added factory method sample

factory-method/src/main/java/com/iluwatar/App.java

@@ -0,0 +1,22 @@
+package com.iluwatar;
+
+public class App 
+{
+    public static void main( String[] args )
+    {
+    	Blacksmith blacksmith;
+    	Weapon weapon;
+    	
+    	blacksmith = new OrcBlacksmith();
+    	weapon = blacksmith.manufactureWeapon(WeaponType.SPEAR);
+    	System.out.println(weapon);
+    	weapon = blacksmith.manufactureWeapon(WeaponType.AXE);
+    	System.out.println(weapon);
+    	
+    	blacksmith = new ElfBlacksmith();
+    	weapon = blacksmith.manufactureWeapon(WeaponType.SHORT_SWORD);
+    	System.out.println(weapon);
+    	weapon = blacksmith.manufactureWeapon(WeaponType.SPEAR);
+    	System.out.println(weapon);
+    }
+}

factory-method/src/main/java/com/iluwatar/Blacksmith.java

@@ -0,0 +1,7 @@
+package com.iluwatar;
+
+public interface Blacksmith {
+
+	Weapon manufactureWeapon(WeaponType weaponType);
+	
+}

factory-method/src/main/java/com/iluwatar/ElfBlacksmith.java

@@ -0,0 +1,9 @@
+package com.iluwatar;
+
+public class ElfBlacksmith implements Blacksmith {
+
+	public Weapon manufactureWeapon(WeaponType weaponType) {
+		return new ElfWeapon(weaponType);
+	}
+
+}

factory-method/src/main/java/com/iluwatar/ElfWeapon.java

@@ -0,0 +1,16 @@
+package com.iluwatar;
+
+public class ElfWeapon implements Weapon {
+
+	private WeaponType weaponType;
+
+	public ElfWeapon(WeaponType weaponType) {
+		this.weaponType = weaponType;
+	}
+
+	@Override
+	public String toString() {
+		return "Elven " + weaponType;
+	}
+	
+}

factory-method/src/main/java/com/iluwatar/OrcBlacksmith.java

@@ -0,0 +1,9 @@
+package com.iluwatar;
+
+public class OrcBlacksmith implements Blacksmith {
+
+	public Weapon manufactureWeapon(WeaponType weaponType) {
+		return new OrcWeapon(weaponType);
+	}
+
+}

factory-method/src/main/java/com/iluwatar/OrcWeapon.java

@@ -0,0 +1,16 @@
+package com.iluwatar;
+
+public class OrcWeapon implements Weapon {
+
+	private WeaponType weaponType;
+
+	public OrcWeapon(WeaponType weaponType) {
+		this.weaponType = weaponType;
+	}
+
+	@Override
+	public String toString() {
+		return "Orcish " + weaponType;
+	}
+	
+}

factory-method/src/main/java/com/iluwatar/Weapon.java

@@ -0,0 +1,5 @@
+package com.iluwatar;
+
+public interface Weapon {
+
+}

factory-method/src/main/java/com/iluwatar/WeaponType.java

@@ -0,0 +1,19 @@
+package com.iluwatar;
+
+public enum WeaponType {
+
+	SHORT_SWORD, SPEAR, AXE;
+
+	@Override
+	public String toString() {
+		String s = "";
+		switch(this) {
+		case SHORT_SWORD: s = "short sword"; break;
+		case SPEAR: s = "spear"; break;
+		case AXE: s = "axe"; break;
+		}
+		return s;
+	}
+	
+	
+}