Paul Krill
Editor at Large

Kotlin 1.4 arrives with IDE and compiler enhancements

news
Aug 18, 20202 mins

New release also features a project wizard for easy creation of projects of different types

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Kotlin 1.4, an upgrade to JetBrains’ Java alternative, is now available as a production release. Highlights of the update include new IDE and compiler capabilities.

IDE improvements in Kotlin 1.4 include a coroutine debugger and a Kotlin Project Wizard, which creates Kotlin projects of different types. The IDE also gains 40 new quick fixes, intentions, and inspections. And thanks to IDE performance tweaks, autocomplete suggestions and content highlighting in large Kotlin files are faster. 

A new compiler in Kotlin 1.4 features a more powerful type inference algorithm. There also are new JVM and JavaScript back ends, currently in an alpha mode. A hierarchical project structure in Kotlin 1.4 enables sharing of code between a subset of targets, such as similar iOS-related targets for iOS ARM64 devices. In addition, developers can use platform-dependent libraries from common code shared among several native targets.

Instructions for getting started with Kotlin can be found at kotlinlang.org. Statically typed Kotlin is positioned for the JVM, Android development, and the browser. In May 2017 Google endorsed Kotlin for the development of Android mobile apps.

Other features in Kotlin 1.4 include:

  • SAM (single abstract method) conversions for Kotlin interfaces.
  • An explicit API mode for library authors.
  • Mixing of named and positional arguments.
  • Trailing comma.
  • Callable reference improvements.
  • Experimental type annotations.
  • Use of break and continue inside when in loops.
  • Standard library improvements including new collection operators, delegated properties improvements and other capabilities, such as a double-ended queue implementation, ArrayDeque.
  • Gradually eovling coroutines based on user feedback.
  • The serialization library is getting closer to maturity with the release of serialization 1.0.0-RC.
  • The kotlinx-datetime library and preview of the DateTime API.
  • The JavaScript target for Kotlin has a new Gradle DSL and an alpha version of the Kotlin/JS IR compiler back end.
  • Improved performance of Kotlin/Native compilation and execution.
  • Better interoperability between Kotlin/Native and Swift/Objective-C.
  • Simplified management of CocoaPods dependencies.
Paul Krill

Paul Krill is editor at large at InfoWorld. Paul has been covering computer technology as a news and feature reporter for more than 35 years, including 30 years at InfoWorld. He has specialized in coverage of software development tools and technologies since the 1990s, and he continues to lead InfoWorld’s news coverage of software development platforms including Java and .NET and programming languages including JavaScript, TypeScript, PHP, Python, Ruby, Rust, and Go. Long trusted as a reporter who prioritizes accuracy, integrity, and the best interests of readers, Paul is sought out by technology companies and industry organizations who want to reach InfoWorld’s audience of software developers and other information technology professionals. Paul has won a “Best Technology News Coverage” award from IDG.

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