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Thread state new 1) Thread t= new Thread once the thread object is created, it enters the new state 2) When the start() method is called, the thread immediately enters the ready state, but it does not mean that the execution is scheduled immediatelyReady state (CPU scheduling operation)Blocking state (when sleep,wait or synchronous lo ...

Continuous Learning & Continuous Updating... Break away Why use delayed loading Delayed loading: reload when needed Many times, we don't have all the properties of an object temporarily, especially those that are complex and hugeFor example, I only want to know the id and name of the Person object right now, but I can't use L ...

Some people say that Java is a static language. So what is static language and what is dynamic language? 1. Dynamic language It is a kind of language that can change its structure at run time: for example, new functions, objects and even code can be introduced, existing functions can be deleted or other structural changes. Generally speakin ...

Java simple design pattern The realization of design pattern is to make it easier to maintain, more concise, high decoupling, reduce memory consumption and other excellent characteristics. 1. Singleton design pattern Singleton design pattern: ensure that a class has only one instance, and provide a global access point to access i ...

Dictionaries and collectionsIt is a coincidence that dictionaries and collections are always put together because they are wrapped in braces {}.What are the basic operations of dictionaries and collectionsLet's start with the dictionaryThe dictionary is composed of Key Value pairs. The Key is Key and the Value is Value. Mark it in Python 3 Befo ...

Tip: after the article is written, the directory can be generated automatically. Please refer to the help document on the right for how to generate it preface ❤️ 1, Spring overview 🥇 1.1 INTRODUCTION Spring: Spring - > brings spring to the software industryIn 2002, Rod Jahnson first launched the Spring framework prototype inte ...

1. Overview Spring framework is an open source, loosely coupled, layered and configurable one-stop enterprise Java development framework. Its core is IoC (inversion of control) and AOP (aspect oriented programming). In spring, the objects that form the backbone of the application and are managed by the Spring IoC container are called bean s. B ...

catalogue 4.1 time and date 4.1.1 time module 4.1.2 Sleep function 4.1. 2. Datetime module 4.1.2.1 now() method 4.1. 2.2 strftime (FMT) method 4.2 document operation 4.2. 1 open file 4.2. 2 write file 4.2.2.1 write() method 4.2.2.2 writelines() method 4.2. 3 read file 4.2.3.1 read() method 4.2.3.2 readlines() method 4.2.3.3 wit ...

public static void main(String[] args) throws InterruptedException { Thread t1 = new Thread(()->{ while (true) { if (Thread.currentThread().isInterrupted()) { System.out.println("Interrupt!"); break; } ...

Background issues Before talking about binlog, let's review the default isolation level of mainstream relational databases. It's the default isolation level, not the isolation levels of transactions. Don't be mistaken 1. What is the default isolation level of Oracle and SQL Server and MySQL? 2. Why is the default isolation level of MySQL RR? ...