implicit super constructor Person() is undefined. Must explicitly invoke another constructor?

by

If a constructor does not explicitly invoke a superclass constructor,
the Java compiler automatically inserts a call to the no-argument
constructor of the superclass.

If the super class does not have a

no-argument constructor, you will get a compile-time error. Object
does have such a constructor, so if Object is the only superclass,
there is no problem.

Reference: http://docs.oracle.com/javase/tutorial/java/IandI/super.html :
(See under section ‘SubClass Constructors’)

So whenever dealing with parameterized constructors make a super(parameter1, parameter2 ..) call to the parent constructor.
Also this super() call should be the FIRST line in your constructor block.

Or else, if a scenario demands, create an additional non-parameterized () constructor in the parent class

More Related Contents:

  1. Calling method from constructor
  2. Why is constructor of super class invoked when we declare the object of sub class? (Java)
  3. When do you need to explicitly call a superclass constructor?
  4. constructor of subclass in Java
  5. Cannot instantiate the type for class object (Java)
  6. how to inherit Constructor from super class to sub class
  7. Java. Implicit super constructor Employee() is undefined. Must explicitly invoke another constructor [duplicate]
  8. Java – public class constructor [duplicate]
  9. java – Explanation on “this” statement [duplicate]
  10. How to resolve an Error on a constructor? [closed]
  11. Private class property visible
  12. Implicit super constructor Event() is undefined [duplicate]
  13. Java synchronized static methods: lock on object or class
  14. How to synchronize a static variable among threads running different instances of a class in Java?
  15. Use of Initializers vs Constructors in Java
  16. Is it possible to call subclasses’ methods on a superclass object?
  17. Can constructor return a null object?
  18. Pros and cons of package private classes in Java?
  19. How can I start a new android activity using class name in a string?
  20. Why do abstract classes in Java have constructors? [duplicate]
  21. Instantiate private inner class with java reflection
  22. Loop over all fields in a Java class
  23. Could not find or load main class with a Jar File
  24. Building a copy constructor in Java
  25. Why do constructors in java not have a return type? [duplicate]
  26. Is doing a lot in constructors bad? [closed]
  27. Java – get the current class name?
  28. What are the purposes of inner classes
  29. maximum size of java class / exception table
  30. Difference between a no-arg constructor and a default constructor in Java

Leave a Comment