[Java] Copy array to array (without loop)

1. arraycopy () specifies the copy length and starting position
   System.arraycopy (dataType [] srcArray, int srcIndex, int destArray, int destIndex, int length) The
   target array must exist

2. clone ()
   array_name.clone () The
   return value is object, so it is necessary to perform type conversion

3. copyOf () specifies the length
   Arrays.copyOf (dataType [] srcArray, int length); the
   default starts from 0, and length is the length of the new array

4. copyOfRange specifies the starting and ending points
   Arrays.copyOfRange (dataType [] srcArray, int startIndex, int endIndex)

Except that the first one is a replacement, the rest is reconstructed if the target array exists

Refer