question: @ Override public void write ( char c [ ] , int off , int len ) { if ( ( off < 0 ) || ( off > c . length ) || ( len < 0 ) || ( ( off + len ) > c . length ) || ( ( off + len ) < 0 ) ) { throw new IndexOutOfBoundsException ( ) ; } else if ( len == 0 ) { return ; } int newcount = count + len ; if ( newcount > buf . length ) { buf = Arrays . copyOf ( buf , Math . max ( buf . length << 1 , newcount ) ) ; } System . arraycopy ( c , off , buf , count , len ) ; count = newcount ; }
target:  Writes characters to the buffer.