blocks|key|4673016|text|Map实现不需要保留插入顺序。例如，使用最多的-+HashMap就没有。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4673017|您可以使用java.util.LinkedHashMap，它确实可以。|4673018|4673019|此实现与HashMap的不同之处在于，它维护一个通过其所有条目运行的双向链表。这个链表定义了迭代顺序，这通常是键插入到映射(插入顺序)|blockquote|4673020|
中的顺序|4673021|entityMap|0|LINK|mutability|MUTABLE|url|http://download.oracle.com/javase/6/docs/api/java/util/LinkedHashMap.html^0|0|3|P|7|0|5|N|5|N|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|V|8|@$9|W|A|X|B|C]|$9|Y|A|Z|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|10|8|@$9|11|A|12|B|C]]|D|@$9|13|A|14|1|15]]|E|$]]|$1|H|3|-4|5|6|7|16|8|@]|D|@]|E|$]]|$1|I|3|J|5|K|7|17|8|@]|D|@]|E|$]]|$1|L|3|M|5|6|7|18|8|@]|D|@]|E|$]]|$1|N|3|-4|5|6|7|19|8|@]|D|@]|E|$]]]|O|$P|$5|Q|R|S|E|$T|U]]]]

<code>Map</code> implementations are not required to preserve insertion order. The most used - <code>HashMap</code> does not, for example.

You can use <a href="http://download.oracle.com/javase/6/docs/api/java/util/LinkedHashMap.html" rel="nofollow"><code>java.util.LinkedHashMap</code></a>, which does.

<blockquote>
 This implementation differs from HashMap in that it maintains a doubly-linked list running through all of its entries. This linked list defines the iteration ordering, which is normally the order in which keys were inserted into the map (insertion-order)
</blockquote>

blocks|key|3262885|text|使用LinkedHashMap|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|3262886|entityMap|0|LINK|mutability|MUTABLE|url|http://download.oracle.com/javase/1.4.2/docs/api/java/util/LinkedHashMap.html^0|2|D|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

Use <a href="http://download.oracle.com/javase/1.4.2/docs/api/java/util/LinkedHashMap.html" rel="nofollow">LinkedHashMap</a>

blocks|key|1148160|text|您是在询问如何使容器以自定义顺序返回对象，例如字母顺序，还是您正在寻找插入顺序？其他人已经提出了插入顺序的解决方案。我给他们加分了。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1148161|如果这不是你想要的，我建议你看看SortedMap，TreeMap，NavigableMap和他们的同类。在那里，您可以创建一个自定义的comparator，它将返回您选择的顺序。如果你不做一个比较器，它将默认对键对象进行小于比较。|offset|length|1148162|entityMap|0|LINK|mutability|MUTABLE|url|http://download.oracle.com/javase/6/docs/api/java/util/SortedMap.html|1|http://download.oracle.com/javase/6/docs/api/java/util/TreeMap.html|2|http://download.oracle.com/javase/6/docs/api/java/util/NavigableMap.html|3|http://download.oracle.com/javase/6/docs/api/java/util/Comparator.html^0|0|G|9|0|Q|7|1|Y|C|2|1W|A|3|0^^$0|@$1|2|3|4|5|6|7|T|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|U|8|@]|9|@$D|V|E|W|1|X]|$D|Y|E|Z|1|10]|$D|11|E|12|1|13]|$D|14|E|15|1|16]]|A|$]]|$1|F|3|-4|5|6|7|17|8|@]|9|@]|A|$]]]|G|$H|$5|I|J|K|A|$L|M]]|N|$5|I|J|K|A|$L|O]]|P|$5|I|J|K|A|$L|Q]]|R|$5|I|J|K|A|$L|S]]]]

Are you asking about making the container return objects to you in a custom order, such as alphabetical or are you looking for insertion order? Others have already suggested the solution to insertion order. I've upvoted them.

If that's not what you want may I suggest you look at <a href="http://download.oracle.com/javase/6/docs/api/java/util/SortedMap.html" rel="nofollow">SortedMap</a>, <a href="http://download.oracle.com/javase/6/docs/api/java/util/TreeMap.html" rel="nofollow">TreeMap</a>, <a href="http://download.oracle.com/javase/6/docs/api/java/util/NavigableMap.html" rel="nofollow">NavigableMap</a>, and their ilk. There you can make a custom <a href="http://download.oracle.com/javase/6/docs/api/java/util/Comparator.html" rel="nofollow">comparator</a> which will return to you the ordering of your choice. If you don't make a comparator, it'll default to a less than comparison on the key objects.

How do I get the values of a <code>Map</code> in the way they were declared?

If map's contents are-

<pre><code>Key "Apple" - Value "3"
Key "Banana" - Value "4"
Key "Orange" - Value "8"
</code></pre>

I don't want to get-

<pre><code>Key "Banana" - Value "4"
Key "Apple" - Value "3"
Key "Orange" - Value "8"
</code></pre>

How do I iterate and get the declared order?

Iterating through a map's contents as declared

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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如何以声明的方式获取Map的值？如果地图的内容是-Key "Apple" - Value "3"Key "Banana" - Value "4"Key "Orange" - Value "8"我不想-Key "Banana" - Value "4"Key "Apple" - Value "3"Key "Orange" ...

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