java - 如何实例化以Bill Pugh方法实现的单例类？

嗨，能否有人告诉我如何实例化下面给定的单例课程的正确方法？

    public class BillPughSingleton {

    private BillPughSingleton(){}

    private static class SingletonHelper{
        private static final BillPughSingleton INSTANCE = new BillPughSingleton();
    }

    public static BillPughSingleton getInstance(){
        return SingletonHelper.INSTANCE;
    }
}

最佳答案

尝试：

BillPughSingleton bill = BillPughSingleton.getInstance();