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ListIterator listIter = list.listIterator();
listIter.add(new Integer(0));
System.out.println("After add at beginning:"+list);
if ( listIter.hasNext() ) {
int i = listIter.nextIndex();
listIter.next();
listIter.set(new Integer(9));
System.out.println("After set at "+i+":"+list);}
if ( listIter.hasNext() ) {
int i = listIter.nextIndex();
listIter.next();
listIter.remove();
System.out.println("After remove at "+i+" : "+list);
}
">1.import java.util.*;public class ListIteratorDemo {
public static void main(String] args) {
List list = new ArrayList();
for(int i=1; i<5; i++){
list.add(new Integer(i));}
System.out.println("The original list : "+list);
ListIterator listIter = list.listIterator();
listIter.add(new Integer(0));
System.out.println("After add at beginning:"+list);
if ( listIter.hasNext() ) {
int i = listIter.nextIndex();
listIter.next();
listIter.set(new Integer(9));
System.out.println("After set at "+i+":"+list);}
if ( listIter.hasNext() ) {
int i = listIter.nextIndex();
listIter.next();
listIter.remove();
System.out.println("After remove at "+i+" : "+list);
}
list.add("b");
list.add("c");
for (String obj : list) {
System.out.println(obj);
}
}
}
">2.代码二:import java.util.ArrayList;
public class Test02 {
public static void main(String] args) {
ArrayList list = new ArrayList();
list.add("a");
list.add("b");
list.add("c");
for (String obj : list) {
System.out.println(obj);
}
}
}
A、java.util.List
B、java.util.ArrayList
C、java.util.HashMap
D、java.util.LinkedList
list.add("demo_2");
list.add("demo_3");
ListIterator it = list.listIterator();
while(it.hasPrevious()) {
Object obj = it.previous();
System.out.print(obj+" ");
}
}
}
">4.代码三:import java.util.*;
public class Test03 {
public static void main(String] args) {
ArrayList list = new ArrayList();
list.add("demo_1");
list.add("demo_2");
list.add("demo_3");
ListIterator it = list.listIterator();
while(it.hasPrevious()) {
Object obj = it.previous();
System.out.print(obj+" ");
}
}
}
ListIterator支持双向遍历,Iterator仅支持单向遍历
B:ListIterator可以修改、添加、删除元素,Iterator全不支持
C:ListIterator继承于Iterator接口
D:只有List才能获得ListIterator,所有Collection都能获得Iterator
List
B:ArrayList
C:HashMap
D:LinkedList
A.ArrayList myList = new Object();
B.List myList = new ArrayList();
C.ArraylList myList = new List();
D.List myList = new List();
选项:A、B、C、D、set down
C:set off
D:set up
">8.The word "assemble" in Paragraph 5 is closest in meaning to 选项: A:set back
B:set down
C:set off
D:set up
showint
B:showipint
C:showip
D:showaccess-listIterator 接口是 Collection 接口的父接口。
B:从 JDK 5 开始,所有实现了 Iterable 的集合类都是迭代的,都支持 foreach 循环遍历。
C:可以通过 hasNext()方法获取下一个元素。
D:remove()方法移除迭代器返回的最后一个元素。
set about
B:set on
C:set in
D:set to
A、s1=set()
B、s2=set(“abcd”)
C、s3=(1,2,3,4)
D、s4=frozenset((3,2,1))
set back
B:set off
C:set out
D:set aside
set_color()
B:set_position()
C:set_ticks_position()
D:set_yticklabels()
list-style:none;
B:list-style:0;
C:list-style:zero;
D:list-style:delete;
Data
B:Database
C:Buffer
D:Stack
insert
B:add
C:append
D:concat
set...down
B:set…forth
C:set…apart
D:set…up