concurrenthashmap
Performance of ConcurrentHashMap.putIfAbsent
In his talk about Effective Java at 54:15 Joshua Bloch recommends to use get before putIfAbsent in order to improve performance and concurrency. This leads me to the question why this optimization is[详细]
2023-02-25 18:07 分类：问答What are the benefits of ConcurrentSkipListMap? [duplicate]
This question already has answers here: Closed 10 years ago. Possible Duplicate: 开发者_运维百科When should I use ConcurrentSkipListMap?[详细]
2023-02-19 05:55 分类：问答Does ConcurrentLRUCache/HashMap ever touch disk?
A lot of 开发者_JAVA百科disk activity while I warm my cache up. I can\'t determine if the org.apache.lucene ConcurrentLRUCache is doing it or not? (The class in questionuses the Java ConcurrentHashMap[详细]
2023-02-09 07:40 分类：问答Java Synchronization with db values
I was given a code, it creates a unique id based on the user name and the service type. The unique id is in db , db is read via DAO classes which i cant see. it takes lot of steps to create the id.[详细]
2023-02-08 15:09 分类：问答Can "CopyOnWriteArrayList" and "ConcurrentHashMap" be serialized?
I have a class teleport by using RMI.But I am not sure those thread-safe object can be serialized.Does anyone tried before?[详细]
2023-02-08 12:04 分类：问答Updating a map from a high-rate data flow
I have a multi-threade开发者_如何转开发d Java application where a method [update(key, value)] updates a ConcurrentHashMap. For each key there will be more values received than can be put in the map an[详细]
2023-02-06 18:42 分类：问答Does a concurrent hashmap not require synchronized getters/setters?
If i was using a concurrent hashmap and i had methods which set and got values, as im using a concurrent hashmap would i need to make the getter and setter synchronized? Is this redundant? Is one desi[详细]
2023-02-04 17:32 分类：问答Use of ConcurrentHashMap eliminates data-visibility troubles?
I\'ve read through Java Concurrency in Practice and am left with this question:when I use a ConcurrentHashMap, what data concurrency issues discussed in Part One of the book do I still need to worry a[详细]
2023-02-01 21:44 分类：问答Java ConcurrentHashMap atomic get if present
How do you perform a safe get if present operation on a Concurrent Hash Map? (same thing like putIfAbsent)[详细]
2023-01-28 03:30 分类：问答Should you check if the map containsKey before using ConcurrentMap's putIfAbsent
I have been using Java\'s ConcurrentMap for a map that can be used from multiple threads. The putIfAbsent is a great method and is much easier to read/write than using standard map operations. I have[详细]
2023-01-16 17:13 分类：问答
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