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Constructors are called during object creation.

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13y ago

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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( ) ").


When is the function constructor called?

A constructor is called when a new object is created.


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.


Does Java support copy constructor?

No. Java does not support copy constructor


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.


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.


What is copy constructor in java?

Java, unlike C++ does not support copy constructors.


Can you create a constructor for an interface in java?

NO, we cannot create a contructor for an interface in java.


Why constructor rather than classes in java?

Constructor is not an alternative to class. In Java, you create classes; the classes contain methods - including the constructor, which can be viewed as a special method. If you want to have a constructor, you need a class that surrounds it, so it's not one or the other.


What is a constructor and its mandatory to use constructor in a class?

A constructor is a method that is invoked when an object is created. As to being mandatory, that really depends on the programming language; in the case of Java, each class must have a constructor, however, in many cases Java will automatically provide a default constructor, so you don't really need to program it.