It's an open-source language that can also compile code to bytecode and run on Java Virtual Machine (JVM), enabling it to work on almost any platform. Kotlin is much younger than Java, since it was first introduced in 2016. In fact, Java's syntax shares some similarities with C and C++ but provides fewer lower-level facilities. Moreover, Java is statically typed, performing type checking during compile time. In addition, since it is compiled to bytecode, it can run on any Java Virtual Machine (JVM). As a multiplatform language, Java works on almost any device, operating system, and server. It is an open-source, general-purpose, object-oriented programming language. Java was launched in 1995 and developed by James Gosling at Sun Microsystems (which in 2009 was acquired by Oracle). Functional Programming: Higher-Order Functions and Lambdas Afterward, we'll discuss whether Kotlin is or not better than Java and highlight the main reasons. Facebook Linkedin Image of Kotlin logo versus Java logo.ĭo you prefer Kotlin or Java for Android development? This article seeks to explain the 12 main differences between both programming languages. Toast.makeText(applicationContext, 'Enter Your Name OR Click DECLINE', 'Registered $EnteredText', Toast.LENGTH_SHORT).show()ītOnClickListener(View.Shape Created with Sketch. Import 7.app.AppCompatActivityĬlass PageTwoActivity : AppCompatActivity() ) Without the two buttons for PageTwoActivity The Activity structure is as follows PageTwoActivity has its own XML file with two buttons attached. The error source is eluding us ! We have looked at a number of posts and tried a few with no results. : findViewById(R.id.btnYES) must not be null

We have created a custom alert dialog that was used in a Java project by converting it to Kotlin The error posted below

Kotlin if not null