CODEWITHSUNDEEP
javareflectionconstructor
JAN
JAN

Reputation: 21865

Invoking Constructor using reflection produces NoSuchMethodException

Given class Award : 

public class Award {


    /*
     * 
     */

    // fields of the class 

    Award()
    {
        // some initializations


    }

I'm trying to invoke this constructor from Main :

    try
    {
        Award myAward = Award.class.getConstructor().newInstance();
        myAward.calculateAward(); 
    }

    catch (Exception e) 
    {
       e.printStackTrace();
    }

but it goes into the exception block and produces NoSuchMethodException exception .

What's wrong ?

Thanks !

Upvotes: 1

Views: 615

Answers (2)

Alexis King
Alexis King

Reputation: 43852

According to the Javadoc:

The constructor to reflect is the public constructor of the class represented by this Class object whose formal parameter types match those specified by parameterTypes.

You constructor may need to be public. Add the public keyword before your Award constructor and try again.

Upvotes: 2

Krrose27
Krrose27

Reputation: 1036

The issue is your constructor is not public so you will need to use getDeclaredConstructor().newInstance(); or make the constructor public.

Upvotes: 9

Related Questions