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Most people do not understand the knowledge points of this article "how to define and use Java threads", so the editor summarizes the following contents, detailed content, clear steps, and has a certain reference value. I hope you can get something after reading this article. Let's take a look at this "how to define and use Java threads" article.

I. basic concepts

1. What is a thread?

Thread thread is the smallest unit that the operating system can schedule operations. It is included in the process and is the actual operating unit of the process. Different threads can be concurrently in a process, and each thread can perform different tasks in parallel.

2. Concurrency and parallelism

Concurrency: refers to two or more events occurring at the same time (simultaneously).

Parallelism: when two or more practices occur in the same period of time.

3. The difference between thread and process.

Process: refers to an application running in memory, each process has an independent memory space, and an application can run multiple processes at the same time; process is also an execution process of the program, which is the basic unit for the system to run the program; the system runs a program is the process from the creation, running to the demise of a process.

Thread: an independent execution unit within a process; one can run multiple threads concurrently. To put it simply, a process is equivalent to a single CPU operating system, and threads are multiple tasks running in this system.

Second, the use of threads

(1) define subclass to inherit Thread class

(2) override the run method in the Thread class in the subclass

(3) create a Thread subclass object, that is, a thread object

(4) call the thread object start method, start the thread, and call the run method

Class MyThread extends Thread {public MyThread () {super ();} public void run () {for (int I = oteri)

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