Design Patterns · question
Question 3 of 45
Explain the Singleton Pattern and when you would use it.
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Re-explain
The Singleton pattern ensures that a class has only one instance and provides global access to that instance.
When to use:
- Database connections
- Logger instances
- Configuration settings
- Thread pools
Basic implementation:
public class Singleton {
private static Singleton instance;
private Singleton() {}
public static synchronized Singleton getInstance() {
if (instance == null) {
instance = new Singleton();
}
return instance;
}
}
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