Parameters:
a - the array to be filled.
fromIndex - the index of the first element (inclusive) to be filled with the specified value.
toIndex - the index of the last element (exclusive) to be filled with the specified value.
val - the value to be stored in all elements of the array.
static void fill(byte[] a, int fromIndex, int toIndex, byte val)
Assigns the specified byte value to each element of the specified range of the specified array of bytes.