Delegation Pattern: Functionality Reuse

In this problem, you will create a program that holds a Printer instance as a field of ColorPrinter and reuses printing functionality by delegating processing to it, displaying the result to standard output.

Learning Objective: Understand delegation pattern and reuse functionality through delegation instead of inheritance

Overview

Delegation is a pattern where one object delegates processing to another object. It reuses functionality through "has-a" relationships instead of "is-a" inheritance relationships.

Specifications

Implement a printer system:

1. Printer class:

   • void print(String text) - prints text (outputs "Printing: [text]")

2. ColorPrinter class:

   • Holds Printer instance as private field (delegation)
   • Receives Printer instance in constructor
   • void printInColor(String text, String color) - adds color info and delegates
     • Output "Color: [color]"
     • Delegate actual printing to printer.print(text)

3. Main class:

   • Create Printer instance
   • Create ColorPrinter instance using it
   • Print "Hello World" in "Red"

Output Format

Color: Red
Printing: Hello World