Shulou(Shulou.com)06/02 Report--

This article focuses on "Java thread safety and unsafe case analysis", interested friends may wish to take a look. The method introduced in this paper is simple, fast and practical. Next, let the editor take you to learn "Java thread safety and unsafe case analysis"!

When we look at JDK API, we will always find some class instructions that say, thread-safe or thread-unsafe. For example, there is a sentence in StringBuilder that says, "it is not safe to use an instance of StringBuilder for multiple threads. If you need such synchronization, it is recommended to use StringBuffer." so let's manually create a thread-unsafe class, and then use it in multithreading to see how it works.

Count.java:

Public class Count {private int num; public void count () {for (int I = 1; I)

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