HMAC-SHA256 Algorithm for signature calculation?

I am trying to create a signature using the HMAC-SHA256 algorithm and this is my code. I am using US ASCII encoding....

Android Immersive Mode - custom color?

I have enabled SYSTEM_UI_FLAG_IMMERSIVE_STICKY in my app but it seems that the default behavior makes the navigation...

Equation-driven smoothly shaded concentric shapes?

Background Looking to create interesting video transitions (in grayscale). Problem Given equations that represent...

Can PDFBox sign all 'Approval Signatures' instead of always making first signature as 'Certified'??

As Adobe article "Digital Signatures in a PDF" stating: PDF defines two types of signatures: approval and certif...

Error:java: javacTask: source release 8 requires target release 1.8?

Using IntelliJ IDE can't compile any projects. Screenshots of settings below: Used JDK: Project SDK and Language...

Java: What is the difference between <init> and <clinit>??

I am unable to understand the following text... Does it mean that &lt;clinit&gt; is for empty constructors? Why is i...

Java: What is the difference between <init> and <clinit>??

I am unable to understand the following text... Does it mean that &lt;clinit&gt; is for empty constructors? Why is i...

GridBagLayout start Jbuttons from middle of the screen?

I have 14 buttons in GridBagLayout. Problem is that buttons start from middle of the screen vertically, instead from...

Error:java: invalid source release: 8 in Intellij. What does it mean??

Im trying to compile some code in I'm using Intellij Ultimate 13.1.4, but I get the following error and I have no id...

Error:java: invalid source release: 8 in Intellij. What does it mean??

Im trying to compile some code in I'm using Intellij Ultimate 13.1.4, but I get the following error and I have no id...

How to draw inner stroke with Java2D?

I just want to draw the circle which is exactly 15x15 pixels sized, and have fill and outline. I'm using Java2D. The...

Fill triangle with 3 color gradient in Java?

I was not able to find a solution for this problem. I would like to paint a filled triangle in Java with gradient wh...

How do I split a SVG shape into several shapes in Java or Processing??

For example, given a circle SVG shape with five points located equidistantly on it. I want to split the circle into...

Implementing Photoshop's “Poster edges” -filter?

I'm trying to find out what effects the Photoshop "Poster edges" filter is composed of. It seems it's a combination ...

Jbuttons won't organize in a grid layout until i click on another window?

I am making a chess game and I'm somewhat new at java so forgive me if this ends up being a result of my own stupidi...