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1. Static variable Static variables are shared by all objects in the class, and their values are modified when they are used. usage method: Class name. Variable name Note: static methods can call static members of the same kind, not non static members and methods Static initial block usage: Sta ...

Original address: http://www.work100.net/training/java-serialization.htmlMore tutorials: Beam cloud - free course serialize Serial number Chapter in text video 1 Summary - 2 serialized objects - 3 Deserialize object - Please refer to the navigation above for reading 1. overview Java provides a mechanism of object serialization, in ...

Btrace is a dynamic code tracking tool in Java. By writing btrace script, it can dynamically inject tracking code into the byte code of the target application program. By modifying the byte code, it can achieve the purpose of monitoring, debugging and positioning problems, and it is a powerful tool to solve online problems. Github home page of ...

Static modifies the properties or methods of a class Instance property is the independent memory space (multiple copies) held by each object. If the object is modified unilaterally, other objects will not be affected. Static attribute, the instance attribute decorated by static, is. Static property i ...

Why use thread pools Is not more threads better? Threads are not only an object in Java, but also a resource of the operating system. Threads take time to create and destroy.Creation time + Destroy time > Execute task time is not a good idea. Java objects occupy stack memory, and operating sy ...

The first play of single example mode -- lazy type Lazy, this method can only be initialized when getInstance needs to be called, which has the advantage of saving memory space to some extent. But there is also a disadvantage that it is not safe in a multithreaded environment. The code is as follows: / ...

1. introduction Thread safety is the top priority of concurrent programming, and there are two main causes of concurrent problems. 1. Critical resources exist 2. Multiple threads operate on shared data at the same time Based on this situation, we will consider a mechanism that when one thread accesses ...

Introduction to 1.1 Disruptor Concurrency Framework Martin Fowler wrote an article on his website about the LMAX architecture, in which he described LMAX as a new retail financial trading platform that can generate a large number of transactions with very low latency.This system is built on the JVM pl ...

Method overloading 1. Method overloading is also known as: overload 2. When to consider using method overloading? When the functions are similar, try to keep the method names the same. [but: when the functions are different / different, try to make the method names different. ] 3. What conditions are ...

This series of notes is mainly based on "deep understanding of Java virtual machine: JVM advanced features and best practices version 2", which is the reading notes of this book. jmap command is used to generate memory heap dump snapshot, which is generally called heapdump or dump file. In addition to the jmap command, you can also ...