Check to if a class is an interface in Java

/*from  w  w w  .  j a  v a  2 s .  c  o  m*/
import java.io.Serializable;

public class Main {
  public static void main(final String[] args) {
    isInterface(Class.class);
    isInterface(Comparable.class);
    isInterface(Serializable.class);
    isInterface(Integer.class);
    isInterface(int.class);
    isInterface(Float[].class);
    isInterface(String.class);
    isInterface(double[].class);
    isInterface(boolean.class);

  }
  /** 
   * Demonstrates usage of <tt>isInterface</tt> from Class.
   *
   * @param dataType The data type to check.
   *
   * @throws NullPointerException If the user passes null for dataType.
   */
  public static void isInterface(final Class dataType) {
    if (dataType == null) {
      throw new NullPointerException();
    }
    if (dataType.isInterface()) {
      System.out.println(dataType.getName());
    }
  }
}