How to create instance of class that have parameterized constructor

Question

One of interviewer asked me this question: How to create instance of class that have parameterized constructor, but i will not send the parameter information. Example:

public class abc{
     public abc(string str)
     {
     }
}

Now if we create instance of it then i have to do it in this way:

abc abcInstance = new abc("xyz");

But he wants that he will not pass parameter eg.:

abc abcInstance = new abc();

Please help me out. Some one suggested Dependency Injection Please share an example. Thanks in advance.

it looks like you are looking for [Constructor chaining](https://stackoverflow.com/a/1814965/2417602)....? — vikscool, Jan 16 '19 at 06:51

score 4 · Accepted Answer · answered Jan 16 '19 at 06:52

4

string is nullable, but you can do this:

public class abc{
     public abc(anyType str = defaultvalue)
     {
     }
}

If anytype is int, use defaultvalue as 0 for example and etc...

answered Jan 16 '19 at 06:52

CodeMan

671
6
13

thanks for your response, but if you can give an example of Dependency Example it will help me. – Raghubar Jan 16 '19 at 07:07

How to create instance of class that have parameterized constructor

1 Answers1