[ViewVC] Diff of: jsr166/jsr166/src/main/java/util/PriorityQueue.java

Comparing jsr166/src/main/java/util/PriorityQueue.java (file contents):
Revision 1.21 by dholmes, Tue Aug 5 06:49:51 2003 UTC vs.
Revision 1.40 by dl, Fri Sep 12 15:38:26 2003 UTC

#	Line 1 \| Line 1
1	<	package java.util;
1	>	/*
2	>	* %W% %E%
3	>	*
4	>	* Copyright 2003 Sun Microsystems, Inc. All rights reserved.
5	>	* SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
6	>	*/
7	>
8	>	package java.util;
9
10		/**
11	<	* An unbounded priority queue based on a priority heap. This queue orders
12	<	* elements according to an order specified at construction time, which is
13	<	* specified in the same manner as {@link java.util.TreeSet} and
14	<	* {@link java.util.TreeMap}: elements are ordered
15	<	* either according to their <i>natural order</i> (see {@link Comparable}), or
16	<	* according to a {@link java.util.Comparator}, depending on which
17	<	* constructor is used.
11	>	* An unbounded priority {@linkplain Queue queue} based on a priority heap.
12	>	* This queue orders elements according to an order specified at construction
13	>	* time, which is specified in the same manner as {@link java.util.TreeSet}
14	>	* and {@link java.util.TreeMap}: elements are ordered either according to
15	>	* their <i>natural order</i> (see {@link Comparable}), or according to a
16	>	* {@link java.util.Comparator}, depending on which constructor is used.
17	>	*
18		* <p>The <em>head</em> of this queue is the <em>least</em> element with
19	<	* respect to the specified ordering.
20	<	* If multiple elements are tied for least value, the
21	<	* head is one of those elements. A priority queue does not permit
15	<	* <tt>null</tt> elements.
19	>	* respect to the specified ordering. If multiple elements are tied for least
20	>	* value, the head is one of those elements. A priority queue does not permit
21	>	* <tt>null</tt> elements.
22		*
23		* <p>The {@link #remove()} and {@link #poll()} methods remove and
24		* return the head of the queue.
#	Line 20 \| Line 26
26		* <p>The {@link #element()} and {@link #peek()} methods return, but do
27		* not delete, the head of the queue.
28		*
29	<	* <p>A priority queue has a <i>capacity</i>. The capacity is the
30	<	* size of the array used internally to store the elements on the
31	<	* queue.
32	<	* It is always at least as large as the queue size. As
33	<	* elements are added to a priority queue, its capacity grows
34	<	* automatically. The details of the growth policy are not specified.
29	>	* <p>A priority queue is unbounded, but has a <i>capacity</i>. The
30	>	* capacity is the size of the array used internally to store the
31	>	* elements on the queue. It is always at least as large as the queue
32	>	* size. As elements are added to a priority queue, its capacity
33	>	* grows automatically. The details of the growth policy are not
34	>	* specified.
35		*
36	+	* <p>The Iterator provided in method {@link #iterator()} is <em>not</em>
37	+	* guaranteed to traverse the elements of the PriorityQueue in any
38	+	* particular order. If you need ordered traversal, consider using
39	+	* <tt>Arrays.sort(pq.toArray())</tt>.
40	+	*
41	+	* <p> <strong>Note that this implementation is not synchronized.</strong>
42	+	* Multiple threads should not access a <tt>PriorityQueue</tt>
43	+	* instance concurrently if any of the threads modifies the list
44	+	* structurally. Instead, use the thread-safe {@link
45	+	* java.util.concurrent.PriorityBlockingQueue} class.
46	+	*
47	+	*
48		* <p>Implementation note: this implementation provides O(log(n)) time
49		* for the insertion methods (<tt>offer</tt>, <tt>poll</tt>,
50		* <tt>remove()</tt> and <tt>add</tt>) methods; linear time for the
#	Line 38 \| Line 56
56		* <a href="{@docRoot}/../guide/collections/index.html">
57		* Java Collections Framework</a>.
