【问题】

Ive created a Java program in Eclipse. The program counts the frequency of each word. For example if the user enteredI went to the shopthe program would produce the output1 1 1 2that is 1 word of length 1 (I) 1 word of length 2 (to) 1 word of length 3 (the) and 2 words of length 4 (went,shop).

Ive created this program to read a string entered by the user but Im wanting to adjust the code to read each line of a text file. Any help would be great.

import java.util.Scanner;

public class WordLengthFrequency

{

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));

}

}

}

}

}

【回答】

JAVA直接写很麻烦，用SPL写一个简单的脚本，然后集成进Java就行了，如何集成可以参考

A1：从文本读取字符串

A2：将字符串拆分成单个单词组成的序列

A3：对序列A2按照单词长度分组，并计算每组单词数量