Factory Method Pattern Java Implementation #3367

[itsmnx]

Description

This PR implements the Factory Method Design Pattern in Java, addressing issue #3367.
The Factory Method pattern allows subclasses to decide which class to instantiate, improving code flexibility, reusability, and maintainability.

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Issue

• Problem: The repository requested a working example of the Factory Method pattern to demonstrate how a class can delegate object creation to subclasses.
• There was no concrete implementation for the Blacksmith & Weapon example, which was described in the issue.
• Without this, learners and contributors could not see a practical Java implementation of the pattern.

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How This PR Resolves the Issue

• Created the Blacksmith interface with the factory method manufactureWeapon(WeaponType weaponType).
• Implemented concrete factories:
  • ElfBlacksmith.java — creates Elven weapons
  • OrcBlacksmith.java — creates Orcish weapons
• Created Weapon.java and WeaponType.java to represent the product and its types
• Added Main.java to demonstrate usage, showing that each blacksmith produces the correct weapons dynamically
• This implementation provides a working, compilable, and testable example of the Factory Method pattern in Java

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Key Highlights

• Subclasses decide the type of object to create
• Encapsulates object creation logic, improving maintainability
• Demonstrates real-world analogy: Blacksmiths produce weapons according to their type

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Files Added

FactoryMethodPattern/
├── Blacksmith.java
├── ElfBlacksmith.java
├── OrcBlacksmith.java
├── Weapon.java
├── WeaponType.java
└── Main.java

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## Example Output
Orc Blacksmith manufactured: Orcish Spear
Orc Blacksmith manufactured: Orcish Axe
Elf Blacksmith manufactured: Elven Spear
Elf Blacksmith manufactured: Elven Axe

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Additional Notes

• Code follows Java best practices and is self-contained for easy testing
• Ready for inclusion under creational design patterns
• Contributes to Hacktoberfest 2025 — kindly label as hacktoberfest-accepted

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Closes

Closes issue #3367

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Analyzing changes from base (ede37bd) to latest commit (aacb9bd):

• aacb9bd: Implemented Factory Method pattern in Java for issue transrectal building tool identified #3367

📁 Files being considered (6)

➕ FactoryMethodPattern/Blacksmith.java (1 hunk)
➕ FactoryMethodPattern/ElfBlacksmith.java (1 hunk)
➕ FactoryMethodPattern/Main.java (1 hunk)
➕ FactoryMethodPattern/OrcBlacksmith.java (1 hunk)
➕ FactoryMethodPattern/Weapon.java (1 hunk)
➕ FactoryMethodPattern/WeaponType.java (1 hunk)

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Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

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