map

map的赋值:

 

if (map.get(key) == null)

{

	map.put(key, 1);

}

else

{

	map.put(key, map.get(key) + 1);

}

map的遍历:

 

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

Iterator iter = map.entrySet().iterator();

while (iter.hasNext())

{

	Map.Entry<String, Integer> entry = (Entry<String, Integer>) iter.next();

	String key = entry.getKey();

	int val = entry.getValue();

}

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