Java单例模式

class Singleton{
	private static Singleton instance = new Singleton();
	private Singleton() {		
	}
	
	public void print() {
		System.out.println("Hello, Singleton!");
	}
	
	public static Singleton getInstance() {
		return instance;
	}
}

public class SingleDemo01 {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Singleton s1 = Singleton.getInstance();
		Singleton s2 = Singleton.getInstance();
		Singleton s3 = Singleton.getInstance();
		s1.print();
		s2.print();
		s3.print();
	}

}