The constructor ClientDemo(String, int) is undefined

This error message is usually displayed when you try to create an object of a class that doesn't have a constructor with the specified parameters.

To fix this error, you need to add a constructor to the "ClientDemo" class that takes a String and an int as parameters. For example:

public class ClientDemo {
   public ClientDemo(String str, int num) {
      // Constructor code here
   }
   // Other methods and variables can go here
}

Once you've added this constructor, you should be able to create an object of the "ClientDemo" class with a String and an int parameter without any errors.