Adding another Class

Classic programmed-learning exercises, refreshed for modern Java and presented in the current MrStyner.com portfolio style.

Modern Java noteThis archive has been refreshed for Java 25 LTS. Core language concepts remain useful, while outdated setup instructions and browser-era Java are labeled or replaced. Java 26 is the current feature release; Java 25 is used here as the stable teaching baseline.

Answer:

interface Taxable
{
  final double taxRate = 0.06 ;
  double calculateTax() ;
}

Adding another Class

Since taxRate is a constant, it must be set to a value, here, 6 percent. Here is a partial definition of Toy. Recall that it:

  • Has a parent, Goods.
  • Adds a variable, minimumAge.
  • Is taxable.
class Toy extends Goods  
{
  int minimumAge;

  Toy( String des, double pr, int min)
  {
    super( des, pr );
    minimumAge  = min ;
  }

  void display()
  {
    super.display() ;
    System.out.println( "minimum age: " + minimumAge );
  }

  public double   // implementing the interface
  {
    return price *  ;
  }
}

QUESTION 11:

Fill in the blanks. Click here for a

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