Java Code. Please help me write the code... Test file: Write a program WordLengt

Question

Java Code. Please help me write the code...

Test file:

Write a program WordLengths.java that reads in a file of text, tabulates the number of words of each length, and writes the results to both the screen and a file. The output should consist of the counts (and optionally the percentages) length 10 11 12+ number 270 926 1120 1269 895 670 400 330 202 93 31 68 percent 4.3 14.8 17.9 20.2 14.3 10.7 6.4 5.3 3.2 1.5 0.5 1.1 Use an array to do the tallying, and get the file names from the command line: java WordLengths romeo txt counts.txt Include a usage message to make sure the user enters two file names, and a try-catch block for handling a file that does not exist. You can test your program on romeo.txt For an extra challenge, do the tallying without the punctuation counted (so that words like "hello" and "hello!" would both be considered the same length)

Explanation / Answer

WordLengths.java

--------------------------------

import java.io.File;

import java.io.FileWriter;
import java.io.IOException;
import java.util.HashMap;
import java.util.Scanner;

public class WordLengths {

   public static void main(String[] args) {

       if (args.length != 2) {
           System.out.println("Usage: Please input two files, first one is for input and second one is for output.");
           System.out.println("java WordLengths romeo.txt counts.txt.");
       }

       try {
           System.out.println("input file: " + args[0]);
           System.out.println("output file: " + args[1]);

           File inputFile = new File(args[0]);
           File outputFile = new File(args[1]);

           HashMap<Integer, Integer> wordLengths = new HashMap<Integer, Integer>();

           Scanner sc = new Scanner(inputFile);

           String word = "";
           Integer number = 0;
           Integer length = 0;

           while (sc.hasNext()) {
               word = sc.next();
               if(word.trim().isEmpty())
                   continue;
              
               /*
               for removing any type of punctuation we use \W.
               it preserves only alphabets, digits and alphanumarics.
               */
              
//               System.out.println(word + " - "+word.replaceAll("\W", ""));
               word = word.replaceAll("\W", "");
              
              
               length = word.length();
               if (length >= 12) {
                   length = 12;
               }
              
               number = wordLengths.get(length);
               if (null == number) {
                   number = 1;
               } else {
                   number++;
               }
               wordLengths.put(length, number);
           }

           sc.close();

           //printing analysis
           StringBuilder output = new StringBuilder();
           output.append("Length ");
           for(int i=1; i<=11; i++) {
               // here %5s is for printing spaces with right justification alignment
               output.append(String.format("%5s", i+""));
           }
           output.append(String.format("%5s", "12+"));
           output.append(" ");
          
           output.append("Number ");
           for(int i=1; i<=12; i++) {
               output.append(String.format("%5s", wordLengths.get(i)+""));
           }
          
           //writing output to console
           System.out.println(output.toString());

           //writing output to counts.txt
           FileWriter fw = new FileWriter(outputFile);
           fw.write(output.toString());
           fw.flush();
           fw.close();
          
       } catch (IOException e) {
           System.out.println("Please give proper file names.");
           System.out.println(e.getMessage());
           e.printStackTrace();
       }
   }
}

Console output:

----------------------

java WordLengths remeo.txt counts.txt

input file: romeo.txt
output file: counts.txt
Length   1 2 3 4 5 6 7 8 9 10 11 12+
Number   295 1002 1298 1406 919 473 411 254 109 61 21 26

counts.txt:

----------------------

Length   1 2 3 4 5 6 7 8 9 10 11 12+
Number   295 1002 1298 1406 919 473 411 254 109 61 21 26

Related Questions

Navigate

• Browse (All)
• Browse J
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.