| 53 |
|
* |
| 54 |
|
* @author Josh Bloch and Doug Lea |
| 55 |
|
* @since 1.6 |
| 56 |
< |
* @param <E> the type of elements held in this collection |
| 56 |
> |
* @param <E> the type of elements held in this deque |
| 57 |
|
*/ |
| 58 |
|
public class ArrayDeque<E> extends AbstractCollection<E> |
| 59 |
|
implements Deque<E>, Cloneable, Serializable |
| 315 |
|
* @return {@code true} if the deque contained the specified element |
| 316 |
|
*/ |
| 317 |
|
public boolean removeFirstOccurrence(Object o) { |
| 318 |
< |
if (o == null) |
| 319 |
< |
return false; |
| 320 |
< |
int mask = elements.length - 1; |
| 321 |
< |
int i = head; |
| 322 |
< |
Object x; |
| 323 |
< |
while ( (x = elements[i]) != null) { |
| 324 |
< |
if (o.equals(x)) { |
| 325 |
< |
delete(i); |
| 326 |
< |
return true; |
| 318 |
> |
if (o != null) { |
| 319 |
> |
int mask = elements.length - 1; |
| 320 |
> |
int i = head; |
| 321 |
> |
for (Object x; (x = elements[i]) != null; i = (i + 1) & mask) { |
| 322 |
> |
if (o.equals(x)) { |
| 323 |
> |
delete(i); |
| 324 |
> |
return true; |
| 325 |
> |
} |
| 326 |
|
} |
| 328 |
– |
i = (i + 1) & mask; |
| 327 |
|
} |
| 328 |
|
return false; |
| 329 |
|
} |
| 341 |
|
* @return {@code true} if the deque contained the specified element |
| 342 |
|
*/ |
| 343 |
|
public boolean removeLastOccurrence(Object o) { |
| 344 |
< |
if (o == null) |
| 345 |
< |
return false; |
| 346 |
< |
int mask = elements.length - 1; |
| 347 |
< |
int i = (tail - 1) & mask; |
| 348 |
< |
Object x; |
| 349 |
< |
while ( (x = elements[i]) != null) { |
| 350 |
< |
if (o.equals(x)) { |
| 351 |
< |
delete(i); |
| 354 |
< |
return true; |
| 344 |
> |
if (o != null) { |
| 345 |
> |
int mask = elements.length - 1; |
| 346 |
> |
int i = (tail - 1) & mask; |
| 347 |
> |
for (Object x; (x = elements[i]) != null; i = (i - 1) & mask) { |
| 348 |
> |
if (o.equals(x)) { |
| 349 |
> |
delete(i); |
| 350 |
> |
return true; |
| 351 |
> |
} |
| 352 |
|
} |
| 356 |
– |
i = (i - 1) & mask; |
| 353 |
|
} |
| 354 |
|
return false; |
| 355 |
|
} |
| 654 |
|
* @return {@code true} if this deque contains the specified element |
| 655 |
|
*/ |
| 656 |
|
public boolean contains(Object o) { |
| 657 |
< |
if (o == null) |
| 658 |
< |
return false; |
| 659 |
< |
int mask = elements.length - 1; |
| 660 |
< |
int i = head; |
| 661 |
< |
Object x; |
| 662 |
< |
while ( (x = elements[i]) != null) { |
| 663 |
< |
if (o.equals(x)) |
| 668 |
< |
return true; |
| 669 |
< |
i = (i + 1) & mask; |
| 657 |
> |
if (o != null) { |
| 658 |
> |
int mask = elements.length - 1; |
| 659 |
> |
int i = head; |
| 660 |
> |
for (Object x; (x = elements[i]) != null; i = (i + 1) & mask) { |
| 661 |
> |
if (o.equals(x)) |
| 662 |
> |
return true; |
| 663 |
> |
} |
| 664 |
|
} |
| 665 |
|
return false; |
| 666 |
|
} |
| 804 |
|
/** |
| 805 |
|
* Saves this deque to a stream (that is, serializes it). |
| 806 |
|
* |
| 807 |
+ |
* @param s the stream |
| 808 |
+ |
* @throws java.io.IOException if an I/O error occurs |
| 809 |
|
* @serialData The current size ({@code int}) of the deque, |
| 810 |
|
* followed by all of its elements (each an object reference) in |
| 811 |
|
* first-to-last order. |
| 825 |
|
|
| 826 |
|
/** |
| 827 |
|
* Reconstitutes this deque from a stream (that is, deserializes it). |
| 828 |
+ |
* @param s the stream |
| 829 |
+ |
* @throws ClassNotFoundException if the class of a serialized object |
| 830 |
+ |
* could not be found |
| 831 |
+ |
* @throws java.io.IOException if an I/O error occurs |
| 832 |
|
*/ |
| 833 |
|
private void readObject(java.io.ObjectInputStream s) |
| 834 |
|
throws java.io.IOException, ClassNotFoundException { |
