![]() ![]() Have a look at the function declaration near the top of both panes. Type inference seems to be improving with each release of Kotlin. The val and var keywords can be used only when the type can be inferred. ![]() Similarly, the var keyword declares a mutable property or local variable. The val keyword declares a read-only property or local variable. You can see that functions are defined with the fun keyword, and that semicolons are now optional when newlines are present. The Java idiom StringBuilder sb = new StringBuilder() īecomes in Kotlin val sb = StringBuilder() Notice that the mindless repetition inherent in instantiating Java variables has gone away. Consider the screenshot above, where I have converted a Java code sample (at left) to Kotlin automatically. IDG Kotlin as a more concise Java languageĪt first glance, Kotlin looks like a more concise and streamlined version of Java. JetBrains uses Kotlin in many of its products including its flagship IntelliJ IDEA. The Kotlin team currently has more than 90 full-time members from JetBrains, and the Kotlin project on GitHub has more than 300 contributors. Kotlin originated at JetBrains, the company behind IntelliJ IDEA, in 2010, and has been open source since 2012. ![]() Versions of Kotlin targeting JavaScript ES5.1 and native code (using LLVM) for a number of processors are in production as well. It is focused on interoperability, safety, clarity, and tooling support. Kotlin is a general purpose, free, open source, statically typed “pragmatic” programming language initially designed for the JVM (Java Virtual Machine) and Android that combines object-oriented and functional programming features. ![]()
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