1 Black skin and Asian skin have thicker and more compact dermis than white skin. This is also why blacks and Asians have fewer facial wrinkles than whites.  Black skin has more casual lipids and more moisture in the stratum corneum than white skin.
A software development kit (SDK or  devkit ) is typically a set of software development tools that allows the creation of applications for a certain software package, software framework, hardware platform, computer system, video game console, operating system, or similar development platform.
JDK is Java Developer Kit -- the JDK is what you need to compile Java source code. JRE is Java Runtime Environment -- is what you need to run a java program -- it contains a JVM, among other things. OpenJDK is a specific JDK implementation.he JDK is a superset of the JRE, and contains everything that is in the JRE, plus tools such as the compilers and debuggers necessary for developing applets and applications. Note that Oracle is not the only one to provide JDK.