Which is better setter or constructor?
Constructor-based DI fixes the order in which the dependencies need to be injected. Setter-based DI helps us to inject the dependency only when it is required, as opposed to requiring it at construction time. Spring code generation library doesn’t support constructor injection so it will not be able to create proxy.
What does a setter method do?
In computer science, a mutator method is a method used to control changes to a variable. They are also widely known as setter methods. Often a setter is accompanied by a getter (also known as an accessor), which returns the value of the private member variable.
When to use constructor and setter in Java?
Suppose there are 3 properties in a class, having 3 arg constructor and setters methods. In such case, if you want to pass information for only one property, it is possible by setter method only.
What’s the difference between constructor injection and setter injection?
There are many key differences between constructor injection and setter injection. Partial dependency: can be injected using setter injection but it is not possible by constructor. Overriding: Setter injection overrides the constructor injection. Changes: We can easily change the value by setter injection.
What’s the difference between a getter and a setter in Java?
The method that is used to set/modify the value of a private instance variable of a class is known as a setter method and, the method that is used to retrieve the value of a private instance variable is known as a getter method. In the following Java program, the Student (POJO) class has two variables name and age.
What’s the difference between a constructor and a getter?
As you observe, the main difference between constructors and setter/getter methods is − The constructors are used to initialize the instance variable of a class or, create objects. The setter/getter methods are used to assign/change and retrieve values of the instance variables of a class.