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  • 写一个程序,用于分析一个字符串中各个单词出现的频率,并将单词和它出现的频率输出显示。(单词之间用空格隔开,如“Hello World My First Unit Test”)

    public class Test {  

     

        public void index() { 

          String strWords = "Hello World My First Unit Test";

         

          String[] words_Array = strWords.split(" ");

          Map<String,Integer> words_Map=new HashMap<String, Integer>();

          int arrLength = words_Array.length;

          for(int i=0;i<arrLength;i++){

             if(!words_Map.containsKey(words_Array[i])){

                words_Map.put(words_Array[i], 1);

                System.out.println(words_Array[i]);

                System.out.println("出现");

                System.out.println(words_Map.put(words_Array[i], 1));

                System.out.println("次");

               

             }else{

                int currentNum = words_Map.get(words_Array[i])+1;

                words_Map.remove(words_Array[i]);

                words_Map.put(words_Array[i], currentNum);

                System.out.println(words_Array[i]);

                System.out.println("出现");

                System.out.println(words_Map.put(words_Array[i], currentNum));

                System.out.println("次");

             }

    }

    }

    }  

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  • 原文地址:https://www.cnblogs.com/yf0715/p/5319307.html
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