单例模式

单例模式：

public class Single {
    private static final Single single = new Single();
    
    private Single(){
        
    }
    
    public static Single sharedSingle(){
        return single;
    }
    
    public void doSomething(){
        System.out.println("TODO:");
    }

    /**
     * @param args
     */
    public static void main(String[] args) {
        Single.sharedSingle();
        // TODO Auto-generated method stub
        Single.sharedSingle().doSomething();
    }
}