java runtime type 问题求解

Question

public class SystemTest {

public static void main(String[] args) {
    List<Integer> list=new ArrayList<Integer>();
    list.add(0);list.add(1);list.add(2);
    Integer[] in=new Integer[5];
    System.arraycopy(list, 0,in, 0, list.size());
    System.out.println(in);
}

}

Answer 1

已解决
public static native void arraycopy(Object src, int srcPos,
Object dest, int destPos,
int length);
事实上object只能是数组，
public static native void arraycopy(Object[] src, int srcPos,
Object[] dest, int destPos,
int length);