René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"AtomicMarkableReference 不能解决ABA问题","articleBody":"/**\r\n * AtomicMarkableReference则是将一个boolean值作是否有更改的标记，本质就是它的版本号只有两个，true和false，\r\n * 修改的时候在这两个版本号之间来回切换，这样做并不能解决ABA的问题，只是会降低ABA问题发生的几率而已\r\n * @author :  mazh\r\n * @date :  2020/1/17 14:41\r\n */\r\npublic class SolveABAByAtomicMarkableReference {\r\n    private static AtomicMarkableReference atomicMarkableReference =  new AtomicMarkableReference(100,false);\r\n\r\n    public static void main(String[] args)  {\r\n\r\n        Thread refT1 = new Thread(() -\u003e {\r\n            try {\r\n                TimeUnit.SECONDS.sleep(1);\r\n            } catch (InterruptedException e) {\r\n                e.printStackTrace();\r\n            }\r\n            atomicMarkableReference.compareAndSet(100, 101, atomicMarkableReference.isMarked(), !atomicMarkableReference.isMarked());\r\n            atomicMarkableReference.compareAndSet(101, 100, atomicMarkableReference.isMarked(), !atomicMarkableReference.isMarked());\r\n        });\r\n\r\n        Thread refT2 = new Thread(() -\u003e {\r\n            boolean marked = atomicMarkableReference.isMarked();\r\n            try {\r\n                TimeUnit.SECONDS.sleep(2);\r\n            } catch (InterruptedException e) {\r\n                e.printStackTrace();\r\n            }\r\n            boolean c3 = atomicMarkableReference.compareAndSet(100, 101, marked, !marked);\r\n            System.out.println(c3); // 返回true,实际应该返回false\r\n        });\r\n\r\n        refT1.start();\r\n        refT2.start();\r\n    }\r\n}\r\n\r\n个人理解是这样，不知是否正确？\r\n","author":{"url":"https://github.com/itmaaa","@type":"Person","name":"itmaaa"},"datePublished":"2020-01-17T06:57:33.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":8},"url":"https://github.com/626/JavaGuide/issues/626"}