java

As I go through some old applications I wrote for various purposes, but never released, I thought I'd share the source code for a Java program that you can use to get the x/y coordinates or the mouse cursor (pointer) and RGB value of the pixel at that location. I've used this application for various reasons, including determining the location of something on screen, determining the width or height between two points, or getting the RGB value of a pixel on screen.

Sigh, so many broken links, so little time ... when I switched this website to Drupal, I didn't (couldn't) take the time to move all of my static content in the Drupal CMS, so a lot of great content is just sitting out there in static files. To help fix that problem a little bit, here's a link to a collection of Java test project (example projects) that demonstrate all sorts of cool and fun things with Java, including:

Java keytool FAQ: Can you share an example of how to use the Java keytool command to create and share a Java/keytool certificate?

Here's a quick look at how two people, John and Paul, might use the Java keytool command to create and share a certificate file. In this example, John will create the certificate with the "keytool genkey" and "keytool export" commands, and Paul will import John's public key from the certificate file with the "keytool import" command.

Java keytool import FAQ: Can you share some examples of the Java keytool import command and process?

When you're working with Java public and private keys, there may be a time when someone else says, "Here is a certificate. Import it into your public key keystore, and then you can do XYZ", where "XYZ" can be a variety of things, including reading their document, using their Java application, etc. To do this you need to use the Java keytool import command.

Java keytool list FAQ: Can you share some examples of the Java keytool list command, and Java keytool list process?

In a long, earlier article on Java keytool, keystore, and certificates, I demonstrated how to list the contents of a Java keystore file, but to simplify things a little for this tutorial, I'm just going to show how to query a Java keystore file using the keytool list command.