Creating threads using Callable and Future

In addition to the common ways of creating threads, we can also create threads using Callable and Future. This method is essentially consistent with other ways of creating threads. Only this way of creating threads can return the results of threads. Traditional runnable interface public interface Runnable { /** * When an object impleme ...

Posted by scrappy1855 on Mon, 29 Jun 2020 23:50:41 -0700

Kinematics and trajectory planning simulation of PUMA 560 based on Matlab

Kinematics analysis of PUMA560 Reference textbook: Cai Zixing, the third edition of Robotics PUMA560 modeling and simulation matlab code matlab Toolbox: robotics toolbox ① Download address http://petercorke.com/wordpress/toolboxes/robotics-toolbox Download the installation package (. zip) format, and copy the extracted folder &quot ...

Posted by dnoonan on Mon, 29 Jun 2020 23:10:48 -0700

Building K8S cluster of EMQ X MQTT server from scratch

EMQ X Team provides Helm chart for users to deploy EMQ X on kubernetes cluster with one click MQTT server This is the most recommended method of deploying EMQ X MQTT server on kubernetes or k3s cluster by EMQ X Team. This paper will use the method of handwritten yaml file to deploy a K8S cluster of EMQ X MQTT server from scratch, and analyze t ...

Posted by chacha102 on Mon, 29 Jun 2020 22:46:35 -0700

Android clipboard sensitive information disclosure vulnerability solution: disable the copy and paste function of EditText

Any third-party software in Android can access the content of the clipboard. Although the high version imposes access restrictions on the clipboard, we still need to take care of the lower version. Let's talk about the solution below. 1. Custom nomunedittext inherits from AppCompatEditText 2. Overr ...

Posted by lnt on Mon, 29 Jun 2020 22:10:56 -0700

Wechat applet -- 365 notes the 44th day --- get the user's authorized geographical location, longitude and latitude

Demand:1. When entering the page, request the user's geographic location authorization to obtain the user's current geographic location;2. Get the longitude and latitude of users, sometimes it is necessary to calculate the distance between users and stores by longitude and latitude; Steps:1. Wechat appl ...

Posted by aseaofflames on Mon, 29 Jun 2020 22:01:07 -0700

linux training assignments, shell programming calculation problems

Training assignment Write a shell program to display the menu. Use the function to realize the simple menu function. The value of n is input by keyboard **(1) Calculate the sum of odd numbers from 1 to n** **(2) Calculate the factorials from 1 to n** **(3) Calculate all primes from 1 to n** **(4) Ex ...

Posted by CraigRoberts on Mon, 29 Jun 2020 21:39:36 -0700

The deepest analysis of spring boot MVC automatic configuration failure in the whole network

preface I didn't plan to write this article, but after reading the core principles of SpringBoot, I suddenly thought of the MVC automatic failure problem encountered in the previous development. Although there are many articles and official documents on the Internet explaining the reasons, I still want to have a look at it in person. What I tho ...

Posted by pr0x on Mon, 29 Jun 2020 21:05:23 -0700

Super simple integrated ML kit for dictation

background    I believe that all of us have dictation when we first learn a language. Now when primary school students learn Chinese, an important homework is dictation of new words in the text. Many parents have this experience. However, on the one hand, the action of reading words is relatively simple, on the other hand, parents' ti ...

Posted by abch624 on Mon, 29 Jun 2020 21:02:34 -0700

[cluster building topic] - Kafka cluster building

Kafka -- cluster building Service discovery: first of all, the mutual discovery of services between kfakas is realized by using Zookeeper. Therefore, Zookeeper must be built in advance. To build a Zookeeper cluster, please pay attention to the blog's article: Building Zookeeper cluster;Service relat ...

Posted by Bauer418 on Mon, 29 Jun 2020 20:50:55 -0700

[STM32] RS485 Modbus protocol collects sensor data

1, Hardware 1. Sensor: hydraulic sensor, 12vDC, RS485 data output, Modbus protocol communication2. Circuit: according to the sensor properties, the circuit is mainly composed of two parts, communication circuit and power supply (1) 485 circuit: because 485 is half duplex communication, it needs to control the transceiver, so it is simply desig ...

Posted by maxrisc on Mon, 29 Jun 2020 20:49:24 -0700