Private Constructors

Prevent your generic 'Utils' classes from being instantiated:

/**
 * Template for a Utils class full of Static methods.
 * Declare the class as Final so it cannot be subclassed.
 */
public final class MyUtils {
    
    /**
     * Provide a Private constructor to prevent instantiation.
     * 
     * Use Assertions (if enabled) or throw an Error in case of 
     * an attempt is made to instantiate within the class itself.
     */
    private MyUtils() {
        assert false;
        // OR
        throw new AssertionError();
    }

}