Ad:

Java Discussion Thread
Marked Solved
Views: 2289

Page 1
2
Next

You are currently viewing page 1 of this multi-page discussion thread

Nov 8th, 2007

Making a program that counts the # of characters

Expand Post »

the below program is supposed to read the string you input and count the amount of times that the letter 'a' appears in it. if it doesn't find the letter 'a', it's supposed to tell you that there aren't enough arguments (which i may change to say that "there aren't any 'a' characters or something) but i'm stuck and i don't know exactly what else to do.

Java Syntax (Toggle Plain Text)
//Page 297 Exercise 8.4
//Saying program found x # of this character in string.
 
 
public class Test
 
{
//variables
 
char a = a;
 
{
  public static void main(String[] args)
  {
    if (args.length != 2)
    {
      System.out.println("Not enough arguments");
    }
    else
       {
      Count(args[0], args[1].charAt(0));
       }
  }
 
public static int Count(String str, char a)
{
  int charCount = 0;
 
   System.out.print(str);
   System.out.print(a);
 
  for (int i = 0; i<str.length(); i++)
  {
  if (str.charAt(i) == a)
    {
      charCount ++;
    }
 
  return charCount;
    }
   }
  }
}
//Page 297 Exercise 8.4
//Saying program found x # of this character in string.


public class Test

{
//variables

char a = a;

{
  public static void main(String[] args)
  {
    if (args.length != 2)
    {
      System.out.println("Not enough arguments");
    }
    else
       {
      Count(args[0], args[1].charAt(0));
       }
  }

public static int Count(String str, char a)
{
  int charCount = 0;

   System.out.print(str);
   System.out.print(a);

  for (int i = 0; i<str.length(); i++)
  {
  if (str.charAt(i) == a)
    {
      charCount ++;
    }
    
  return charCount;
    }
   }
  }
}

Similar Threads

Counting specific characters in a string in C
Word Count Help !! in Visual Basic 4 / 5 / 6
Counting all Non-blank Characters in a String in Java
what is the simplest way to output my results in C
function to count vowels in C++

leroi green

Reputation Points: 10

Solved Threads: 0

Junior Poster in Training

Offline

93 posts
since Oct 2007

Permalink

Nov 8th, 2007

Re: Making a program that counts the # of characters

What exactly is the problem? Other than the fact, of course, that the method you're calling returns a value and you are simply ignoring that value, rather than storing it in a variable, evaluating it, then printing either it or the message.

masijade

Moderator

Reputation Points: 1471

Solved Threads: 490

Industrious Poster

Offline

4,043 posts
since Feb 2006

Permalink

Nov 8th, 2007

Re: Making a program that counts the # of characters

... and also that

Java Syntax (Toggle Plain Text)

char a = a;

won't compile...

Ezzaral

Moderator

Featured Poster

Reputation Points: 3239

Solved Threads: 839

Posting Genius

Offline

6,761 posts
since May 2007

Permalink

Nov 8th, 2007

Re: Making a program that counts the # of characters

what should i do about that part that won't compile because i don't see why its going thru on the cmd but then not working

leroi green

Reputation Points: 10

Solved Threads: 0

Junior Poster in Training

Offline

93 posts
since Oct 2007

Permalink

Nov 8th, 2007

Re: Making a program that counts the # of characters

A char literal needs to be in single quotes

Java Syntax (Toggle Plain Text)

char a = 'a';

Ezzaral

Moderator

Featured Poster

Reputation Points: 3239

Solved Threads: 839

Posting Genius

Offline

6,761 posts
since May 2007

Permalink

Nov 8th, 2007

Re: Making a program that counts the # of characters

okay okay, thanx

leroi green

Reputation Points: 10

Solved Threads: 0

Junior Poster in Training

Offline

93 posts
since Oct 2007

Permalink

Nov 8th, 2007

Re: Making a program that counts the # of characters

oh i also just noticed that i totally had the main method in the wrong place. trying to compile now.

leroi green

Reputation Points: 10

Solved Threads: 0

Junior Poster in Training

Offline

93 posts
since Oct 2007

Permalink

Nov 8th, 2007

Re: Making a program that counts the # of characters

now i'm working with the below code that's compiling and going 'sort-of' where i want but the number that it is giving for the amount of times 'a' shows up is strange like 000000111

Help?

Java Syntax (Toggle Plain Text)
public class Test
 
{
	//variables
	char a = 'a';
 
	public static void main(String[] args)
 
	{
		if (args.length < 1)
		{
			System.out.println("Not enough arguments");
		}
		else
		{
			Count(args[0], args[1].charAt(0));
		}
	}
 
	public static int Count(String str, char a)
	{
		int charCount = 0;
 
		System.out.print("The number of character 'a' found is: ");
 
 
		for (int i = 0; i<str.length(); i++)
		{
			if (str.charAt(i) == a)
			{
				charCount ++;
			}
			System.out.print(charCount);			
		}
		return charCount;
	}
}
public class Test

{
	//variables
	char a = 'a';

	public static void main(String[] args)

	{
		if (args.length < 1)
		{
			System.out.println("Not enough arguments");
		}
		else
		{
			Count(args[0], args[1].charAt(0));
		}
	}

	public static int Count(String str, char a)
	{
		int charCount = 0;

		System.out.print("The number of character 'a' found is: ");


		for (int i = 0; i<str.length(); i++)
		{
			if (str.charAt(i) == a)
			{
				charCount ++;
			}
			System.out.print(charCount);			
		}
		return charCount;
	}
}

leroi green

Reputation Points: 10

Solved Threads: 0

Junior Poster in Training

Offline

93 posts
since Oct 2007

Permalink

Nov 8th, 2007

Re: Making a program that counts the # of characters

Have you tried regex? Also an amazing program for Java is Eclipse, with it you wont need to run the program through cmd, although I would recommend that you run it through cmd before you submit your code. Look up Eclipse, it will save you many a frustrated hour.

sb7000

Reputation Points: 10

Solved Threads: 1

Newbie Poster

Offline

5 posts
since Nov 2007

Permalink

Nov 9th, 2007

Re: Making a program that counts the # of characters

why are you printing the count inside the loop?
why are you not doing anything with the returnvalue of the method?

and don't use Eclipse or any other IDE until you know the language. Those things slow down your learning by making you learn the tool and masking your own misunderstanding in places.

jwenting

Team Colleague

Reputation Points: 1658

Solved Threads: 331

duckman

Offline

7,719 posts
since Nov 2004

Page 1
2
Next

This thread is solved

Either the thread starter or a moderator has marked this thread as solved. You can most likely trust the responses and answers given. There is most likely no reason for any further responses to be posted here. If you have a related question, please start a new thread in this forum instead.

This thread is more than three months old

No one has posted to this discussion for at least three months. Please let old threads die and do not reply to them unless you feel you have something new and valuable to contribute that absolutely must be added to make the discussion complete. Otherwise, please start a new thread in this forum instead.

Previous Thread in Java Forum Timeline: I can't understand what's wrong

Next Thread in Java Forum Timeline: help with java

DaniWeb Message

Cancel Changes

User Name
Password