java - Cast ArrayList of wrappers to corresponding array of primitives

Question

I use an ArrayList with the wrapper class Short.
After adding some values I want to get the primitive array, but it seems that there is no way with the function toArray(Object[] array), because it need an Array with the wrapper class.

Is there another way without using a for or anything like that?

Answer 1

Apache Commons / Lang has a class ArrayUtils that defines these methods.

• All methods called toObject() convert from primitive array to wrapper array.
• All called toPrimitive() convert from wrapper object array to primitive array

I think, you need ArrayUtils's toPrimitive()

public static short[] toPrimitive(Short[] array)

Converts an array of object Shorts to primitives.