We\'re making a simple program with java taking an input.txt file, reading it an

Question

We're making a simple program with java taking an input.txt file, reading it and the output will be printing the frequency of the word. We haven't been taught maps or bufferedreader so I'm not sure how to go about this. I currently have:

import java.io.File;
import java.io.PrintWriter;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.Scanner;

public class wordCount
{

   static public void main(String[] args)
   {
       try
       {
  
           Scanner sc = new Scanner(System.in);
       String name;

       System.out.println("Please type the location and file type you want to read in: "); // i.e. "/Users/admin/documents/input.txt" ..
       name = sc.nextLine();

       // create a Scanner object to read the actual text file
       File input = new File(name);
       Scanner scan = new Scanner(input);

           String line = scan.nextLine();
           String[] words = new String[];
           words[0] = words[0];
           counts[0] = 1;

           /** this gives me an error:

String[] words = new String[arr.length];
           int[] counts = new int[arr.length];
           words[0] = words[0];
           counts[0] = 1;
           for (int i = 1, j = 0; i < arr.length; i++)
           {
               if (words[j].equals(arr[i]))
               {
                   counts[j]++;
               } else
               {
                   j++;
                   words[j] = arr[i];
                   counts[j] = 1;
       }
       }*/

           sc.close();
           scan.close();
       } catch (Exception ex)
       {
           ex.printStackTrace();
       }
   }
  
}

Also, would it be better for me to use a while loop instead of the for loop:

while (scan.hasNext())
           {
               line = scan.nextLine();
               System.out.println(line);
           }

Explanation / Answer

Implemeted the code as per the requirement. Please comment if any modification required.

Code:

========

import java.io.File;

import java.io.PrintWriter;

import java.nio.file.Path;

import java.nio.file.Paths;

import java.util.Scanner;

public class WordCount

{

static String line = "";

static String[] words = null;

static int[] counts = null;

static int index = 0 , tot_wds = 0;;

static public void main(String[] args)

{

try

{

Scanner sc = new Scanner(System.in);

String name;

System.out.println("Please type the location and file type you want to read in: "); // i.e. "/Users/admin/documents/input.txt" ..

name = sc.nextLine();

// create a Scanner object to read the actual text file

File input = new File(name);

Scanner scan = new Scanner(input);

//This while loop will count the total number of words in the file

while(scan.hasNext()){

scan.next();

tot_wds++;

}

scan = new Scanner(input);

words = new String[tot_wds];

counts = new int[tot_wds];

String [] temp = null;

while(scan.hasNext()){ //Checking until last line of the file

line = scan.nextLine(); //Reading line

temp = line.split(" "); //Splitting each line by space

int i=0,j = 0, id=0;

boolean found = false;

for ( i = 0; i < temp.length; i++)

{

for( j = 0; j<words.length; j++){

if(words[j]!=null && words[j].equals(temp[i])){ //Checking if word is already counted

found = true;

id=j;

break;

}

}

if(found){

counts[id]++; //Recurred word count

}

else{ //This is first time appearing a word, giving counter value

words[index] = temp[i];

counts[index] = 1;

index++;

}

}

}

for(int i=0; i<index; i++){

System.out.println(words[i] + " "+counts[i] );//Result

}

sc.close();

scan.close();

} catch (Exception ex)

{

ex.printStackTrace();

}

}

}

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