To explicitly call the superclass constructor from the subclass constructor, we use super() . It’s a special form of the super keyword. super() can be used only inside the subclass constructor and must be the first statement.
Read moreHow do you call a parameterized constructor from a default constructor?
Use this(); in the first line of the parametrized constructor and it will call your default constructor. Make sure you have default constructor as compiler will not provide one if you declare a parametrized constructor.
Read moreCan constructor be parameters?
Constructors can also take parameters , which is used to initialize attributes.
Read moreCan constructor pass parameters?
You can use any data type for a parameter of a method or a constructor. This includes primitive data types, such as doubles, floats, and integers, as you saw in the computePayment method, and reference data types, such as objects and arrays.
Read moreCan a constructor have a parameter list?
Default constructors typically have no parameters, but they can have parameters with default values .
Read moreIs Empty constructor necessary?
An empty constructor is needed to create a new instance via reflection by your persistence framework . If you don’t provide any additional constructors with arguments for the class, you don’t need to provide an empty constructor because you get one per default.
Read moreWhat is the use of empty constructor?
Empty constructor just gives you an instance of that object . You might use setters on it to set necessary properties.
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