58		* @since 1.5
59	+	* @version %I%, %G%
60		* @author Josh Bloch
61		*/
62		public class PriorityQueue<E> extends AbstractQueue<E>
63	<	implements Sorted, Queue<E>, java.io.Serializable {
63	>	implements Queue<E>, java.io.Serializable {
64	>
65	>	private static final long serialVersionUID = -7720805057305804111L;
66
67		private static final int DEFAULT_INITIAL_CAPACITY = 11;
68
#	Line 80 \| Line 101 \| public class PriorityQueue<E> extends Ab
101		/**
102		* Creates a <tt>PriorityQueue</tt> with the default initial capacity
103		* (11) that orders its elements according to their natural
104	<	* ordering (using <tt>Comparable</tt>.)
104	>	* ordering (using <tt>Comparable</tt>).
105		*/
106		public PriorityQueue() {
107		this(DEFAULT_INITIAL_CAPACITY, null);
#	Line 89 \| Line 110 \| public class PriorityQueue<E> extends Ab
110		/**
111		* Creates a <tt>PriorityQueue</tt> with the specified initial capacity
112		* that orders its elements according to their natural ordering
113	<	* (using <tt>Comparable</tt>.)
113	>	* (using <tt>Comparable</tt>).
114		*
115		* @param initialCapacity the initial capacity for this priority queue.
116	+	* @throws IllegalArgumentException if <tt>initialCapacity</tt> is less
117	+	* than 1
118		*/
119		public PriorityQueue(int initialCapacity) {
120		this(initialCapacity, null);
#	Line 108 \| Line 131 \| public class PriorityQueue<E> extends Ab
131		* @throws IllegalArgumentException if <tt>initialCapacity</tt> is less
132		* than 1
133		*/
134	<	public PriorityQueue(int initialCapacity, Comparator<? super E> comparator) {
134	>	public PriorityQueue(int initialCapacity,
135	>	Comparator<? super E> comparator) {
136		if (initialCapacity < 1)
137		throw new IllegalArgumentException();
138		this.queue = new Object[initialCapacity + 1];
#	Line 116 \| Line 140 \| public class PriorityQueue<E> extends Ab
140		}
141
142		/**
143	<	* Creates a <tt>PriorityQueue</tt> containing the elements in the
144	<	* specified collection.
145	<	* The priority queue has an initial capacity of 110% of the
146	<	* size of the specified collection or 1 if the collection is empty.
147	<	* If the specified collection
148	<	* implements the {@link Sorted} interface, the priority queue will be
149	<	* sorted according to the same comparator, or according to its elements'
150	<	* natural order if the collection is sorted according to its elements'
151	<	* natural order. If the specified collection does not implement
152	<	* <tt>Sorted</tt>, the priority queue is ordered according to
153	<	* its elements' natural order.
143	>	* Common code to initialize underlying queue array across
144	>	* constructors below.
145	>	*/
146	>	private void initializeArray(Collection<? extends E> c) {
147	>	int sz = c.size();
148	>	int initialCapacity = (int)Math.min((sz * 110L) / 100,
149	>	Integer.MAX_VALUE - 1);
150	>	if (initialCapacity < 1)
151	>	initialCapacity = 1;
152	>
153	>	this.queue = new Object[initialCapacity + 1];
154	>	}
155	>
156	>	/**
157	>	* Initially fill elements of the queue array under the
158	>	* knowledge that it is sorted or is another PQ, in which
159	>	* case we can just place the elements in the order presented.
160	>	*/
161	>	private void fillFromSorted(Collection<? extends E> c) {
162	>	for (Iterator<? extends E> i = c.iterator(); i.hasNext(); )
163	>	queue[++size] = i.next();
164	>	}
165	>
166	>	/**
167	>	* Initially fill elements of the queue array that is not to our knowledge
168	>	* sorted, so we must rearrange the elements to guarantee the heap
169	>	* invariant.
