Mega Code Archive

0272 List interface

An ordered collection. This interface is a member of the Java Collections Framework. Add element to List boolean add(E e) Appends the specified element to the end of this list (optional operation). void add(int index, E element) Inserts the specified element at the specified position in this list (optional operation). 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 (optional operation). boolean addAll(int index, Collection<? extends E> c) Inserts all of the elements in the specified collection into this list at the specified position (optional operation). Clear a List void clear() Removes all of the elements from this list (optional operation). Does it contain certain element boolean contains(Object o) Returns true if this list contains the specified element. boolean containsAll(Collection<?> c) Returns true if this list contains all of the elements of the specified collection. Compare two Lists boolean equals(Object o) Compares the specified object with this list for equality. Get the element index 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. 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. Get the iterator for a List Iterator<E> iterator() Returns an iterator over the elements in this list in proper sequence. ListIterator<E> listIterator() Returns a list iterator over the elements in this list (in proper sequence). ListIterator<E> listIterator(int index) Returns a list iterator of the elements in this list (in proper sequence), starting at the specified position in this list. Remove element from List E remove(int index) Removes the element at the specified position in this list (optional operation). boolean remove(Object o) Removes the first occurrence of the specified element from this list, if it is present (optional operation). boolean removeAll(Collection<?> c) Removes from this list all of its elements that are contained in the specified collection (optional operation). boolean retainAll(Collection<?> c) Retains only the elements in this list that are contained in the specified collection (optional operation). Get/set element E get(int index) Returns the element at the specified position in this list. E set(int index, E element) Replaces the element at the specified position in this list with the specified element (optional operation). List size and empty flag boolean isEmpty() Returns true if this list contains no elements. int size() Returns the number of elements in this list. Get the sub list from a list List<E> subList(int fromIndex, int toIndex) Returns a view of the portion of this list between the specified fromIndex, inclusive, and toIndex, exclusive. Convert List to Array Object[] toArray() Returns an array containing all of the elements in this list. <T> T[] toArray(T[] a) Returns an array containing all of the elements in this list. Revised from Open JDK source code