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Word Frequency Counter Help

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Join Date: Dec 2006

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the jaguar the jaguar is offline

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Word Frequency Counter Help

Dec 6th, 2006

I need help making a word frequency counter that also gives percentages of the amount of time the character occured. I am having trouble compiling my program. Thanks.

 Help with Code Tags 
 Java Syntax (Toggle Plain Text) 
import java.util.*;
 
public class GoodLetterCounter
 {
   public static void main(String[] args)
   {
 
     System.out.println("\n-This program will show how many times" +
                          " the character showed up in the string.-" );
 
 
      System.out.println("");
 
     Scanner keyboard = new Scanner(System.in);
 
      int charCount = 0;
 
      System.out.print("Please enter a string: ");
      String userString = keyboard.nextLine();
      System.out.print("Please enter a character that was in the string: ");
      char userChar = keyboard.nextLine().charAt(0);
 
 
 
      for(int i= 0;i<userString.length();i++)
      {
              if (userString.charAt(i) == userChar)
                  {
                  charCount++;
                  }
      }
      System.out.println("\nThe character " +"\"" + userChar +
                          "\" appeared " + charCount+ " times." );   
 
      System.out.println("the frequency was" + charCount/userString + "%");           
 
    }
}
import java.util.*;

public class GoodLetterCounter
 {
   public static void main(String[] args)
   {
      
     System.out.println("\n-This program will show how many times" +
                          " the character showed up in the string.-" );
                          
     
      System.out.println("");
     
     Scanner keyboard = new Scanner(System.in);
      
      int charCount = 0;
      
      System.out.print("Please enter a string: ");
      String userString = keyboard.nextLine();
      System.out.print("Please enter a character that was in the string: ");
      char userChar = keyboard.nextLine().charAt(0);
      
      
                     
      for(int i= 0;i<userString.length();i++)
      {
              if (userString.charAt(i) == userChar)
                  {
                  charCount++;
                  }
      }
      System.out.println("\nThe character " +"\"" + userChar +
                          "\" appeared " + charCount+ " times." );   
      
      System.out.println("the frequency was" + charCount/userString + "%");           
                
    }
}

Last edited by the jaguar; Dec 6th, 2006 at 3:59 pm.

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Dukane

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Re: Word Frequency Counter Help

Dec 6th, 2006

The last line when you try to detemine the percentage, you are dividing a character by a String. You can't do that!

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Dukane

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Re: Word Frequency Counter Help

Dec 6th, 2006

You'll also notice that once you fix the bottom line, that you are doing integer division, so the result will be an integer -- either 0 or 1. You need to do floating point division in order to get a percentage. And you also forgot to multiply by 100.

Other than that, I was able to get the program working just fine.

Last edited by Dukane; Dec 6th, 2006 at 4:00 pm. Reason: added to it

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Re: Word Frequency Counter Help

Dec 6th, 2006

•

Originally Posted by Dukane

The last line when you try to detemine the percentage, you are dividing a character by a String. You can't do that!

Is there a way that I can type cast it?

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the jaguar the jaguar is offline

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Re: Word Frequency Counter Help

Dec 6th, 2006

I found a way to fix my previous problem. But now I want to limit the decimal place to 2 places and make a variable for frequency.
Also instead of typing in one character to see its frequency, I want to see all letters occurence and frequencies and the program should stop when the user enters something other than a letter (no white space). Some how I keep getting compiler errors.
Thanks

 Help with Code Tags 
 Java Syntax (Toggle Plain Text) 
import java.util.*;
import java.text.*;
 
public class GoodLetterCounter
 {
   public static void main(String[] args)
   {
 
     System.out.println("\n'This program will return how many times" +
                          " the character you entered showed up in" +
                          " the string you entered'.");
 
      System.out.println("");
 
     Scanner keyboard = new Scanner(System.in);
 
      int charCount = 0;
      String userString = new String();
      float frequency = (charCount * 100/(userString.length()));
 
      do
        {
 
 
          System.out.print("Please enter a string: ");
          userString = keyboard.nextLine();
 
 
          System.out.print("Now enter a character from the string: ");
          char userChar = keyboard.nextLine().charAt(0);
 
 
 
          for(int i= 0; i<userString.length();i++)
              {
                  if (userString.charAt(i) == userChar)
                      {
                      charCount++;
                      }
              }
          System.out.println("\nThe character " +"\"" + userChar +
                              "\" appeared " + charCount+ " times." );   
 
          System.out.println("The frequency was " + frequency + "%");           
 
          System.out.println(""); 
 
