This core Java question is followup of previous question and expecting candidate to write Java singleton using double checked locking. Remember to use volatile variable to make Singleton thread-safe. check 10 Interview questions on Singleton Pattern in Java for more details and questions answers 12....
😮 Core Interview Questions & Answers For Experienced Java(Backend) Developers | 互联网 Java 工程师进阶知识完全扫盲:涵盖高并发、分布式、高可用、微服务、海量数据处理等领域知识 - doocs/advanced-java
偏向锁的核心思想是,如果一个线程获得了锁,那么锁就进入偏向模式,此时Mark Word 的结构也变为偏向锁结构,当这个线程再次请求锁时,无需再做任何同步操作,即获取锁的过程,这样就省去了大量有关锁申请的操作,从而也就提供程序的性能。所以,对于没有锁竞争的场合,偏向锁有很好的优化效果,毕竟极有可能连续...
Here are answers to some frequently asked questions: Does Java Usage Tracker affect the private JRE within a JDK, or does it only affect the standalone JRE? If you have a JDK installed in a computer, there is a JRE in the jre subdirectory; this is the private JRE referred to in the ...
java @path1/options @path2/classes Code Heap State Analytics There are occasions when having insight into the current state of the JVM code heap would be helpful to answer questions such as: Why was the JIT turned off and then on again and again? Where has all the code heap space gone...
(documentSelectionMark -> System.out.printf("Selection mark is '%s' and is within a bounding box %s with confidence %.2f.%n", documentSelectionMark.getSelectionMarkState().toString(), documentSelectionMark.getBoundingPolygon().toString(), documentSelectionMark.getConfidence())); }); // tables...
Therefore, based on my daily practical application of this part of learning in the project, I have summarized these 13 related questions and attached detailed answers. Hope it can be helpful to everyone! What is the difference between authentication and authorization?
36.Java String vs StringBuilder vs StringBuffer Concatenation Performance Micro Benchmark 37.Checked vs Unchecked Exceptions 38.try-with-resources 39.Java Serialization 40.Object Construction in Serialization 41.Externalizable vs Serializable 42.serialVersionUID in Java Serialization 43.Customize Default Seri...
题目来源:https://github.com/resumejob/interview-questions ▲ 38 HashMap 与 ConcurrentHashMap 的实现原理是怎样的?ConcurrentHashMap 是如何保证线程安全的? HashMap的实现:(参考:https://yuanrengu.com/2020/ba184259.html) 1、jdk1.7中底层是由数组(也有叫做“位桶”的)+链表实现;jdk1.8中底层是由数组+...
License: Apache 2 , , stackoverflow - 1814 questions. Eclipse Vert.x Vert.x is a tool-kit for building reactive applications on the JVM . License: Eclipse Public 1 / Apache 2 , , stackoverflow - 728 questions. Reactive Streams - The purpose of Reactive Streams is to provide a ...