Thread: Help with Java program that counts strings and tallies results

Basically my java program is supposed to calculate the length of each string in anArray. That isn't too much of problem HOWEVER I can't seem to figure out how to collect strings of the same length and have them as a tally. ie. if there is an array of strings "The dog isn't second first" it will print out length of each string "3 3 5 6 5" but also collect the same lengths "3 3", "5 5" and have them as an output: |Value: 3 Tally:2 Value:5 Tally:2| (note: it doesn't have to be in this form). Anyone have any ideas?

[CODE = java]
int anArray[] = new int[max]; //This is just a value i determined earlier that calculated the max length of the array
int sum = 1;
int count = 0;
int i = 0;
String sentence[] = new String[max];
for (count = 0; count < anArray.length; count++) {
System.out.println("Length: " + args[count].length());
//Now it supposed to calculate the sum after every count which is equal. This is a problem as it looks retarded and it is retarded because it doesn't work.
} if (sentence[count]==sentence[count]||
sentence[count]==sentence[count+1]||
sentence[count]==sentence[count+2]||
sentence[count]==sentence[count+3]||
sentence[count]==sentence[count+4]||
sentence[count]==sentence[count+5]){
sum ++;
System.out.println("Tally: "+sum);
}

}
}
[/CODE]

oh right.

int anArray[] = new int[max]; //This is just a value i determined earlier that calculated the max length of the array
int sum = 1;
int count = 0;
int i = 0;
String sentence[] = new String[max];
for (count = 0; count < anArray.length; count++) {
System.out.println("Length: " + args[count].length());
//Now it supposed to calculate the sum after every count which is equal. This is a problem as it looks retarded and it is retarded because it doesn't work.
} if (sentence[count]==sentence[count]|| 
sentence[count]==sentence[count+1]||
sentence[count]==sentence[count+2]||
sentence[count]==sentence[count+3]||
sentence[count]==sentence[count+4]||
sentence[count]==sentence[count+5]){
sum ++;
System.out.println("Tally: "+sum);
}
 
}
}

I'm getting anArray index out of bounds exception even though the length after the for loop still prints out. What I'm also looking for is a method which 1, isn't as retarded as mine, and 2, actually works properly.

Oh I forgot, my array is "the dog isn't first second" I can change it to anything but thats what it is at the moment. The max length is therefore the longest word, which is 6 characters. 4
The error (an unusual one) is split by the for loop after the count reaches 2 (it reads: Exception in thread "main" Length: 5) and then at the bottom line reads:
java.lang.ArrayIndexOutOfBoundsException: 5
at Words.main(Words.java:18)
I can't really make anything of it because the max length is 6 so it shouldn't be out of bounds

Hmm ok. I'll have a think and get back to you. Maybe change some things in my code. Thanks for the help.

--- Update ---

Hey right now I fixed my problem of the exception out of bounds (which is great!) but now I have a another problem:
Exception in thread "main" java.lang.NullPointerException
at Words.main(Words.java:20)
This is what is causing the problem:

if (sentence[0].length() == sentence[0].length()
				|| sentence[0].length() == sentence[1].length()
				|| sentence[0].length() == sentence[2].length()
				|| sentence[0].length() == sentence[3].length()
				|| sentence[0].length() == sentence[4].length()) {
			sum++;
			System.out.println("Tally: " + sum);
		}
	}
}

I made it a bit simpler to understand for now so I took it out of the for loop and replaced count with what it supposed to do for the first loop. Do you suggest any solutions?

Yes you're right. Both my arrays have no Strings in them which is why they don't produce any result. How would I make a new array which uses the strings from (String []args) without being called args?

Originally Posted by Norm

What is wrong with the name: args?

Nothing really actually I just changed my code to args[count].length instead of sentence[count].length. I don't know what I was thinking having arrays with no value.

Use a loop to copy the elements from one array to the other

This sounds REALLY useful! How would I do this in a code?

Sorry I usually understand examples a lot better. Could you show me an example?

OK. Anyway thanks for the help, honestly couldn't do the rest of the code without it!