question: public void write ( CharSequence csq ) throws IOException { if ( _outputStream == null ) throw new IOException ( "Writer closed" ) ; final int length = csq . length ( ) ; for ( int i = 0 ; i < length ; ) { char c = csq . charAt ( i ++ ) ; if ( c < 0x80 ) { _bytes [ _index ] = ( byte ) c ; if ( ++ _index >= _bytes . length ) { flushBuffer ( ) ; } } else { write ( c ) ; } } }
target:  Writes the specified character sequence.