Java singleton

public class DB {
    // champs de l'objet

    private DB(){
        // initialisation des champs
    }

    private static final DB INSTANCE = new DB();
    public static DB getInstance(){
        return INSTANCE;
    }
}

Java singleton

public final class SomeSingleton {
   public static final SomeSingleton INSTANCE;

   private SomeSingleton() {
      INSTANCE = (SomeSingleton)this;
      System.out.println("init complete");
   }

   static {
      new SomeSingleton();
   }
}

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