LinkedHashMap

逆序遍历LinkedHashMap

import java.util.*;

public class Test {
    public static void main(String[] args) {
        Map<String,Object> linkedHashMap = new LinkedHashMap<>(16);
        for (int i = 0; i < 10000; i++) {
            linkedHashMap.put(i + "", i);
        }
        for (Map.Entry entry : linkedHashMap.entrySet()) {
            System.out.println("key:" + entry.getKey() + ",value:" + entry.getValue());
        }

        System.out.println("============================");

        // 使用的是迭代器 ListIterator
        ListIterator<Map.Entry> i=
                new ArrayList<Map.Entry>(
                        linkedHashMap.entrySet()).listIterator(linkedHashMap.size());
        while(i.hasPrevious()) {
            Map.Entry entry=i.previous();
            System.out.println("key:" + entry.getKey() + ",value:" + entry.getValue());
        }
    }
}