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ArrayList
ArrayList相当于STL里面的Vector。
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下面是成员方法。| Method Summary | |
| boolean | add(E e) |
| Appends the specified element to the end of this list. | |
| void | add(int index, E element) |
| Inserts the specified element at the specified position in this list. | |
| boolean | addAll(Collection<? extends E> c) |
| Appends all of the elements in the specified collection to the end of this list, in the order that they are returned by the specified collection‘s Iterator. | |
| boolean | addAll(int index, Collection<? extends E> c) |
| Inserts all of the elements in the specified collection into this list, starting at the specified position. | |
| void | clear() |
| Removes all of the elements from this list. | |
| Object | clone() |
| Returns a shallow copy of this ArrayList instance. | |
| boolean | contains(Object o) |
| Returns true if this list contains the specified element. | |
| void | ensureCapacity(int minCapacity) |
| Increases the capacity of this ArrayList instance, if necessary, to ensure that it can hold at least the number of elements specified by the minimum capacity argument. | |
| E | get(int index) |
| Returns the element at the specified position in this list. | |
| int | indexOf(Object o) |
| Returns the index of the first occurrence of the specified element in this list, or -1 if this list does not contain the element. | |
| boolean | isEmpty() |
| Returns true if this list contains no elements. | |
| int | lastIndexOf(Object o) |
| Returns the index of the last occurrence of the specified element in this list, or -1 if this list does not contain the element. | |
| E | remove(int index) |
| Removes the element at the specified position in this list. | |
| boolean | remove(Object o) |
| Removes the first occurrence of the specified element from this list, if it is present. | |
| protected void | removeRange(int fromIndex, int toIndex) |
| Removes from this list all of the elements whose index is between fromIndex, inclusive, and toIndex, exclusive. | |
| E | set(int index, E element) |
| Replaces the element at the specified position in this list with the specified element. | |
| int | size() |
| Returns the number of elements in this list. | |
| Object[] | toArray() |
| Returns an array containing all of the elements in this list in proper sequence (from first to last element). | |
| <T> T[] | toArray(T[] a) |
| Returns an array containing all of the elements in this list in proper sequence (from first to last element); the runtime type of the returned array is that of the specified array. | |
| void | trimToSize() |
| Trims the capacity of this ArrayList instance to be the list‘s current size. | |
ArrayList
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