Why is there no default constructor generated if you define an explicit constructor?
class Employee{ String name; int id; //No explicit constructors } Now I can invoke the following statement: Employee e1 = new Employee(); With the above code, the compiler will provide the definition for the constructor Employee(). If I define a single explicit constructor as follows: class Employee{ String name; int id; Employee(String aName){ this.name=aName; } […]
Why is there no default constructor generated if you define an explicit constructor?
class Employee{ String name; int id; //No explicit constructors } Now I can invoke the following statement: Employee e1 = new Employee(); With the above code, the compiler will provide the definition for the constructor Employee(). If I define a single explicit constructor as follows: class Employee{ String name; int id; Employee(String aName){ this.name=aName; } […]
Why is there no default constructor generated if you define an explicit constructor?
class Employee{ String name; int id; //No explicit constructors } Now I can invoke the following statement: Employee e1 = new Employee(); With the above code, the compiler will provide the definition for the constructor Employee(). If I define a single explicit constructor as follows: class Employee{ String name; int id; Employee(String aName){ this.name=aName; } […]
Patterns for subclass constructors that vary the parent class constructor slightly
So, my problem is in the context of an MVC-style approach. The code here is PHP, but I’m hoping this is a design issue independent of it.
Patterns for subclass constructors that vary the parent class constructor slightly
So, my problem is in the context of an MVC-style approach. The code here is PHP, but I’m hoping this is a design issue independent of it.
Query on usage of ‘Window()’ default constructor from java.awt
I had been through this query before asking this question.
Query on usage of ‘Window()’ default constructor from java.awt
I had been through this query before asking this question.
Constructor vs casting operator
I’m programming a library (so I have complete access to all the mentioned classes). Two classes (A and B) are essentially the same and differ only by their implementation, so they can easily be converted into one another.
But I’m asking myself, if converting by passing an argument of type B to one of A‘s constructors or by implicitly casting B into A, is preferable. Two code examples to illustrate:
Constructor vs casting operator
I’m programming a library (so I have complete access to all the mentioned classes). Two classes (A and B) are essentially the same and differ only by their implementation, so they can easily be converted into one another.
But I’m asking myself, if converting by passing an argument of type B to one of A‘s constructors or by implicitly casting B into A, is preferable. Two code examples to illustrate:
Initialize physical resources in constructor
Is it an acceptable practice to initialize physical/external resources from a constructor when the resource is needed for the object to do it’s work?