Java 核心技术（第八版）卷1：基础知识：例13-2P567LinkedListTest

import java.util.*;
//本程序演示了 链表的基础操作
public class LinkedListTest {
    public static void main(String[] args)
    {
        List first_list=new LinkedList();
        first_list.add("Amy");
        first_list.add("Carl");
        first_list.add("Erica");
        System.out.println("Original first_list:"+first_list);
        ListIterator iter_a=first_list.listIterator();
        iter_a.next();//略过第一个元素,
        iter_a.add("Juliet");//这样就在Amy之后，添加了Juliet 这个元素
        System.out.println("After use iter_a.next() and iter_a.add, a:"+first_list);
       // iter_a.set("new new new ");//这样直接使用set会报错
       //  System.out.println("After use iter_a.set(), a:"+a);
        iter_a.next();//首先调用一次 next，再使用set
        iter_a.set("IamNew");//set 方法 会取代next 或previous 方法返回的上一个元素。
        System.out.println("set method will replace the element 's value after use next or previous:");
        System.out.println("After use iter_a.next and iter_a.set(), a:"+first_list);
        ListIterator iter_aa=first_list.listIterator();
        iter_aa.add("IamNewNew");
        System.out.println("first we create a new iterator,then use add,we will add the new element to the head of the list" +
                " a:"+first_list);
        System.out.println("the previous index is:"+iter_aa.previousIndex());
        System.out.println("the next index is"+iter_aa.nextIndex());
        System.out.println("***Below is the orginal code of the core java book***");
        List a=new LinkedList();
        a.add("Amy");
        a.add("Carl");
        a.add("Erica");
        System.out.println("Original a:"+a);
        List b=new LinkedList();
        b.add("Bob");
        b.add("Doug");
        b.add("France");
        b.add("Gloria");
        System.out.println("Original b:"+b);
        //merge the words from b to a
        ListIterator aIter=a.listIterator();
        Iterator bIter=b.iterator();

        while (bIter.hasNext())
        {
            if(aIter.hasNext()) aIter.next();
            aIter.add(bIter.next());
        }
        System.out.println("After merge b to a:"+a);
        //remove every second word from b
        bIter=b.iterator();
        while (bIter.hasNext())
        {
            bIter.next();//skip one element
            if(bIter.hasNext())
            {
                bIter.next();//skip next element
                bIter.remove();//remove that element
            }
        }
        System.out.println(b);
        //批量操作：从a 中删除所有b中的word
        a.removeAll(b);
        System.out.println(a);
    }
}

结果如下：

Original first_list:[Amy, Carl, Erica]
After use iter_a.next() and iter_a.add, a:[Amy, Juliet, Carl, Erica]
set method will replace the element 's value after use next or previous:
After use iter_a.next and iter_a.set(), a:[Amy, Juliet, IamNew, Erica]
first we create a new iterator,then use add,we will add the new element to the head of the list a:[IamNewNew, Amy, Juliet, IamNew, Erica]
the previous index is:0
the next index is1
***Below is the orginal code of the core java book***
Original a:[Amy, Carl, Erica]
Original b:[Bob, Doug, France, Gloria]
After merge b to a:[Amy, Bob, Carl, Doug, Erica, France, Gloria]
[Bob, France]
[Amy, Carl, Doug, Erica, Gloria]

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