Limiting loop in boolean string

Here is my codes

Code:

---

    public boolean stringE(String str)
    {
       
        boolean result = false;

        int len = str.length();
        for (int i = 0; i < len; i++)
        {
        String word = str.substring(0);
        if (word.contains("e"))
        result = true;
     

        }
        return result;
    }

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How do I make it so if it read more than 3 e then it false.

use an int counter variable, say call it eCounter, and count the number of e's.

So, i should not use string in this code?

Myself, I'd convert the String to a char array via a String class method, that does just this, then iterate through each char in a for loop, checking to see if the char is an 'e' or not.

So I convert the string to charArray and try to count it, i still have problem

Code:

---

char[] letter = str.toCharArray();
        int[] count = new int[255];

        for(int i = 0; i < letter.length; i++) {
              count[letter[i]]++;
              if(count[letter[i]] > 3)
                return false;
        }
        return true;

---

This is my error

Code:

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--------------------------------------------------------------------------------
  X stringE("Hll")-> expected:<false> but was:<true>
  X stringE("")-> expected:<false> but was:<true>
--------------------------------------------------------------------------------

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Please outline for those of us not in the know, just what the ultimate goal of this program is? To count 'e's? to count frequencies of all letters?

Regardless, you will not be able to just return out of the for loop if a letter is encountered, but rather you'll probably need to loop through the entire string and depending on the results, choose the proper return boolean value.

I'm taking Intro to Java class and this is what I was given to do

Code:

---

    *  Write the function stringE.
    * 
    *  @param
    *  @return
    * 
    *  Return true if the given string contains
    *  between 1 and 3 'e' chars (inclusive).

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I've often found that the key to figuring out the algorithm here is to do it on paper first.

Get lots of paper, write several words, and step through the words figuring out if they'd be rated true or false, and in the mean time being very cogniscent of each step you take to make this determination. Then write down those steps in English, and finally translate to Java. It helps, trust me.