c#中泛型集合directory和java中map集合对比

c#中directory的基本用法
1、创建及初始化

Dictionary<int, string> myDictionary = new Dictionary<int, string>();

2、添加元素

myDictionary.Add("C#",0);
myDictionary.Add("C++",1);
myDictionary.Add("C",2);
myDictionary.Add("VB",2);

3、查找元素By Key  java中式调用方法keyset放入set集合中，然后利用Iterator迭代器遍历SET

if(myDictionary.ContainsKey("C#"))
{
Console.WriteLine("Key:{0},Value:{1}", "C#", myDictionary["C#"]);
}

4.遍历元素 By KeyValuePair  这是一种关系，和java中的map.entry< , >类似

c# ：

foreach (KeyValuePair<string, int> kvp in myDictionary)
{
Console.WriteLine("Key = {0}, Value = {1}",kvp.Key, kvp.Value);
}

java：

set<map.entry< , >>  entrySet=map.entrySet();
Iterator<map,entry< , >>  it=entryset.iterator();//利用迭代器便利关系map.entry< , >
while(it.hasnext())
{
map.entry< , >  me= it.next();//这是一种关系
me.getkey();
me.getvalue();
}

5、仅遍历键 By Keys 属性

Dictionary<string, int>.KeyCollection keyCol = myDictionary.Keys;
foreach (string key in keyCol/*string key in myDictionary.Keys*/)
{
Console.WriteLine("Key = {0}", key);
}

6、仅遍历值By Valus属性

Dictionary<string, int>.ValueCollection valueCol = myDictionary.Values;
foreach (int value in valueCol)
{
Console.WriteLine("Value = {0}", value);
}