There are three birthstones for the month of December: tanzanite, zircon and turquoise. All three of these stones are a deep blue color and have their own history and chemical composition. One of the more interesting of the three is tanzanite, a gem you may not have heard of before.
For other uses, see Interface (disambiguation) Â§ Computing. In computing, an interface is a shared boundary across which two separate components of a computer system exchange information. The exchange can be between software, computer hardware, peripheral devices, humans and combinations of these.
What is an interface. Interface looks like class but it is not a class. An interface can have methods and variables just like the class but the methods declared in interface are by default abstract (only method signature, no body).Also, the variables declared in an interface are public, static & final by default.hat is an interface. Interface looks like class but it is not a class. An interface can have methods and variables just like the class but the methods declared in interface are by default abstract (only method signature, no body).