Inheritance - Java Software Solutions: Foundations of Program Design - page 450

The super Reference
The reserved word super can be used in a class to refer to its parent
class. Using the super reference, we can access a parent's members.
Like the this reference, what the word super refers to depends on
the class in which it is used.
One use of the super reference is to invoke a parent's constructor. Let's look
at an example. Listing 9.4 shows a modification of the original Words program
from Listing 9.1. Similar to the original version, we use a class called Book2

KEY CONCEPT
A parent's constructor can be
invoked using the super reference.

LISTING 9.4

//********************************************************************
// Words2.java Author: Lewis/Loftus
//
// Demonstrates the use of the super reference.
//********************************************************************

public class Words2
{
//-----------------------------------------------------------------
// Instantiates a derived class and invokes its inherited and
// local methods.
//-----------------------------------------------------------------
public static void main (String[] args)
{
Dictionary2 webster = new Dictionary2 (1500, 52500);

System.out.println ("Number of pages: " + webster.getPages());

System.out.println ("Number of definitions: " +
webster.getDefinitions());

System.out.println ("Definitions per page: " +
webster.computeRatio());
}
}

OUTPUT

Number of pages: 1500
Number of definitions: 52500
Definitions per page: 35.0