Parameters are added to a constructor in the same way that they are added to a method, just declare them inside the parentheses after the constructor's name.

Most often, you will need a constructor that accepts one or more parameters. It is called when an instance of the class is created. Java constructors are invoked when their objects are created. It is treated as a special member function because its name is the same as the class name. In Java, every time the new keyword is used to. Constructors are special member functions whose task is to initialize the objects of its class. You would call constructor to initialize objects as follows In Java, a constructor is a block of codes similar to the method. Constructors are like normal methods within the class but are used to initialize the object of the class. Java allows two types of constructors namely −Īs the name specifies the no argument constructors of Java does not accept any parameters instead, using these constructors the instance variables of a method will be initialized with fixed values for all objects. Syntaxįollowing is the syntax of a constructor − However, once you define your own constructor, the default constructor is no longer used. A constructor of class is automatically executed. Typically, you will use a constructor to give initial values to the instance variables defined by the class, or to perform any other start-up procedures required to create a fully formed object.Īll classes have constructors, whether you define one or not, because Java automatically provides a default constructor that initializes all member variables to zero. The task of a constructor in Java is to initialize instance variables of an object. However, constructors have no explicit return type. Every class has a constructor either implicitly or explicitly. It has the same name as its class and is syntactically similar to a method. A constructor is a special method that is used to initialize an object. A constructor initializes an object when it is created.

Constructor in java