This example will show you how to use node js to implement TCP socket client-server communication. To achieve this you need to import node js built-in net module and use the net.createServer method to create a net.Server object as TCP server, and use net.createConnection method to create a net.Socket object as TCP client.
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Node JS http module can be used to implement an http web server waiting for a client to request, it can also create an http client object which can send requests to another http webserver with query string or post data. This article will show you how to implement an http web server, how to
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Node JS provides synchronous and asynchronous methods for reads and writes local files. When you use the synchronous method, the execution thread will be blocked until the process complete, and you need to catch the exception by yourself in code. When you use the asynchronous method, you need to provide a callback function as the
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This example will tell you how to create a custom Node JS module, how to publish it to the NPM central repository, and how to import it as a library into your node application to use.
Node JS Create Publish And Use Custom Package Module Example Read More »
This example will show you how to use various android.graphics.Canvas class’s methods to draw text, point, line, circle, rectangle, oval, arc, and self-defined shapes. 1. Android Graphics Canvas Draw Method Example. If you can not watch the above video, you can see it on the youtube URL https://youtu.be/HtR0yY0kCcI The above example demo video shows that
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android.view.SurfaceView is a sub-class of android.view.View. It is used to create custom views in android game development. It does not have the onDraw method, but you can get and use the android.view.SurfaceHolder object to get and lock the view canvas, and then paint on it. This example will show you how to use it.
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If you have a two-dimensional array, and you want to swap the array rows and columns elements in both clockwise and anti-clockwise directions. This example will tell you how to implement it in java.
Java Swap Rows And Columns ClockWise In Two Dimensional Array Example Read More »
This example will show you how to change the android device screen orientation ( horizontal to vertical vice versa ) and how to avoid activity restart during the screen orientation change.
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Spring boot is used to help developers develop spring applications quickly and easily. It can help you in the following aspects. Create spring project file structure and related source files with a wizard. Get and add correct dependencies jars into your spring project automatically from the spring repository. You do not need to care about
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A reader of the article Read / Write Excel Data Using Apache POI asks me a question about how to read excel sheet data and write those data to a JSON file. This question lead to this example. So after reading this article you can know how to convert excel sheet data to a JSON
Convert Excel To JSON In Java Example Read More »