AbstractSequentialList抽象类源码解析

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所在包

package java.util;

继承AbstractList抽象类

public abstract class AbstractSequentialList<E> extends AbstractList<E> {// 内部代码下面讲解}

空构造器

protected AbstractSequentialList() {    }

获取指定index位置的元素
这里是通过迭代器获取

 /* @throws IndexOutOfBoundsException {@inheritDoc}     */    public E get(int index) {        try {            return listIterator(index).next();        } catch (NoSuchElementException exc) {            throw new IndexOutOfBoundsException("Index: "+index);        }    }

更新index位置元素
通过迭代器更新

 /* @throws UnsupportedOperationException {@inheritDoc}     * @throws ClassCastException            {@inheritDoc}     * @throws NullPointerException          {@inheritDoc}     * @throws IllegalArgumentException      {@inheritDoc}     * @throws IndexOutOfBoundsException     {@inheritDoc}     */    public E set(int index, E element) {        try {            ListIterator<E> e = listIterator(index);            E oldVal = e.next();            e.set(element);            return oldVal;        } catch (NoSuchElementException exc) {            throw new IndexOutOfBoundsException("Index: "+index);        }    }

index位置插入元素

 /* @throws UnsupportedOperationException {@inheritDoc}     * @throws ClassCastException            {@inheritDoc}     * @throws NullPointerException          {@inheritDoc}     * @throws IllegalArgumentException      {@inheritDoc}     * @throws IndexOutOfBoundsException     {@inheritDoc}     */    public void add(int index, E element) {        try {            listIterator(index).add(element);        } catch (NoSuchElementException exc) {            throw new IndexOutOfBoundsException("Index: "+index);        }    }

删除元素 o

 /* @throws UnsupportedOperationException {@inheritDoc}     * @throws IndexOutOfBoundsException     {@inheritDoc}     */    public E remove(int index) {        try {            ListIterator<E> e = listIterator(index);            E outCast = e.next();            e.remove();            return outCast;        } catch (NoSuchElementException exc) {            throw new IndexOutOfBoundsException("Index: "+index);        }    }

index开始插入集合c中的元素

 /* @throws UnsupportedOperationException {@inheritDoc}     * @throws ClassCastException            {@inheritDoc}     * @throws NullPointerException          {@inheritDoc}     * @throws IllegalArgumentException      {@inheritDoc}     * @throws IndexOutOfBoundsException     {@inheritDoc}     */    public boolean addAll(int index, Collection<? extends E> c) {        try {            boolean modified = false;            ListIterator<E> e1 = listIterator(index);            Iterator<? extends E> e2 = c.iterator();            while (e2.hasNext()) {                e1.add(e2.next());                modified = true;            }            return modified;        } catch (NoSuchElementException exc) {            throw new IndexOutOfBoundsException("Index: "+index);        }    }

获取迭代器

public Iterator<E> iterator() {        return listIterator();    }

迭代器抽象方法

 /* @throws IndexOutOfBoundsException {@inheritDoc}     */    public abstract ListIterator<E> listIterator(int index);

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