java regex match for alphanumeric string
<p>I am trying to check whether a password is alphanumeric or not using regex
but I am not getting the result I expect. What is the problem with the below code?</p>

<pre><code>boolean passwordOnlyAlphaNumericCheck = false;
Pattern patternAlphaNumericCheck = Pattern.compile("^[a-zA-Z0-9]$");
Matcher matcherAlphaNumericCheck = patternAlphaNumericCheck.matcher(login.getPassword());
if(matcherAlphaNumericCheck.find())
  passwordOnlyAlphaNumericCheck = true;
</code></pre>

<p>Thanks for help</p>