title: How can I create an utility class?
body: <p>I want to create a class with utility methods, for example</p>
  
  <pre><code>public class Util {
  
     public static void f (int i) {...}
  
     public static int g (int i, int j) {...}
  
  }
  </code></pre>
  
  <p>Which is the best method to create an utility class?</p>
  
  <p>Should I use a private constructor?</p>
  
  <p>Should I make the utility class for abstract class?</p>
  
  <p>Should I do nothing?</p>