<p>Some ways to iterate through the characters of a string in Java are:</p>
<ol>
<li>Using <code>StringTokenizer</code>?</li>
<li>Converting the <code>String</code> to a <code>char[]</code> and iterating over that.</li>
</ol>
<p>What is the easiest/best/most correct way to iterate?</p>

I use a for loop to iterate the string and use
```
charAt()
```
to get each character to examine it.  Since the String is implemented with an array, the
```
charAt()
```
method is a constant time operation.
```
```
String s = "...stuff...";

for (int i = 0; i < s.length(); i++){
    char c = s.charAt(i);        
    //Process char
}
```
```
That's what I would do.  It seems the easiest to me.
As far as correctness goes, I don't believe that exists here.  It is all based on your personal style.