Write a method called wordLengths that accepts a string for the name of a file a

Question

Write a method called wordLengths that accepts a string for the name of a file as a parameter. Your method should open the given file, count the number of letters in every token in the file, and then output a result diagram of how many words contain each number of letters. For example consider a file containing the following text. Four score and seven years ago This is a different line some Numbers 1 12 13 14 More Data Your method should produce the following output to the console: 1: ** 2: **** 3: ** 4. ****** 5. *** 6: 0 7: * 8: 0 9: * 10: 0 You can create your own sample text files, for testing purposes, but make sure they work correctly. You may assume that no token will have more than 20 characters.

Explanation / Answer

WordLengthTest.java

import java.io.File;
import java.io.FileNotFoundException;
import java.util.HashMap;
import java.util.Scanner;

public class WordLengthTest {

  
   public static void main(String[] args) throws FileNotFoundException {
       Scanner scan = new Scanner(System.in);
       System.out.println("Enter the file name: ");
       String fileName = scan.next();
       wordLengths(fileName);

   }
   public static void wordLengths(String fileName) throws FileNotFoundException{
       Scanner scan = new Scanner(new File(fileName));
       HashMap<Integer, Integer> map = new HashMap<Integer, Integer>();
       String word;
       int max = 0;
       while(scan.hasNext()){
           word = scan.next();
           System.out.println(word);
           if(max < word.length()){
               max = word.length();
           }
           if(map.containsKey(word.length())){
               map.put(word.length(), map.get(word.length())+1);
           }
           else{
               map.put(word.length(), 1);
           }
       }
       for(int i=1; i<=max; i++){
           System.out.print(i+": ");
           if(map.get(i)!=null){
           for(int j=0; j<map.get(i); j++){
           System.out.print("*");
           }
          
       }
           else{
               System.out.print("0");
           }
           System.out.println();
       }
   }

}

Output:

Enter the file name:
D:\input.txt
This
is
a
different
lin
some
Numbers
1
12
13
14
More
Data
1: **
2: ****
3: *
4: ****
5: 0
6: 0
7: *
8: 0
9: *

input.txt

This is a different lin
some Numbers 1 12 13 14
More Data

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