java實現詞頻統計程序

public static void main(String[] args) {
// TODO Auto-generated method stub
		//用HashMap來存儲《單詞：詞頻》這樣一個映射關係
		HashMap<String,Integer>hasMap = new HashMap<>();
		//用正則表達式來過濾字符串的所有標點符號
		String regex ="[【】、.。,\"!--;:?\'\\]]";
		try{
			BufferedReader br = new BufferedReader(new FileReader("F:\\text.txt"));
			String value;
			while((value=br.readLine())!=null){
				value = value.replaceAll(regex," ");
				StringTokenizer tokenizer = new StringTokenizer(value);
				while(tokenizer.hasMoreTokens()){
					String word = tokenizer.nextToken();
					if(!hasMap.containsKey(word)){
						hasMap.put(word,new Integer(1));
					}else{
						int k = hasMap.get(word)+1;
						hasMap.put(word, new Integer(k));
					}
				}
			}
			//遍歷HasMap,輸出結果
			Iterator it = hasMap.keySet().iterator();
			while(it.hasNext()){
				String word = (String)it.next();
				System.out.println(word +":\t"+hasMap.get(word));
			}
		}catch(FileNotFoundException e){
			e.printStackTrace();
		}catch(IOException e){
			e.printStackTrace();
		}
	}