title: is it possible to check if a char matches a list of possibilities?
body: <p>For example I know that when checking strings, you can do something like</p>
  
  <pre><code>if (string.matches("a|e|i|o|u|A|E|I|O|U" ) )
  {
     // Then do this code.
  }
  </code></pre>
  
  <p>but is there a way to check if a char matches a list of possibilities?
  or do I have to check one by one, such as</p>
  
  <pre><code>if(char == a || char == e || char == i )
  </code></pre>
  
  <p>...ect.</p>