170	>	*/
171	>	private void fillFromUnsorted(Collection<? extends E> c) {
172	>	for (Iterator<? extends E> i = c.iterator(); i.hasNext(); )
173	>	queue[++size] = i.next();
174	>	heapify();
175	>	}
176	>
177	>	/**
178	>	* Creates a <tt>PriorityQueue</tt> containing the elements in the
179	>	* specified collection. The priority queue has an initial
180	>	* capacity of 110% of the size of the specified collection or 1
181	>	* if the collection is empty. If the specified collection is an
182	>	* instance of a {@link java.util.SortedSet} or is another
183	>	* <tt>PriorityQueue</tt>, the priority queue will be sorted
184	>	* according to the same comparator, or according to its elements'
185	>	* natural order if the collection is sorted according to its
186	>	* elements' natural order. Otherwise, the priority queue is
187	>	* ordered according to its elements' natural order.
188		*
189		* @param c the collection whose elements are to be placed
190		* into this priority queue.
#	Line 137 \| Line 195 \| public class PriorityQueue<E> extends Ab
195		* is <tt>null</tt>
196		*/
197		public PriorityQueue(Collection<? extends E> c) {
198	<	int sz = c.size();
199	<	int initialCapacity = (int)Math.min((sz * 110L) / 100,
200	<	Integer.MAX_VALUE - 1);
201	<	if (initialCapacity < 1)
202	<	initialCapacity = 1;
203	<
204	<	this.queue = new Object[initialCapacity + 1];
205	<
206	<	if (c instanceof Sorted) {
207	<	comparator = (Comparator<? super E>)((Sorted)c).comparator();
198	>	initializeArray(c);
199	>	if (c instanceof SortedSet) {
200	>	// @fixme double-cast workaround for compiler
201	>	SortedSet<? extends E> s = (SortedSet<? extends E>) (SortedSet)c;
202	>	comparator = (Comparator<? super E>)s.comparator();
203	>	fillFromSorted(s);
204	>	} else if (c instanceof PriorityQueue) {
205	>	PriorityQueue<? extends E> s = (PriorityQueue<? extends E>) c;
206	>	comparator = (Comparator<? super E>)s.comparator();
207	>	fillFromSorted(s);
208		} else {
209		comparator = null;
210	+	fillFromUnsorted(c);
211		}
212	+	}
213
214	<	for (Iterator<? extends E> i = c.iterator(); i.hasNext(); )
215	<	add(i.next());
214	>	/**
215	>	* Creates a <tt>PriorityQueue</tt> containing the elements in the
216	>	* specified collection. The priority queue has an initial
217	>	* capacity of 110% of the size of the specified collection or 1
218	>	* if the collection is empty. This priority queue will be sorted
219	>	* according to the same comparator as the given collection, or
220	>	* according to its elements' natural order if the collection is
221	>	* sorted according to its elements' natural order.
222	>	*
223	>	* @param c the collection whose elements are to be placed
224	>	* into this priority queue.
225	>	* @throws ClassCastException if elements of the specified collection
226	>	* cannot be compared to one another according to the priority
227	>	* queue's ordering.
228	>	* @throws NullPointerException if <tt>c</tt> or any element within it
229	>	* is <tt>null</tt>
230	>	*/
231	>	public PriorityQueue(PriorityQueue<? extends E> c) {
232	>	initializeArray(c);
233	>	comparator = (Comparator<? super E>)c.comparator();
234	>	fillFromSorted(c);
235		}
236
237	<	// Queue Methods
237	>	/**
238	>	* Creates a <tt>PriorityQueue</tt> containing the elements in the
239	>	* specified collection. The priority queue has an initial
240	>	* capacity of 110% of the size of the specified collection or 1
241	>	* if the collection is empty. This priority queue will be sorted
242	>	* according to the same comparator as the given collection, or
243	>	* according to its elements' natural order if the collection is
244	>	* sorted according to its elements' natural order.
