Tag » Singleton

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The Only Single Instance You Will Ever Need

The most easiest to learn and probably the most widely used design pattern has to be the Singleton pattern right? Well, maybe the latter, but learning how to implement the Singleton design pattern is easy until you start reading about all the problems you can run into with regards to multiple threads creating an instance of your class. 189 altre parole

Java

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Childfree

[Java] Simple thread-safe singleton class

public class threadSafeSingleton {

  //objects in singleton
  private HashMap<String, String> myHashMap = new HashMap<String, String>();
  private static threadSafeSingleton singletonInstance = null;

  protected threadSafeSingleton() {
  }
  
  public static threadSafeSingleton getSingleton() {
    if (singletonInstance == null) {
      singletonInstance = new threadSafeSingleton();
    }
    return singletonInstance;
  }

}
Java