| 375 |
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// Search Operations |
| 376 |
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|
| 377 |
|
/** |
| 378 |
< |
* Returns the index in this list of the first occurrence of the |
| 379 |
< |
* specified element, or -1 if the List does not contain this |
| 380 |
< |
* element. More formally, returns the lowest index i such that |
| 381 |
< |
* <tt>(o==null ? get(i)==null : o.equals(get(i)))</tt>, or -1 if |
| 382 |
< |
* there is no such index. |
| 378 |
> |
* Returns the index of the first occurrence of the specified element |
| 379 |
> |
* in this list, or -1 if this list does not contain the element. |
| 380 |
> |
* More formally, returns the lowest index <tt>i</tt> such that |
| 381 |
> |
* <tt>(o==null ? get(i)==null : o.equals(get(i)))</tt>, |
| 382 |
> |
* or -1 if there is no such index. |
| 383 |
|
* |
| 384 |
|
* @param o element to search for |
| 385 |
< |
* @return the index in this list of the first occurrence of the |
| 386 |
< |
* specified element, or -1 if the list does not contain this |
| 387 |
< |
* element |
| 385 |
> |
* @return the index of the first occurrence of the specified element in |
| 386 |
> |
* this list, or -1 if this list does not contain the element |
| 387 |
|
*/ |
| 388 |
|
public int indexOf(Object o) { |
| 389 |
|
int index = 0; |
| 404 |
|
} |
| 405 |
|
|
| 406 |
|
/** |
| 407 |
< |
* Returns the index in this list of the last occurrence of the |
| 408 |
< |
* specified element, or -1 if the list does not contain this |
| 409 |
< |
* element. More formally, returns the highest index i such that |
| 410 |
< |
* <tt>(o==null ? get(i)==null : o.equals(get(i)))</tt>, or -1 if |
| 411 |
< |
* there is no such index. |
| 407 |
> |
* Returns the index of the last occurrence of the specified element |
| 408 |
> |
* in this list, or -1 if this list does not contain the element. |
| 409 |
> |
* More formally, returns the highest index <tt>i</tt> such that |
| 410 |
> |
* <tt>(o==null ? get(i)==null : o.equals(get(i)))</tt>, |
| 411 |
> |
* or -1 if there is no such index. |
| 412 |
|
* |
| 413 |
|
* @param o element to search for |
| 414 |
< |
* @return the index in this list of the last occurrence of the |
| 415 |
< |
* specified element, or -1 if the list does not contain this |
| 417 |
< |
* element |
| 414 |
> |
* @return the index of the last occurrence of the specified element in |
| 415 |
> |
* this list, or -1 if this list does not contain the element |
| 416 |
|
*/ |
| 417 |
|
public int lastIndexOf(Object o) { |
| 418 |
|
int index = size; |
| 822 |
|
|
| 823 |
|
/** |
| 824 |
|
* Returns an array containing all of the elements in this list |
| 825 |
< |
* in the correct order. |
| 825 |
> |
* in proper sequence (from first to last element). |
| 826 |
|
* |
| 827 |
+ |
* <p>The returned array will be "safe" in that no references to it are |
| 828 |
+ |
* maintained by this list. (In other words, this method must allocate |
| 829 |
+ |
* a new array). The caller is thus free to modify the returned array. |
| 830 |
+ |
* |
| 831 |
|
* @return an array containing all of the elements in this list |
| 832 |
< |
* in the correct order |
| 832 |
> |
* in proper sequence |
| 833 |
|
*/ |
| 834 |
|
public Object[] toArray() { |
| 835 |
|
Object[] result = new Object[size]; |
| 841 |
|
|
| 842 |
|
/** |
| 843 |
|
* Returns an array containing all of the elements in this list in |
| 844 |
< |
* the correct order; the runtime type of the returned array is that of |
| 845 |
< |
* the specified array. If the list fits in the specified array, it |
| 846 |
< |
* is returned therein. Otherwise, a new array is allocated with the |
| 847 |
< |
* runtime type of the specified array and the size of this list.<p> |
| 848 |
< |
* |
| 849 |
< |
* If the list fits in the specified array with room to spare |
| 850 |
< |
* (i.e., the array has more elements than the list), |
| 851 |
< |
* the element in the array immediately following the end of the |
| 852 |
< |
* collection is set to null. This is useful in determining the length |
| 853 |
< |
* of the list <i>only</i> if the caller knows that the list |
| 854 |
< |
* does not contain any null elements. |
| 844 |
> |
* proper sequence (from first to last element); the runtime type of |
| 845 |
> |
* the returned array is that of the specified array. If the list fits |
| 846 |
> |
* in the specified array, it is returned therein. Otherwise, a new |
| 847 |
> |
* array is allocated with the runtime type of the specified array and |
| 848 |
> |
* the size of this list. |
| 849 |
> |
* |
| 850 |
> |
* <p>If the list fits in the specified array with room to spare (i.e., |
| 851 |
> |
* the array has more elements than the list), the element in the array |
| 852 |
> |
* immediately following the end of the list is set to <tt>null</tt>. |
| 853 |
> |
* (This is useful in determining the length of the list <i>only</i> if |
| 854 |
> |
* the caller knows that the list does not contain any null elements.) |
| 855 |
> |
* |
| 856 |
> |
* <p>Like the {@link #toArray()} method, this method acts as bridge between |
| 857 |
> |
* array-based and collection-based APIs. Further, this method allows |
| 858 |
> |
* precise control over the runtime type of the output array, and may, |
| 859 |
> |
* under certain circumstances, be used to save allocation costs. |
| 860 |
> |
* |
| 861 |
> |
* <p>Suppose <tt>x</tt> is a list known to contain only strings. |
| 862 |
> |
* The following code can be used to dump the list into a newly |
| 863 |
> |
* allocated array of <tt>String</tt>: |
| 864 |
> |
* |
| 865 |
> |
* <pre> |
| 866 |
> |
* String[] y = x.toArray(new String[0]);</pre> |
| 867 |
> |
* |
| 868 |
> |
* Note that <tt>toArray(new Object[0])</tt> is identical in function to |
| 869 |
> |
* <tt>toArray()</tt>. |
| 870 |
|
* |
| 871 |
|
* @param a the array into which the elements of the list are to |
| 872 |
|
* be stored, if it is big enough; otherwise, a new array of the |
| 873 |
|
* same runtime type is allocated for this purpose. |
| 874 |
|
* @return an array containing the elements of the list |
| 875 |
< |
* @throws ArrayStoreException if the runtime type of a is not a |
| 876 |
< |
* supertype of the runtime type of every element in this list |
| 875 |
> |
* @throws ArrayStoreException if the runtime type of the specified array |
| 876 |
> |
* is not a supertype of the runtime type of every element in |
| 877 |
> |
* this list |
| 878 |
|
* @throws NullPointerException if the specified array is null |
| 879 |
|
*/ |
| 880 |
|
public <T> T[] toArray(T[] a) { |