245	>	*
246	>	* @param c the collection whose elements are to be placed
247	>	* into this priority queue.
248	>	* @throws ClassCastException if elements of the specified collection
249	>	* cannot be compared to one another according to the priority
250	>	* queue's ordering.
251	>	* @throws NullPointerException if <tt>c</tt> or any element within it
252	>	* is <tt>null</tt>
253	>	*/
254	>	public PriorityQueue(SortedSet<? extends E> c) {
255	>	initializeArray(c);
256	>	comparator = (Comparator<? super E>)c.comparator();
257	>	fillFromSorted(c);
258	>	}
259
260		/**
261	<	* Add the specified element to this priority queue.
261	>	* Resize array, if necessary, to be able to hold given index
262	>	*/
263	>	private void grow(int index) {
264	>	int newlen = queue.length;
265	>	if (index < newlen) // don't need to grow
266	>	return;
267	>	if (index == Integer.MAX_VALUE)
268	>	throw new OutOfMemoryError();
269	>	while (newlen <= index) {
270	>	if (newlen >= Integer.MAX_VALUE / 2) // avoid overflow
271	>	newlen = Integer.MAX_VALUE;
272	>	else
273	>	newlen <<= 2;
274	>	}
275	>	Object[] newQueue = new Object[newlen];
276	>	System.arraycopy(queue, 0, newQueue, 0, queue.length);
277	>	queue = newQueue;
278	>	}
279	>
280	>
281	>	/**
282	>	* Inserts the specified element to this priority queue.
283		*
284		* @return <tt>true</tt>
285		* @throws ClassCastException if the specified element cannot be compared
#	Line 173 \| Line 294 \| public class PriorityQueue<E> extends Ab
294		++size;
295
296		// Grow backing store if necessary
297	<	while (size >= queue.length) {
298	<	Object[] newQueue = new Object[2 * queue.length];
178	<	System.arraycopy(queue, 0, newQueue, 0, queue.length);
179	<	queue = newQueue;
180	<	}
297	>	if (size >= queue.length)
298	>	grow(size);
299
300		queue[size] = o;
301		fixUp(size);
302		return true;
303		}
304
305	<	public E poll() {
305	>	public E peek() {
306		if (size == 0)
307		return null;
190	–	return (E) remove(1);
191	–	}
192	–
193	–	public E peek() {
308		return (E) queue[1];
309		}
310
311	<	// Collection Methods
198	<
199	<	// these first two override just to get the throws docs
311	>	// Collection Methods - the first two override to update docs
312
313		/**
314	+	* Adds the specified element to this queue.
315	+	* @return <tt>true</tt> (as per the general contract of
316	+	* <tt>Collection.add</tt>).
317	+	*
318		* @throws NullPointerException if the specified element is <tt>null</tt>.
319		* @throws ClassCastException if the specified element cannot be compared
320		* with elements currently in the priority queue according
#	Line 208 \| Line 324 \| public class PriorityQueue<E> extends Ab
324		return super.add(o);
325		}
326
327	+
328		/**
329	+	* Adds all of the elements in the specified collection to this queue.
330	+	* The behavior of this operation is undefined if
331	+	* the specified collection is modified while the operation is in
332	+	* progress. (This implies that the behavior of this call is undefined if
333	+	* the specified collection is this queue, and this queue is nonempty.)
334	+	* <p>
335	+	* This implementation iterates over the specified collection, and adds
336	+	* each object returned by the iterator to this collection, in turn.
337	+	* @param c collection whose elements are to be added to this queue
338	+	* @return <tt>true</tt> if this queue changed as a result of the
339	+	* call.
340	+	* @throws NullPointerException if <tt>c</tt> or any element in <tt>c</tt>
341	+	* is <tt>null</tt>
342		* @throws ClassCastException if any element cannot be compared
343		* with elements currently in the priority queue according
344		* to the priority queue's ordering.
