java将一个list转成指定数据类型的数组

private static final List<Integer> list = Lists.newArrayList();
static {
    list.add(1); 
    list.add(2);
}

public static void testListToArray() {
    Integer[] integer = new Integer[list.size()]; 
    list.toArray(integer); 
    System.out.println("1:"+integer[0] + ",2:" + integer[1]);
}

public static void main(String[] args) {
   testListToArray();
}