question: void replace ( int offset , int length , char [ ] replArray , int replOffset , int replLength ) { int delta = replLength - length ; int src = offset + length ; int nmove = count - src ; int dest = src + delta ; if ( ( count + delta ) >= data . length ) { int newLength = Math . max ( 2 * data . length , count + delta ) ; char [ ] newData = new char [ newLength ] ; System . arraycopy ( data , 0 , newData , 0 , offset ) ; System . arraycopy ( replArray , replOffset , newData , offset , replLength ) ; System . arraycopy ( data , src , newData , dest , nmove ) ; data = newData ; } else { System . arraycopy ( data , src , data , dest , nmove ) ; System . arraycopy ( replArray , replOffset , data , offset , replLength ) ; } count = count + delta ; }
target:  Replaces some of the characters in the array