215	–	* @throws NullPointerException if <tt>c</tt> or any element in <tt>c</tt>
216	–	* is <tt>null</tt>
345		*/
346		public boolean addAll(Collection<? extends E> c) {
347		return super.addAll(c);
#	Line 226 \| Line 354 \| public class PriorityQueue<E> extends Ab
354		if (comparator == null) {
355		for (int i = 1; i <= size; i++) {
356		if (((Comparable<E>)queue[i]).compareTo((E)o) == 0) {
357	<	remove(i);
357	>	removeAt(i);
358		return true;
359		}
360		}
361		} else {
362		for (int i = 1; i <= size; i++) {
363		if (comparator.compare((E)queue[i], (E)o) == 0) {
364	<	remove(i);
364	>	removeAt(i);
365		return true;
366		}
367		}
#	Line 241 \| Line 369 \| public class PriorityQueue<E> extends Ab
369		return false;
370		}
371
372	+	/**
373	+	* Returns an iterator over the elements in this queue. The iterator
374	+	* does not return the elements in any particular order.
375	+	*
376	+	* @return an iterator over the elements in this queue.
377	+	*/
378		public Iterator<E> iterator() {
379		return new Itr();
380		}
381
382		private class Itr implements Iterator<E> {
383	+
384		/**
385		* Index (into queue array) of element to be returned by
386		* subsequent call to next.
#	Line 253 \| Line 388 \| public class PriorityQueue<E> extends Ab
388		private int cursor = 1;
389
390		/**
391	<	* Index of element returned by most recent call to next or
392	<	* previous. Reset to 0 if this element is deleted by a call
393	<	* to remove.
391	>	* Index of element returned by most recent call to next,
392	>	* unless that element came from the forgetMeNot list.
393	>	* Reset to 0 if element is deleted by a call to remove.
394		*/
395		private int lastRet = 0;
396
#	Line 266 \| Line 401 \| public class PriorityQueue<E> extends Ab
401		*/
402		private int expectedModCount = modCount;
403
404	+	/**
405	+	* A list of elements that were moved from the unvisited portion of
406	+	* the heap into the visited portion as a result of "unlucky" element
407	+	* removals during the iteration. (Unlucky element removals are those
408	+	* that require a fixup instead of a fixdown.) We must visit all of
409	+	* the elements in this list to complete the iteration. We do this
410	+	* after we've completed the "normal" iteration.
411	+	*
412	+	* We expect that most iterations, even those involving removals,
413	+	* will not use need to store elements in this field.
414	+	*/
415	+	private ArrayList<E> forgetMeNot = null;
416	+
417	+	/**
418	+	* Element returned by the most recent call to next iff that
419	+	* element was drawn from the forgetMeNot list.
420	+	*/
421	+	private Object lastRetElt = null;
422	+
423		public boolean hasNext() {
424	<	return cursor <= size;
424	>	return cursor <= size \|\| forgetMeNot != null;
425		}
426
427		public E next() {
428		checkForComodification();
429	<	if (cursor > size)
429	>	E result;
430	>	if (cursor <= size) {
431	>	result = (E) queue[cursor];
432	>	lastRet = cursor++;
433	>	}
434	>	else if (forgetMeNot == null)
435		throw new NoSuchElementException();
436	<	E result = (E) queue[cursor];
437	<	lastRet = cursor++;
436	>	else {
437	>	int remaining = forgetMeNot.size();
438	>	result = forgetMeNot.remove(remaining - 1);
439	>	if (remaining == 1)
440	>	forgetMeNot = null;
441	>	lastRet = 0;
442	>	lastRetElt = result;
443	>	}
444		return result;
445		}
446
447		public void remove() {
283	–	if (lastRet == 0)
284	–	throw new IllegalStateException();
448		checkForComodification();
449
450	<	PriorityQueue.this.remove(lastRet);
451	<	if (lastRet < cursor)
452	<	cursor--;
453	<	lastRet = 0;
450	>	if (lastRet != 0) {
451	>	E moved = PriorityQueue.this.removeAt(lastRet);
452	>	lastRet = 0;
453	>	if (moved == null) {
454	>	cursor--;
455	>	} else {
456	>	if (forgetMeNot == null)
457	>	forgetMeNot = new ArrayList<E>();
458	>	forgetMeNot.add(moved);
459	>	}
460	>	} else if (lastRetElt != null) {
461	>	PriorityQueue.this.remove(lastRetElt);
462	>	lastRetElt = null;
463	>	} else {
464	>	throw new IllegalStateException();
465	>	}
466	>
467		expectedModCount = modCount;
468		}
469
#	Line 297 \| Line 473 \| public class PriorityQueue<E> extends Ab
473		}
474		}
475
300	–	/**
301	–	* Returns the number of elements in this priority queue.
