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  • Java 中 List 向前和向后遍历

    Java 中 List 向前和向后遍历

    import java.util.*;
    public class TestCollectionIterator {
        public static void main(String args[]){
            ArrayList<String> al=new ArrayList<String>();
            al.add("Amit");
            al.add("Vijay");
            al.add("Kumar");
            al.add(1,"Sachin");
            System.out.println("element at 2nd position: "+al.get(2));
            ListIterator<String> itr=al.listIterator();
            System.out.println("traversing elements in forward direction...");
            while(itr.hasNext()){
                System.out.println(itr.next());
            }
            System.out.println("
    traversing elements in backward direction...");
            while(itr.hasPrevious()){
                System.out.println(itr.previous());
            }
        }
    }
    

    参考答案

    ``` element at 2nd position: Vijay traversing elements in forward direction... Amit Sachin Vijay Kumar

    traversing elements in backward direction...
    Kumar
    Vijay
    Sachin
    Amit

    </div>
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  • 原文地址:https://www.cnblogs.com/hgnulb/p/9942013.html
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