![]() ![]() Moreover, this would have to be done without violating any memory ordering semantics between the problematic threads and other threads.Įven if this could be done, it's not desirable. We would need to stop the "problematic" thread immediately, then wait for all threads to reach a safepoint and then stop them all, and then, while the program is stopped, rewrite the array we would then need to deoptimise any method that touches that array, as it's been compiled for the optimal representation. For example, we could represent an Integer as an int, and the first time we read or assign null, or the first time we compare references, or the first time we synchronize, we change the array's representation.īut that's hard to do efficiently in Java because multiple threads can be accessing the array concurrently. One way this could be done - and, indeed, has been done in some JavaScript compilers, at least for primitives - is to do something that is similar to how the JIT works already: assume code is nice and optimistically do the most optimal thing first, and then deoptimise if and when code first "misbehaves". But it's very hard to do in Java, and it doesn't accomplish what Java users would want. That is, indeed, so obvious that I hope it is also obvious to everyone that that was the first approach explored. Obviously if we can have the second option it is preferable as it frees the programmer from the need to decide ![]() ![]() Learn Programming Java Help ← Seek help here Learn Java Java Conference Videos Java TIL Java Examples JavaFX Oracle JVM LanguagesĬlojure Scala Groovy ColdFusion Kotlin Want to practice your coding?ĭailyProgrammer ProgrammingPrompts ProgramBattles List of useful Frameworks / Libraries / Software If you have any questions, please do not hesitate to ask them! Related Sub-reddits: Some vendors will be supporting releases for longer than six months. If you would like to download Java for free, you can get OpenJDK builds from the following vendors, among others:Īdoptium (formerly AdoptOpenJDK) RedHat Azul Amazon SAP Liberica JDK Dragonwell JDK GraalVM (High performance JIT) Oracle Microsoft With the introduction of the new release cadence, many have asked where they should download Java, and if it is still free. Join us on IRC #reddit-java Where should I download Java? No surveys, no job offers! Such content will be removed without warning.No programming help questions here! These should be posted in /r/javahelp.Do not post tutorials here! These should go in /r/learnjava.Upvote good content, downvote spam, don't pollute the discussion with things that should be settled in the vote count. Please seek help with Java programming in /r/Javahelp! Subreddit rules! These have separate subreddits - see below. Submit Link Submit Text Seek Programming Help News, Technical discussions, research papers and assorted things of interest related to the Java programming language NO programming help, NO learning Java related questions, NO installing or downloading Java questions, NO JVM languages - Exclusively Java ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |