class 单{
,,,private volatile static Singleton instance =,空;
,
,,,private 单例(),{
,
,,,}
,
,,,public static Singleton getInstance (), {
,,,,,,,如果(例如==null), {
,,,,,,,,,,,synchronized (Singleton.class), {
,,,,,,,,,,,,,,,如果(==null)实例
,,,,,,,,,,,,,,,,,,,instance =, new 单例();
,,,,,,,,,,,}
,,,,,,,}
,,,,,,,return 实例;
,,,}
}
你真的了解不稳定的关键字吗?
