| 178 |
|
* @throws NullPointerException if the specified collection is null |
| 179 |
|
*/ |
| 180 |
|
public ArrayList(Collection<? extends E> c) { |
| 181 |
< |
elementData = c.toArray(); |
| 182 |
< |
if ((size = elementData.length) != 0) { |
| 183 |
< |
// defend against c.toArray (incorrectly) not returning Object[] |
| 184 |
< |
// (see e.g. https://bugs.openjdk.java.net/browse/JDK-6260652) |
| 185 |
< |
if (elementData.getClass() != Object[].class) |
| 186 |
< |
elementData = Arrays.copyOf(elementData, size, Object[].class); |
| 181 |
> |
Object[] a = c.toArray(); |
| 182 |
> |
if ((size = a.length) != 0) { |
| 183 |
> |
if (c.getClass() == ArrayList.class) { |
| 184 |
> |
elementData = a; |
| 185 |
> |
} else { |
| 186 |
> |
elementData = Arrays.copyOf(a, size, Object[].class); |
| 187 |
> |
} |
| 188 |
|
} else { |
| 189 |
|
// replace with empty array. |
| 190 |
< |
this.elementData = EMPTY_ELEMENTDATA; |
| 190 |
> |
elementData = EMPTY_ELEMENTDATA; |
| 191 |
|
} |
| 192 |
|
} |
| 193 |
|
|
