add singelton class

[Emelie1812]

-add singelton class

Nothing else is changed

Summary by CodeRabbit

Release Notes

• Chores
  • Added internal code infrastructure.

---

Note: This release contains no user-visible changes or new features.

[coderabbitai]

Walkthrough

A new Java source file is added to create a public class Singelton in the com.example package with an empty class body containing no fields or methods.

Changes

Cohort / File(s)	Summary
New class definition src/main/java/com/example/Singelton.java	Adds public class Singelton with empty body in newly created com.example package

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

• Note: The class name Singelton may be a typo of the common design pattern Singleton and should be verified against intended naming conventions.

Poem

🐰 A new class hops into view,
Empty and ready, shiny and new,
Singelton stands in com.example's space,
Though spelling might need a quick trace! 🐇

Pre-merge checks and finishing touches

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title 'add singelton class' directly matches the PR objective of adding a singleton class, accurately summarizing the main change in the changeset.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

✨ Finishing touches

• 📝 Generate docstrings

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment

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[coderabbitai]

Actionable comments posted: 1

📜 Review details

Configuration used: CodeRabbit UI

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 21c51e8 and 2a8b265.

📒 Files selected for processing (1)

• src/main/java/com/example/Singelton.java (1 hunks)

[coderabbitai]

⚠️ Potential issue | 🔴 Critical

This doesn't implement the Singleton pattern.

The class is named "Singelton" (typo: should be "Singleton") and the PR claims to add a singleton, but this implementation lacks the essential components of the Singleton design pattern:

• No private constructor to prevent direct instantiation
• No private static instance field
• No public static getInstance() method

As written, this class can be instantiated multiple times with new Singelton(), which defeats the purpose of a singleton.

Apply this diff to implement a proper thread-safe Singleton pattern:

-public class Singelton {
+public class Singleton {
+    private static Singleton instance;
+    
+    private Singleton() {
+        // Private constructor prevents instantiation
+    }
+    
+    public static synchronized Singleton getInstance() {
+        if (instance == null) {
+            instance = new Singleton();
+        }
+        return instance;
+    }
 }

Alternatively, for a simpler eager initialization approach:

-public class Singelton {
+public class Singleton {
+    private static final Singleton INSTANCE = new Singleton();
+    
+    private Singleton() {
+        // Private constructor prevents instantiation
+    }
+    
+    public static Singleton getInstance() {
+        return INSTANCE;
+    }
 }

Do you want me to help implement the Singleton pattern properly, or would you like guidance on which approach best fits your use case?

📝 Committable suggestion

‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

Suggested change

	public class Singelton {
	}
	public class Singleton {
	private static Singleton instance;
	private Singleton() {
	// Private constructor prevents instantiation
	}
	public static synchronized Singleton getInstance() {
	if (instance == null) {
	instance = new Singleton();
	}
	return instance;
	}
	}

Suggested change

	public class Singelton {
	}
	public class Singleton {
	private static final Singleton INSTANCE = new Singleton();
	private Singleton() {
	// Private constructor prevents instantiation
	}
	public static Singleton getInstance() {
	return INSTANCE;
	}
	}

🤖 Prompt for AI Agents

In src/main/java/com/example/Singelton.java around lines 3-4, the class is
misspelled and does not implement the Singleton pattern; rename the class and
file to Singleton, add a private constructor to prevent external instantiation,
add a private static instance field, and provide a public static getInstance()
method; implement either eager initialization (private static final Singleton
INSTANCE = new Singleton(); public static Singleton getInstance() { return
INSTANCE; }) or a thread-safe lazy initialization (private static volatile
Singleton instance; public static Singleton getInstance() { if (instance ==
null) synchronized(Singleton.class) { if (instance == null) instance = new
Singleton(); } return instance; }) and update references/imports accordingly.