从单词统计看Map

直接看代码：

String str = "Do as I say , not as I do";
		str = str.toLowerCase();
		str = str.replaceAll("[^A-Za-z]", " ");  
		str = str.replaceAll("\\s+", " ");
		String [] s =  str.split("\\s+");
		Map<String,Integer> hashmap = new HashMap<String ,Integer>();
		for(String s1 : s){
			String key = s1;
			if(hashmap.get(key)!=null){
				int value = ((Integer)hashmap.get(key)).intValue();
				value ++ ;
				hashmap.put(s1, value);
			}else{
				hashmap.put(s1, 1);
			}
		}
		for(Map.Entry entry : hashmap.entrySet()){
			System.out.println(entry.getKey()+": "+entry.getValue());
		}