Shulou(Shulou.com)06/03 Report--

This article mainly explains "Java process thread-related knowledge point sorting". The explanation content in this article is simple and clear, easy to learn and understand. Please follow the idea of Xiaobian and go deep into it slowly to study and learn "Java process thread-related knowledge point sorting" together.

1. Processes and threads

(1) Process: is a running program, is the system for resource allocation and call of independent units, each process has its own memory space and system resources.

Thread: A single sequential control flow in a process, a path of execution. Single-threaded: A process is called a single-threaded program if it has only one execution path. Multithreading: A process that has multiple execution paths is called a multithreaded program.

2. Implementation of multithreading method 1: Inheriting Thread class

(1) Introduction of the method

(2) Implementation steps:

- Define a class MyThread inherits the Thread class

- Overwrite the run() method in the MyThread class

- Create objects of MyThread class

- start a thread

3) Two small problems

Why rewrite the run() method?

Because run() is used to encapsulate code that is executed by threads.

b. What is the difference between run() and start() methods?

run(): Encapsulate the code executed by the thread, call it directly, equivalent to calling an ordinary method. start(): Start the thread; the JVM then calls the run() method of this thread

3. Set and get thread name

Method Description:

4. Thread priority

(1) Thread scheduling

Time-sharing scheduling model: All threads take turns using the CPU, and each thread is evenly distributed to occupy the CPU time slice. Preemptive scheduling model: priority is given to threads with high priority to use CPU. If the priority of threads is the same, one will be randomly selected. The thread with high priority will get more CPU time slices. Java uses a preemptive scheduling model. If the computer has only one CPU, then the CPU can only execute one instruction at a time, and the thread can only execute the instruction if it gets the CPU time slice, that is, the use right. Therefore, the execution of multithreaded programs is random, because who grabs the right to use the CPU is not certain.

(2) Priority correlation method

5. Thread control

Related methods:

Thank you for reading, the above is the "Java process thread-related knowledge points finishing" content, after the study of this article, I believe we have a deeper understanding of Java process thread-related knowledge points finishing this problem, the specific use of the situation also needs to be verified by practice. Here is, Xiaobian will push more articles related to knowledge points for everyone, welcome to pay attention!

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.