Skip to main content

All the colors of Java and so on

Search This Blog

An awesome Lego robot

on February 19, 2010

Get link
Facebook
X
Pinterest
Email
Other Apps

Be careful, this is an awesome video! You can also observe that the programmer is using an Acer netbook.

Get link
Facebook
X
Pinterest
Email
Other Apps

Popular Posts

DCcduino usb drivers (CH340 / CH341 chipset)

I've just received my first arduino platform. It's a DCcduino board (a clone of Arduino Uno). As I had some difficulties to have it recognised by my MacBook, I decided to share its drivers. This card has a CH340 USB-to-serial chip. You can find drivers for this chip on the web site of the chinese manufacturer, here : http://www.wch.cn/downloads.php?name=pro&proid=5 Or download it directly from my Google Drive. The archive contains drivers for Mac, Linux and Windows platforms. https://drive.google.com/file/d/0B5okZr5AW4gaX2pZaWt6dVNaSFU/edit?usp=sharing I hope this will help somebody. UPDATE for Mac users with Yosemite : Please, follow this extra instructions : Install the CH340 driver Run the command in Terminal: sudo nvram boot-args="kext-dev-mode=1" Reboot

How to register SSL certificates in your JVM?

You wrote a Java program which needs to access to a external ressource through SSL (such as LDAPS or HTTPS)? Okay, this post is for you. The first thing you have to know is that the first time you established a secured connection to something, you (normally) have to accept the certificate used to encrypt the dialog. In apps with interaction with end users (such as a web browser), the user often see a popup which asks him to trust the certificate. But, if the secured connection is establised behind the scene (without any possibility to show a popup to somebody, such in batch process apps), the certificate must be trusted before establishing the connection. In Java, there's a wallet which contains trusted certificate. It is located in [JAVA_HOME]/jre/lib/security/cacerts I explain here how to extract the public key of a SSL certificate and how to register is in the cacerts file. Step 1 : let's extract the public key from a secured connection We will use OpenSSL fo...

Use Spring profiles and yaml configuration without Spring Boot

That's a refinement you can do to updgrade legacy applications. Using yaml config files combines with Spring profiles is a great way to configure your apps. Let's see how to do that. Firstly, let's consider that we weill inject something in a java class depending on the runtime environment. @Service public class MyService { @Value("${service.url}") private String URL; } application.yaml should be like this : service: url: http://alexdp.free.fr/violetumleditor --- spring: profiles: production service: url: http://violet.sourceforge.net Thus, if I lauch my applicatin without JVM Spring profile params, URL will be http://alexdp.free.fr/violetumleditor. If I launch it with -Dspring.profiles.active=production, URL will be http://violet.sourceforge.net. Great! But this feature is natively supported only for Spring Boot based applications. So, let's active this on legacy apps with this XML spring config file fragment : ...

Powered by Blogger