Does a constructor has the same name as the class?
Does a constructor has the same name as the class?
Constructors have the same name as the class–the name of the Rectangle class’s constructor is Rectangle() , the name of the Thread class’s constructor is Thread() , and so on. Java supports method name overloading so a class can have any number of constructors all of which have the same name.
Can a class call its own constructor?
No, you cannot call a constructor from a method. The only place from which you can invoke constructors using “this()” or, “super()” is the first line of another constructor. If you try to invoke constructors explicitly elsewhere, a compile time error will be generated.
Can a class constructor be called more than once?
Constructor is called automatically when we create an object using new keyword. It is called only once for an object at the time of object creation and hence, we cannot invoke the constructor again for an object after it is created.
What is it called when a class has two constructors?
There are 2 constructors as it shows the concept of constructor overloading: Having more than 1 constructor(same name and return type(constructor has class type as its default return type)) but with different parameters(different signature)
Why a constructor name is same as class name?
Every class object is created using the same new keyword, so it must have information about the class to which it must create an object. For this reason, the constructor name should be the same as the class name.
What will happen if method name and constructor name are same?
Yes, It is allowed to define a method with the same name as that of a class. There is no compile-time or runtime error will occur. Normally the constructor name and class name always the same in Java.
How do you call a constructor from another constructor in the same class?
Constructor chaining in Java is a technique of calling one constructor from within another constructor by using this and super keywords. The keyword “this” is used to call a constructor from within another constructor in the same class.
Is it possible to call a constructor from another within the same class not from a subclass )? If yes how?
Yes, any number of constructors can be present in a class and they can be called by another constructor using this() [Please do not confuse this() constructor call with this keyword]. this() or this(args) should be the first line in the constructor. This is known as constructor overloading.
How many times is a constructor called?
How many times can a constructor be called during lifetime of the object? As many times as we call it. Only once. Depends upon a Project Setting made in Visual Studio.NET.
Can two constructors have the same name?
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.
What is a Java constructor?
A constructor in Java is a block of code similar to a method that’s called when an instance of an object is created. Unlike methods, constructors are not considered members of a class. A constructor is called automatically when a new instance of an object is created.
How do we define a constructor when class name is?
A constructor has the same name as the class and no return value. Typically, constructors have public accessibility so that code outside the class definition or inheritance hierarchy can create objects of the class. But you can also declare a constructor as protected or private .