         } while (userString.length() != 0);
    }
 
}
import java.util.*;
import java.text.*;

public class GoodLetterCounter
 {
   public static void main(String[] args)
   {
      
     System.out.println("\n'This program will return how many times" +
                          " the character you entered showed up in" +
                          " the string you entered'.");
     
      System.out.println("");
     
     Scanner keyboard = new Scanner(System.in);
      
      int charCount = 0;
      String userString = new String();
      float frequency = (charCount * 100/(userString.length()));
      
      do
        {
          
          
          System.out.print("Please enter a string: ");
          userString = keyboard.nextLine();
          
      
          System.out.print("Now enter a character from the string: ");
          char userChar = keyboard.nextLine().charAt(0);
         
          
                         
          for(int i= 0; i<userString.length();i++)
              {
                  if (userString.charAt(i) == userChar)
                      {
                      charCount++;
                      }
              }
          System.out.println("\nThe character " +"\"" + userChar +
                              "\" appeared " + charCount+ " times." );   
          
          System.out.println("The frequency was " + frequency + "%");           
          
          System.out.println(""); 
                              
         } while (userString.length() != 0);
    }
        
}

Last edited by the jaguar; Dec 6th, 2006 at 5:47 pm. Reason: deleting something.

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Re: Word Frequency Counter Help

Dec 6th, 2006

Sorry for the double post. I don't see a delete option.

Last edited by the jaguar; Dec 6th, 2006 at 5:46 pm.

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Dukane

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Re: Word Frequency Counter Help

Dec 6th, 2006

WHAT are the messages you are getting? Chances are it's telling you what the problem is!

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Re: Word Frequency Counter Help

Dec 6th, 2006

•

Originally Posted by Dukane

WHAT are the messages you are getting? Chances are it's telling you what the problem is!

The compiler isn't giving me any errors now. But when I execute the program it says Exception in thread "main" java.lang.ArithmeticException: /by zero

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Dukane

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Re: Word Frequency Counter Help

Dec 6th, 2006

Alright, so fix that problem and you should be good to go!

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Re: Word Frequency Counter Help

#10

Dec 6th, 2006

•

Originally Posted by Dukane

Alright, so fix that problem and you should be good to go!

I fixed it now, but its not so pretty. Plus I want to see all letters occurence and frequencies. I also the program should stop when the user enters something other than a letter (no white space) or "quit".

 Help with Code Tags 
 Java Syntax (Toggle Plain Text) 
import java.util.*;
import java.text.*;
 
public class GoodLetterCounter
 {
   public static void main(String[] args)
   {
 
     System.out.println("\n'This program will return how many times" +
                          " the character you entered showed up in" +
                          " the string you entered'.");
 
      System.out.println("");
 
     //needed for scanner class
      Scanner keyboard = new Scanner(System.in);
 
      double charCount = 0;
      String userString = new String();
 
      do
        {
 
          // get users string
          System.out.print("Please enter a string: ");
          userString = keyboard.nextLine();
 
          // get users character
          System.out.print("Now enter a character from the string: ");
          char userChar = keyboard.nextLine().charAt(0);
          // tell the user what the program does
 
 
          for(int i= 0; i<userString.length();i++)
              {
                  if (userString.charAt(i) == userChar)
                      {
                      charCount++;
                      }
              }
          System.out.println("\nThe character " +"\"" + userChar +
                              "\" appeared " + charCount+ " times." );   
 
          System.out.println("The frequency was " 
                              + charCount * 100/(userString.length()) + "%");           
 
          System.out.println(""); 
 
         } while (userString.length() != 0);
    }
 
}
import java.util.*;
import java.text.*;

public class GoodLetterCounter
 {
   public static void main(String[] args)
   {
      
     System.out.println("\n'This program will return how many times" +
                          " the character you entered showed up in" +
                          " the string you entered'.");
     
      System.out.println("");
     
     //needed for scanner class
      Scanner keyboard = new Scanner(System.in);
      
      double charCount = 0;
      String userString = new String();
            
      do
        {
          
          // get users string
          System.out.print("Please enter a string: ");
          userString = keyboard.nextLine();
          
          // get users character
          System.out.print("Now enter a character from the string: ");
          char userChar = keyboard.nextLine().charAt(0);
          // tell the user what the program does
          
                         
          for(int i= 0; i<userString.length();i++)
              {
                  if (userString.charAt(i) == userChar)
                      {
                      charCount++;
                      }
              }
          System.out.println("\nThe character " +"\"" + userChar +
                              "\" appeared " + charCount+ " times." );   
          
          System.out.println("The frequency was " 
                              + charCount * 100/(userString.length()) + "%");           
          
          System.out.println(""); 
                              
         } while (userString.length() != 0);
    }
        
}