302	–	*
303	–	* @return the number of elements in this priority queue.
304	–	*/
476		public int size() {
477		return size;
478		}
#	Line 319 \| Line 490 \| public class PriorityQueue<E> extends Ab
490		size = 0;
491		}
492
493	+	public E poll() {
494	+	if (size == 0)
495	+	return null;
496	+	modCount++;
497	+
498	+	E result = (E) queue[1];
499	+	queue[1] = queue[size];
500	+	queue[size--] = null; // Drop extra ref to prevent memory leak
501	+	if (size > 1)
502	+	fixDown(1);
503	+
504	+	return result;
505	+	}
506	+
507		/**
508	<	* Removes and returns the ith element from queue. Recall
509	<	* that queue is one-based, so 1 <= i <= size.
508	>	* Removes and returns the ith element from queue. (Recall that queue
509	>	* is one-based, so 1 <= i <= size.)
510		*
511	<	* XXX: Could further special-case i==size, but is it worth it?
512	<	* XXX: Could special-case i==0, but is it worth it?
511	>	* Normally this method leaves the elements at positions from 1 up to i-1,
512	>	* inclusive, untouched. Under these circumstances, it returns null.
513	>	* Occasionally, in order to maintain the heap invariant, it must move
514	>	* the last element of the list to some index in the range [2, i-1],
515	>	* and move the element previously at position (i/2) to position i.
516	>	* Under these circumstances, this method returns the element that was
517	>	* previously at the end of the list and is now at some position between
518	>	* 2 and i-1 inclusive.
519		*/
520	<	private E remove(int i) {
521	<	assert i <= size;
520	>	private E removeAt(int i) {
521	>	assert i > 0 && i <= size;
522		modCount++;
523
524	<	E result = (E) queue[i];
525	<	queue[i] = queue[size];
524	>	E moved = (E) queue[size];
525	>	queue[i] = moved;
526		queue[size--] = null; // Drop extra ref to prevent memory leak
527	<	if (i <= size)
527	>	if (i <= size) {
528		fixDown(i);
529	<	return result;
529	>	if (queue[i] == moved) {
530	>	fixUp(i);
531	>	if (queue[i] != moved)
532	>	return moved;
533	>	}
534	>	}
535	>	return null;
536		}
537
538		/**
#	Line 358 \| Line 555 \| public class PriorityQueue<E> extends Ab
555		}
556		} else {
557		while (k > 1) {
558	<	int j = k >> 1;
558	>	int j = k >>> 1;
559		if (comparator.compare((E)queue[j], (E)queue[k]) <= 0)
560		break;
561		Object tmp = queue[j]; queue[j] = queue[k]; queue[k] = tmp;
#	Line 379 \| Line 576 \| public class PriorityQueue<E> extends Ab
576		private void fixDown(int k) {
577		int j;
578		if (comparator == null) {
579	<	while ((j = k << 1) <= size) {
580	<	if (j<size && ((Comparable<E>)queue[j]).compareTo((E)queue[j+1]) > 0)
579	>	while ((j = k << 1) <= size && (j > 0)) {
580	>	if (j<size &&
581	>	((Comparable<E>)queue[j]).compareTo((E)queue[j+1]) > 0)
582		j++; // j indexes smallest kid
583	+
584		if (((Comparable<E>)queue[k]).compareTo((E)queue[j]) <= 0)
585		break;
586		Object tmp = queue[j]; queue[j] = queue[k]; queue[k] = tmp;
587		k = j;
588		}
589		} else {
590	<	while ((j = k << 1) <= size) {
