To prevent Utilities from being instantiated, I’ve declared a private, no-argument (and empty) constructor. Listing 4 presents a small class that demonstrates a number of Utilities methods.

When to use overloaded constructors As you can see, it can make sense to perform constructor overloading even in a simple Java class that that has only two properties. For more complex classes, it's ...

The next class, Employee, is a contrived example of a class in which the extensible class’s constructor calls an overridable method (setSalaryRange()). Employee.java ...