java - 词频循环

Question

此代码的目标是使用 main 方法 java 创建一个程序来分析用户输入的一段文本。

他们通过将文本输入扫描仪来做到这一点，然后由程序进行分析。分析的目的是产生词频、平均长度，并将结果以星号图的形式打印出来，单个“*”代表1个词。

例如“Birds can might Fly”应该输出以下结果:

Enter Text:
Birds can maybe fly
Birds can maybe fly
3 letter words: 2
5 letter words: 2
mean length: 4.0
3 letter words: **
5 letter words: **
Enter Text:

但是我得到了这个

Enter text: 
Birds can maybe fly
Birds can maybe fly
3 letter words: 2
3 letter words: *
mean lenght: 4.0
3 letter words: 2
3 letter words: **
mean lenght: 4.0
5 letter words: 2
5 letter words: *
mean lenght: 4.0
5 letter words: 2
5 letter words: **
mean lenght: 4.0
Enter text: 

有没有办法改变我的代码，使其输出在第一部分中看到的内容，而不是我在第二部分中得到的内容。

代码:

import java.util.Scanner;

public class Freq
{

    public static void main(String[] args)
    {

        Scanner scan = new Scanner(System.in);

        while (true)
        {

            System.out.println("Enter text: ");

            String s;
            s = scan.nextLine();
            String input = s;
            String strippedInput = input.replaceAll("\\W", " ");

            System.out.println("" + strippedInput);

            String[] strings = strippedInput.split(" ");
            int[] counts = new int[6];
            int total = 0;

                for (String str : strings)
                    if (str.length() < counts.length)
                        counts[str.length()] += 1;
                for (String s1 : strings)
                    total += s1.length();   

                for (int i = 1; i < counts.length; i++){    
            StringBuilder sb = new StringBuilder(i).append(i + " letter words: ");
                    for (int j = 1; j <= counts[i]; j++) {


                        sb.append('*');
                        System.out.println(i + " letter words: " + counts[i]);
                        System.out.println(sb);
                        System.out.println(("mean lenght: ") + ((double) total / strings.length));


        }}}}}

Answer 1

你的循环是混合的，所以你打印了太多的东西，而且有时在错误的时间打印。您应该拆分循环。

首先，您只想按长度输出计数:

for (int i = 1; i < counts.length; i++){    
   System.out.println(i + " letter words: " + counts[i]);
}

然后你想输出平均长度:

System.out.println(("mean length: ") + ((double) total / strings.length));

最后你想输出星号:

for (int i = 1; i < counts.length; i++){    
    StringBuilder sb = new StringBuilder(20);
    sb.append(i);
    sb.append(" letter words: ");
    for (int j = 1; j <= counts[i]; j++) {
        sb.append('*');               
    }
    System.out.println(sb);
}