Specifications

Sun Services

Java™ Programming Language

Module 6, slide 28 of 43

Invoking Parent Class Constructors

• To invoke a parent constructor, you must place a call to

super in the first line of the constructor.

• You can call a specific parent constructor by the

arguments that you use in the call to super.

• If no this or super call is used in a constructor, then

the compiler adds an implicit call to super() that calls

the parent no argument constructor (which could be

the default constructor).

If the parent class defines constructors, but does not

provide a no-argument constructor, then a compiler

error message is issued.