java - 查找字符串中某个单词的长度，并查找有多少个单词具有该长度。 ( java )

Question

我需要一些帮助来确定单词的长度以及有多少单词具有该长度。例如，如果句子是“我要找到一些字符串长度”，

输出为

Number of String with length 1 is 1

Number of String with length 2 is 2

Number of String with length 4 is 2

Number of String with length 5 is 1

Number of String with length 6 is 1

Number of String with length 7 is 1

到目前为止，我已经得到了这个:

    String word;
    int wordlength;
    int count = 0;

    Scanner inFile = 
            new Scanner(new FileReader("C:\\Users\\Matt\\Documents\\WordSize.txt\\"));

    PrintWriter outFile = 
            new PrintWriter("wordsizes.out");

    while (inFile.hasNext())
    {
        word = inFile.next();

        wordlength = word.length();

        if (count >= 0)
            outFile.println(wordlength);

        count++;
    }

    outFile.close();
        }
}

这只是给出每个单词的长度。

Answer 1

你的输出对我来说没有任何意义。我接下来的事情对你有用。

String str="I am going to find some string lengths";
  String[] arr=str.split(" ");
    Map<Integer,Integer> lengthMap=new HashMap<>();
    for(String i:arr){
        Integer val=lengthMap.get(i.length());
        if(val==null){
           val=0;
        }
        lengthMap.put(i.length(),val+1);
    }
    for(Map.Entry<Integer,Integer> i:lengthMap.entrySet()){
        System.out.println("Number of String with length "+i.getKey()+" is "+i.getValue());
    }

输出

  Number of String with length 1 is 1
  Number of String with length 2 is 2
  Number of String with length 4 is 2
  Number of String with length 5 is 1
  Number of String with length 6 is 1
  Number of String with length 7 is 1