WebOct 14, 2016 · 5 Answers Sorted by: 311 When multiple threads need to check and change the boolean. For example: if (!initialized) { initialize (); initialized = true; } This is not thread-safe. You can fix it by using AtomicBoolean: if (atomicInitialized.compareAndSet (false, true)) { initialize (); } Share Improve this answer Follow WebExecutionAndPublication 2: Locks are used to ensure that only a single thread can initialize a Lazy instance in a thread-safe manner. Effectively, the initialization method is executed in a thread-safe manner (referred to as Execution in the field name).Publication of the initialized value is also thread-safe in the sense that only one value may be …
Java Enum static method thread safety? - Stack Overflow
WebJun 26, 2024 · Improve this answer. Follow. answered Jun 25, 2024 at 13:53. Alex Dresko. 5,125 3 37 57. 2. This doesn't prove that the IEnumerable extension methods are not thread-safe. Your program would have the same behavior even if the Where operator was thread-safe. You don't mutate the collection (the ages ), you mutate an independent … WebAug 16, 2012 · However, if valueOf () is not thread-safe, this will not work in a concurrent environment. The same applies to using a (normal) Map object and probably these two alternatives are variants of the same pattern, since enum.valueOf () is apparently based on. in the Class.java class. The enumConstantDirectory () method, every time invoked, … short sleeve heavyweight t shirt
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WebJun 4, 2012 · Apparently, the enumeration of Vector isn't fail-fast. Thread-safety obviously involves multiple threads somehow. Vector is thread-safe only in the sense that its operations (like add, get, etc.) are synchronized. This is to avoid non-deterministic behaviour when one thread is adding an element while at the same time another thread is trying to ... WebJan 24, 2024 · Yes, flag enums are a valid design, no problem with that. But I am afraid that the consequence is that enum types are providing less value (in terms of type safety) than they could. Maybe language designers should treat enum types as one thing and bitfields (called flag enums in C#) as a different thing, using different constructs in the language. WebApr 4, 2024 · If both above cases are no problem for anybody, the enum is probably the best choice. Anyways, on a side note, after compilation, java enums are converted to … short sleeve henley- heather grey