Method arraycopy

lib/java/lang/System.java:39–59

Copies the number of length elements of the Array src starting at the offset srcPos into the Array dest at the position destPos. @param src the source array to copy the content. @param srcPos the starting index of the content in {@code s

(Object src, int srcPos, Object dest, int destPos,
            int length)

     *            to be copied.
     */
    public static void arraycopy(Object src, int srcPos, Object dest, int destPos,
            int length) {
        // sending getClass() to both arguments will check for null
        Class<?> type1 = src.getClass();
        Class<?> type2 = dest.getClass();
        if (!type1.isArray() || !type2.isArray()) {
            throw new ArrayStoreException();
        }
        Class<?> componentType1 = type1.getComponentType();
        Class<?> componentType2 = type2.getComponentType();
        if (!componentType1.isPrimitive()) {
            if (componentType2.isPrimitive()) {
                throw new ArrayStoreException();
            }
        } else {
            if (componentType2 != componentType1) {
                throw new ArrayStoreException();
            }
		}
		arraycopyImpl(src, srcPos, dest, destPos, length);
    }

    public static native void arraycopyImpl(Object src, int srcPos, Object dest, int destPos,
            int length);