Should I use setters in constructor?
You should not call getters and setters from the constructor. A constructor constructs the specific class in which it is defined. It is its job to initialise the fields because – well – nothing else will. The only way to guarantee initialising the fields is to assign them.
Can a program have multiple constructors?
There can be multiple constructors in a class. However, the parameter list of the constructors should not be same. This is known as constructor overloading.
When to use a constructor or a setter in Java?
Sometimes a constructor with arguments is used, others setter methods are used to set the value of each variable. I know that a constructor initialises an instance variable inside a class once a class is instantiated using the “new” Keyword. But when do we use constructors and when do we use setters?
Do you call getters and setters from the constructor?
You should not call getters and setters from the constructor. A constructor constructs the specific class in which it is defined. It is its job to initialise the fields because – well – nothing else will. The only way to guarantee initialising the fields is to assign them.
How to use public setters and getters in Java?
Note I used two constructors in order to explain a class having multiple constructors and having public setters () and getters () methods in order to access private instance variables: package com.exercise.lecture2; /** * 1) Create a Customer class that has the following attributes: * name, SSN.
Why do you set parameters in a constructor in Java?
Because you write it using less, more elegant and better readable code when you set the values as parameters in a constructor. Moreover, sometimes some fields are indispensable for the object, so a parameter constructor prevents the user from creating an object omitting necessary fields for the object’s functionality.