【Question】

I've created a Java program in Eclipse. The program counts the frequency of each word. For example if the user entered'I went to the shop'the program would produce the output'1 1 1 2', that 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').

I've created this program to read a string entered by the user but I want 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));

}

}

}

}

}

 

【Answer】

It’s a hassle to perform the count in Java. You can write a simple script in Java and integrate it into the Java application. About the integration of SPL script and a Java application, see How to Call an SPL Script in Java.

	A
1	=file("d:\\data.txt").read()
2	=A1.words()
3	=A2.groups(len(~):length;count(~):count)

A1: Read in the text file as strings.

A2: Split each string into a sequence of English words.

A3: Group A2 by the length of words and count the words in each group.