Java中List向前和向後遍歷
阿新 • • 發佈:2018-11-11
clas 遍歷 ... string tcollect sta position elements \n
Java中List向前和向後遍歷
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("\ntraversing elements in backward direction..."); while(itr.hasPrevious()){ System.out.println(itr.previous()); } } }
element at 2nd position: Vijay
traversing elements in forward direction...
Amit
Sachin
Vijay
Kumar
traversing elements in backward direction...
Kumar
Vijay
Sachin
Amit
Java中List向前和向後遍歷