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In my daily life, I enjoy taking photos with my smartphone and uploading them to various websites. So I started thinking, “Is it possible to implement these functions in a web browser?” Although Dynamsoft ImageCapture Suite allows us to capture i ...
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In HTML5, there is a new tag <canvas>, which is used to draw graphics via JavaScript. In this tutorial, I would like to share how to draw images on canvas, and how to save the canvas data to local disk by clicking button. Ads Powered by Dyn ...
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If you have implemented a Java program on desktop, why not bring it to mobile platform? In this tutorial, I will show how to transplant the Java program for PageRank and AlexaRank to Android platform. Let’s glance at the screenshot in advance.And ...
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In this article, I will share the basic concept of Libwebsockets, as well as how to write a simple program with the APIs.What is LibwebsocketsLibwebsockets is a lightweight pure C library; built to use minimal CPU and memory resources as well as ...
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Since we have known how to check PageRank in Java, let’s strengthen our tool by adding the functionality of checking Alexa rank today.To get the Alexa rank, you can use following code or read the excellent tutorial.import java.io.InputStream;impo ...
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In this tutorial, let’s continue to learn how to use OpenSSL to sign a certificate.Steps of Signing Certificate with OpenSSL We can use the command line to quickly generate ca certificate. openssl genrsa -out cakey.pem 2048 openssl req -new -days ...
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Previously, I talked about how to check PageRank in Java. In this article, I will combine PageRank with Excel files. To operate Excel files in Java, I used Apache POI - the Java API for Microsoft Documents. Apparently, you can download the API pa ...
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In this article, I am not going to go in-depth about Java and Swing. The content I will share in this article is about how to combine slices of knowledge to make a simple java tool for checking PageRank. In my previous article, I talked about how ...
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In this tutorial, let’s learn how to use OpenSSL to generate X.509 certificate request.Certificate signing request is a message sent from an applicant to a certificate authority, which usually includes: Country Name (2 letter code) [US] State or ...
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It is known that RSA is a cryptosystem which is used for the security of data transmission. This tutorial introduces how to use RSA to generate a pair of public and private keys on Windows. Download and install OpenSSL https://www.openssl.org/com ...