A constructor in Java is a special method that is used to initialize objects. It is called when an object of a class is created and can be used to set initial values for object attributes. A constructor has the same name as the class and does not have a return type. If a class does not have a constructor, the Java compiler automatically creates a default constructor during runtime, which initializes instance variables with default values.
Constructors can also take parameters, which are used to initialize attributes. There are two rules for creating a constructor: the name of the constructor should be the same as the class, and it must not have a return type.
Constructor overloading is a technique of having more than one constructor with different parameter lists. Each constructor performs a different task and is differentiated by the compiler by the number of parameters in the list and their types.
In summary, a constructor in Java is a special method used to initialize objects, and it has the same name as the class. It can take parameters to initialize attributes, and if a class does not have a constructor, the Java compiler creates a default constructor during runtime.
