Classwork(CW): Class Diagrams

Mapping the House

Objective: Translate Java source code into a visual UML Class Diagram using Mermaid syntax.

Source Code

Analyze the following Java classes. Look closely at how the classes relate to one another. Pay attention to inheritance (subclassing) and composition (one class containing another).

// The Base Class
public class Room {
    public int squareFeet;
    private String wallpaperColor; 
}

// The Subclass
public class Kitchen extends Room {
    public boolean hasDishwasher;
}

// The Container Class
public class House {
    public String address;
    public Room masterBedroom; 
}

Instructions

1. Navigate to Mermaid.live.
2. In the left-hand code editor, use the classDiagram syntax to recreate these three classes.
3. Requirements for your diagram:
   • Show public variables using the + symbol.
   • Show the private variable using the - symbol.
   • Represent the Inheritance relationship (Kitchen is a Room) using <|--.
   • Represent the Composition relationship (House has a Room) using *--.

Syntax Reminders

Relationship	Mermaid Syntax	Description
Inheritance	Parent < | -- Child
Composition	Container *-- Contained	“Has a” (ownership) relationship
Public	+	Visible to all
Private	-	Hidden/Internal

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Check-off Criteria

To get credit for this activity, please raise your green popsicle once your diagram on Mermaid.live matches the following:

• All 3 classes (House, Room, Kitchen) are present.
• Kitchen points to Room with an inheritance arrow.
• House connects to Room with a composition diamond.
• wallpaperColor is correctly marked as private.