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What are Constructors in Java
A constructor is a function, which would be executed only at the time of creating an object. To receive Constructors Function Homework Help contact us now.
What are the difference between Constructor and a Function
a) A normal function cannot be called as and when we require to call it, but we cannot call a constructor as and when we want
b) Constructor would be executed only once on the object and that too, only at the time of creating the object. A function can be called on an object as many numbers of times as we want
c) Name of the function can be any name, but the name of the constructor must and should be the name of class
d) A constructor will not have any return data type (not even void) whereas a function should have a return data type (at least void).e) The key word static cannot be used with constructors. It is applicable to functions and other variables
f) We know that, when ever JVM encounters the new operator, it creates an object of that class and loads all the non-static members of the class into that object and then, the address of the object is assigned to variable
g) But sometimes other than this happen prior to this when JVM encounters the new operator. Here we can see the function of constructors
Example of Java constructor
A a1 = new A ();
Here A () is a constructor.
This statement means, asking the JVM to create an object of A .class file by executing the constructor A () defined in the A. class file. But note that, till now in our programs, we have not defined any constructors in our programs. Then how can JVM execute a constrictor which is not defined?
We can have a .java file without a constructor, but we can never have .class file without a constructor.
Constructors Function Homework Help