package creationpattern.singletonpattern;

public class SingleObject {
	// SingleObjectΨһ
	private static SingleObject instance /*= new SingleObject()*/;
	
	private SingleObject() {
	}
	
	public static SingleObject getInstance() {
		if(instance == null) {
			synchronized(SingleObject.class) {
				if(instance == null) {
					instance = new SingleObject();
				}
			}
		}
		return instance;
	}
	
	public void showMessage() {
		System.out.println(getClass().getName() + "::showMessage() methond");
	}
}