title: Comparing two strings in java character by character
body: <p>I am beginner in java, I am trying to compare two strings in java char by char and find how many different chars they have by the following code but it doesn't work,</p>
  
  <pre><code>     min is the min between the 2 strings
  
       for(int i=0; i&lt;min-1; i++){
              s1 = w1.substring(j,j++);
              s2 = w2.substring(j,j++);
  
              if (! s1.equalsIgnoreCase(s2) ){
                  counter++;    
              }
        }`
  </code></pre>
  
  <p>Any tips? </p>