Singleton- oder Fabrikklasse
public class SimpleSingleton {
// Create the single instance, make it available statically, and
// don't let it be redefined.
private static final SimpleSingleton instance = new SimpleSingleton();
// Allow subclasses to override the constructor, if necessary.
protected SimpleSingleton() {
// Whatever...
}
// Accessor only.
public static SimpleSingleton getInstance() {
return instance;
}
// Methods on the object to actually do something useful.
public void doSomething() {
// Whatever
}
}