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Ensures that a class has only one instance and provides a global access point. Sample implementation:
- Kim April 04, 2008public class Singleton {
private static Singleton instance = null;
public static Singleton getInstance() {
synchronized(instance) { // add for thread safe
if (instance == null)
instance = new Singleton();
return instance;
} // add for thread safe
}
protected Singleton() { ... }
// possibly another constructor form
}