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What is the role of the constructor?

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Anonymous

10y ago
Updated: 8/21/2019

Several meanings for "constructor". In object-oriented programming, it is the subroutine used to create an object. The programmer can add commands here, to get the object ready for his needs; for example, initialize the variables used in the object.

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10y ago

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Related Questions

Default constructor in java?

If you don't type a constructor into your class code, a default constructor will be automatically generated by the compiler. The default constructor is ALWAYS a no-arg constructor. (Obviously the compiler has no clue what all arguments you might want for your class. So it takes the safe way out with a no argument constructor) A no-arg constructor is not necessarily the default (i.e., compiler-supplied) constructor, although the default constructor is always a no-arg constructor. The default constructor is the one the compiler provides! While the default constructor is always a no-arg constructor, you're free to put in your own no-arg constructor.


What is an empty constructor?

An empty constructor takes no arguments and calls the default constructor


What is the difference between implicit and explicit call of constructor in c plus plus?

An implicit constructor call will always call the default constructor, whereas explicit constructor calls allow to chose the best constructor and passing of arguments into the constructor.


When a object is passed to a function as argument why it is not generating an error if the parameterized constructor is defined and not the default constructor?

default constructor is used only when the programmer does not use a constructor to initialize objects. Once the programmer defines a constructor then the default constructor is no longer used


Can you call constructor?

yes we can call constructor


What is use of constructor in java?

Constructor is used to do something (written in constructor) immediately after object creation.


What is a default parameterized constructor?

There is no such thing as a default parameterized constructor. The default constructor is always the 'no-arg' constructor and does not take any parameters or arguments as input


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( ) ").


How do you get a default constructor?

The default constructor is an empty (only call the super constructor) with no parameters constructor inserted by the java compiler when you don't define a constructor in your class. If you write something like this: public class NoConstructorClass{ //no constructor goes here } Then you get something like this: public class NoConstructorClass{ public NoConstructorClass(){ // Default constructor that you didn't write super(); } }


What is another name of default constructor?

No-Arg 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.


How many kinds of constructor in java?

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