Which programming language will be the most demanded in 2017?

Kotlin?

See, the demand doesn't matters because all programming languages are not meant for a single purpose. Every one has their own area of expertise. For eg:- Java is used widely for Android apps and for cross platform purposes, C++ is used for developing games, while web development requires HTML, CSS, JavaScript, PHP, JQuery etc. It doesn't mean that one cannot be used for other, but all languages are specialized for one task. BTW, check this out https://www.quora.com/What-are-the-programming-language-trends-for-2017

http://www.codingdojo.com/blog/9-most-in-demand-programming-languages-of-2017/

java & go visit 👉 https://www.tiobe.com/tiobe-index/

C#

c#