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
Refactor the existing codes using Strategy Pattern:
public class Character {
private String type;
public Character(String type) {
this.type = type;
}
public void attack() {
if (type.equals("Knight")) {
System.out.println("Knight attacks with a sword!");
} else if (type.equals("Wizard")) {
System.out.println("Wizard casts a spell!");
} else if (type.equals("Archer")) {
System.out.println("Archer shoots an arrow!");
}
}
public void defend() {
if (type.equals("Knight")) {
System.out.println("Using a shield to defend!");
System.out.println("Dodgin to avoid attack!");
System.out.println("Creating a magic barrier for defense!"");
} else if (type.equals("Wizard")) {
System.out.println("Creating a magic barrier for defense!"");
} else if (type.equals("Archer")) {
System.out.println("Using a shield to defend!"");
}
}
}
