new
keyword.
In utility classes, all fields and methods are static
.
Instantiation of such classes is most likely unnecessary and indicates a mistake.
Example:
class MyUtils {
public static double cube(double x) {
return x * x * x;
}
}
class Main {
public static void main(String[] args) {
// Instantiation of utility class
MyUtils utils = new MyUtils();
}
}
To prevent utility classes from being instantiated,
it's recommended to use a private
constructor.