abdo28/Singleton-Design-Pattern

Singleton-Design-Pattern

// we need first of all to create the singlton instance that will be used alwayes
// it will be a static private type
// it will be equal null at the begining because I need to detect it it is created as opject or not to use on the getInstance method

private  static SwingCalendar instance = null;

// here I will do the method that if used will return the instance opject as per the singleton pattern
// which is getInstance that will create an object if it is the first time calling the method and will return it
// else it will return the already created opject
public static SwingCalendar getInstance(){
    if(instance == null){
        instance = new SwingCalendar();
    }
    return  instance;
}


/**
 * Create and show new calender object
 * Todo: This method logs the object HashCode in a text file, after refactoring the code; show warning message if the HashCode of Calender1 doesn't equal Calender2 HashCode
 */
private void showNewCalender() {
    SwingCalendar sc;
    sc = SwingCalendar.getInstance();
    Util.Logger.log("Object HC: " + sc.hashCode()); // Log Calender hash code

}