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Overloading a constructor means typing in multiple versions of the constructor, each having a different argument list, like the following examples:
class Car {
Car() { }
Car(String s) { }
}
The preceding Car class has two overloaded constructors, one that takes a string, and one with no arguments. Because there's no code in the no-arg version, it's actually identical to the default constructor the compiler supplies, but remember-since there's already a constructor in this class (the one that takes a string), the compiler won't supply a default constructor. If you want a no-arg constructor to overload the with-args version you already have, you're going to have to type it yourself, just as in the Car example.
Overloading a constructor is typically used to provide alternate ways for clients to instantiate objects of your class. For example, if a client knows the Car name, they can pass that to a Car constructor that takes a string. But if they don't know the name, the client can call the no-arg constructor and that constructor can supply a default name.
Wiki User
∙ 12y ago
Wiki User
∙ 13y agoThe constructor will invoke all constructors in the inheritance hierarchy to ensure that all the parent classes of the current classes get initialized when the current class is instantiated.
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Is constructor overloading same as method overloading.yes or no. explain?
yes,because in constructor overloading constructor have same and different parameter list. In method overloading method have same name and different parameter list.
Operator overloading is possible in java or not?
Java does not support opperator overloading, so the answer to your question is: none.
Does Java support copy constructor?
No. Java does not support copy constructor
Can you initialize an object without constructor in java?
No. if you wish to create an object that you plan on using in a java program then the answer is NO. You cannot initialize an object of a Java class without calling the constructor.
Can a constructor be defined within a method in java?
No.
How many constructor can be defined in a classin java p rogramming?
how many constructer can be defined in class in overloading of java programming
What is the function of this in java?
this in java is a keyword that refers to the current object of the class. It is also used in constructor overloading when you want to invoke one constructor from another within the same class.
Why you use constructor overloading?
When we are initializing our object with different internal state then we can use the constructor overloading.
Is constructor overloading same as method overloading.yes or no. explain?
yes,because in constructor overloading constructor have same and different parameter list. In method overloading method have same name and different parameter list.
What is the method of constructor overloading?
The first thing to note about constructor overloading is that Java creates a no argument constructor for you if and only if you have not typed a constructor yourself. Every class has a constructor even abstract ones (default no argument constructor). Abstract constructors are always executed. To overload a constructor you can do the following: class Test { String name; Test(String n) { name = n; System.out.println("Constructing Test Object named: " + name); } } In the case above we are overloading the default no argument constructor with a constructor that takes a String parameter. You can write you own no argument constructor as follows: class Test { Test() { System.out.println("Constructing Test Object"); } } To override our own no argument constructor we do this: class Test { Test() { // our no argument constructor System.out.println("Constructing Test Object"); } String name; Test(String n) { // overloading our no argument constructor with this // constructor that take a String parameter name = n; System.out.println("Constructing Test Object named: " + name); } }
Operator overloading is possible in java or not?
Java does not support opperator overloading, so the answer to your question is: none.
Does Java support copy constructor?
No. Java does not support copy constructor
What happens when no constructor function is declared in a class - in Java?
When any constructor is deffined in your class, the java compiler create a default no argument constructor for you. This constructor only have an invocation to the super class constructor (" super( ) ").
Differene betwee constructor overloading same as method overloading?
A constructor is just a special form of a method. You can overload constructors in the exact same way as you can overload any other method.
Is there a sample program for constructor?
All Java programs would have a constructor... public class Test { public Test(){ ... } ..... } This is a constructor. Even if you dont code the constructor Java would automatically place a default constructor for compilation.
What is use of constructor in java?
Constructor is used to do something (written in constructor) immediately after object creation.
Discrbe breifly about Copy constructor overloading?
A copy constructor usually refers to a constructor which takes an object, and returns a copy of that object. I can think of no way to overload the constructor without changing its functionality.
