个人项目改进

标签：

新添加在命令行输入：

public class CountOccurrenceOfWords { 
  public static void main(String[] args) throws Exception {
         Map hashMap = null;
         BufferedReader infile = null;
         StringTokenizer st = null;
         String filename;
         Scanner sc = new Scanner(System.in);
         System.out.println("请输入文件名：");
         filename = sc.nextLine();
         File file1 = new File(filename);
        
         String string;
         String file = null;
         //打开一篇文章，名字是 Test.txt .
         infile = new BufferedReader(new FileReader(filename));
         while ((string = infile.readLine()) != null) {
             file += string;  //都出整篇文章，存入String中。
 
         }
 
         hashMap = new HashMap();
       
          // 取出文章中的单词，"," "." "!" " " 为各个单词的分界符。
         st = new StringTokenizer(file, ";: ,.!");
 
         while (st.hasMoreTokens()) {
             String key = st.nextToken();
             if (hashMap.get(key) != null) {
                 int value = ((Integer) hashMap.get(key)).intValue();
                 value++;
                 hashMap.put(key, new Integer(value));
 
             } else {
                 hashMap.put(key, new Integer(1));
             }
         }
      
          //按照单词的字母次序输出。
         Map treeMap = new TreeMap(hashMap);
         Set entrySet = treeMap.entrySet();
 
         Iterator iterator = entrySet.iterator();
 
         while (iterator.hasNext()) {
 
             System.out.println(iterator.next());
         }
 
     } 
 
}

运行示例：

个人项目改进

标签：

原文地址：http://www.cnblogs.com/yinll314/p/5873585.html