本示例向您展示如何使用ListIterator接口来迭代LinkedList的元素。
package org.nhooo.example.util;
import java.util.List;
import java.util.LinkedList;
import java.util.ListIterator;
public class LinkedListListIterator {
public static void main(String[] args) {
List<String> grades = new LinkedList<>();
grades.add("A");
grades.add("B");
grades.add("C");
grades.add("D");
grades.add("E");
// 使用ListIterator从LinkedList检索对象
// 接口。
ListIterator li = grades.listIterator();
while (li.hasNext()) {
System.out.println("Grades: " + li.next());
System.out.println(" hasPrevious : " + li.hasPrevious());
System.out.println(" hasNext : " + li.hasNext());
System.out.println(" previousIndex: " + li.previousIndex());
System.out.println(" nextIndex : " + li.nextIndex());
}
}
}该程序将打印以下输出：
Grades: A hasPrevious : true hasNext : true previousIndex: 0 nextIndex : 1 Grades: B hasPrevious : true hasNext : true previousIndex: 1 nextIndex : 2 Grades: C hasPrevious : true hasNext : true previousIndex: 2 nextIndex : 3 Grades: D hasPrevious : true hasNext : true previousIndex: 3 nextIndex : 4 Grades: E hasPrevious : true hasNext : false previousIndex: 4 nextIndex : 5