如何在Java中使用SortedMap接口? [英] How to use SortedMap interface in Java?

问题描述

我有一个

 Map<Float, MyObject>

使地图根据浮点数排序的最佳方法是什么?

What is the best way to keep the map sorted according to the float?

SortedMap是最好的答案吗? TreeMap?我该怎么用?

Is SortedMap the best answer? TreeMap? How do I use it?

我只创建一次地图，并经常使用myMap.put()和myMap.get()替换MyObject.

I only create the map once and replace the MyObject frequently using myMap.put() and myMap.get().

推荐答案

我将使用实现SortedMap的TreeMap.正是为此目的而设计的.

I would use TreeMap, which implements SortedMap. It is designed exactly for that.

示例:

Map<Integer, String> map = new TreeMap<Integer, String>();

// Add Items to the TreeMap
map.put(1, "One");
map.put(2, "Two");
map.put(3, "Three");

// Iterate over them
for (Map.Entry<Integer, String> entry : map.entrySet()) {
    System.out.println(entry.getKey() + " => " + entry.getValue());
}

请参见 SortedMap的Java教程页面.
并且此处是与TreeMap相关的教程列表.

See the Java tutorial page for SortedMap.
And here a list of tutorials related to TreeMap.

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