591	<	if (j < size && comparator.compare((E)queue[j], (E)queue[j+1]) > 0)
590	>	while ((j = k << 1) <= size && (j > 0)) {
591	>	if (j<size &&
592	>	comparator.compare((E)queue[j], (E)queue[j+1]) > 0)
593		j++; // j indexes smallest kid
594		if (comparator.compare((E)queue[k], (E)queue[j]) <= 0)
595		break;
#	Line 399 \| Line 599 \| public class PriorityQueue<E> extends Ab
599		}
600		}
601
602	+	/**
603	+	* Establishes the heap invariant (described above) in the entire tree,
604	+	* assuming nothing about the order of the elements prior to the call.
605	+	*/
606	+	private void heapify() {
607	+	for (int i = size/2; i >= 1; i--)
608	+	fixDown(i);
609	+	}
610	+
611	+	/**
612	+	* Returns the comparator used to order this collection, or <tt>null</tt>
613	+	* if this collection is sorted according to its elements natural ordering
614	+	* (using <tt>Comparable</tt>).
615	+	*
616	+	* @return the comparator used to order this collection, or <tt>null</tt>
617	+	* if this collection is sorted according to its elements natural ordering.
618	+	*/
619		public Comparator<? super E> comparator() {
620		return comparator;
621		}
#	Line 412 \| Line 629 \| public class PriorityQueue<E> extends Ab
629		* <tt>Object</tt>) in the proper order.
630		* @param s the stream
631		*/
632	<	private synchronized void writeObject(java.io.ObjectOutputStream s)
632	>	private void writeObject(java.io.ObjectOutputStream s)
633		throws java.io.IOException{
634		// Write out element count, and any hidden stuff
635		s.defaultWriteObject();
#	Line 421 \| Line 638 \| public class PriorityQueue<E> extends Ab
638		s.writeInt(queue.length);
639
640		// Write out all elements in the proper order.
641	<	for (int i=0; i<size; i++)
641	>	for (int i=1; i<=size; i++)
642		s.writeObject(queue[i]);
643		}
644
#	Line 430 \| Line 647 \| public class PriorityQueue<E> extends Ab
647		* deserialize it).
648		* @param s the stream
649		*/
650	<	private synchronized void readObject(java.io.ObjectInputStream s)
650	>	private void readObject(java.io.ObjectInputStream s)
651		throws java.io.IOException, ClassNotFoundException {
652		// Read in size, and any hidden stuff
653		s.defaultReadObject();
#	Line 440 \| Line 657 \| public class PriorityQueue<E> extends Ab
657		queue = new Object[arrayLength];
658
659		// Read in all elements in the proper order.
660	<	for (int i=0; i<size; i++)
661	<	queue[i] = s.readObject();
660	>	for (int i=1; i<=size; i++)
661	>	queue[i] = (E) s.readObject();
662		}
663
664		}
448	–

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Comparing jsr166/src/main/java/util/PriorityQueue.java (file contents): Revision 1.21 by dholmes, Tue Aug 5 06:49:51 2003 UTC vs. Revision 1.40 by dl, Fri Sep 12 15:38:26 2003 UTC

Diff Legend

Comparing jsr166/src/main/java/util/PriorityQueue.java (file contents):
Revision 1.21 by dholmes, Tue Aug 5 06:49:51 2003 UTC vs.
Revision 1.40 by dl, Fri Sep 12 15:38:26 2003 UTC