs.
Appends a subsequence of csq.
If csq is not null then calling this method is equivalent to calling append(csq.subSequence(start, end)).
If csq is null, the characters "null" are appended.