Strategy Pattern

Problem scenario: Suppose we have three types of characters in a GameApp:

1. Knight: Attacks with a sword; uses 3 strategies to defend (shield, dodge, magic barrier)
2. Wizard: Casts spells; uses magic barrier to defend
3. Archer: Shoots arrows; uses dodge to to defend

Implement two types of Strategy:

A. DefenseStrategy

1. Shield
2. Dodge
3. CreateMagic

B. AttackStrategy

1. CastSpell
2. ShootArrow
3. SwingSword

UML Class Diagram