Kotlin M13 发布，此版本更新内容如下：

• Compiler daemon for faster compilation;

• lateinit properties to support dependency injection and other frameworks;

• sealed classes for expressing closed hierarchies;

• Specifying and checking annotation targets;

• Java get/set pairs are now seen as properties in Kotlin;

• Better type safety for Java interop: taking @NotNull annotations into account (see this blog post);

• Modifiers and annotations have been separated syntactically (see this blog post);

• Fully functional reflection on classes, functions and properties;

• Access to internal is now checked outside of a module (details below);

• New .class file layout for top-level functions and properties;

• and more (see below)

详细改进请看发行说明。

同时发布了 Kotlin Eclipse Plugin 0.3.0，此版本新特性：

• Kotlin M13 支持

• 查找手册

• 参数提示
  

• 选择 enclosing/next/previous 元素

• Override/Implement action

• Body conversion intention

• Debugger: Run to cursor

• Debugger: Step into selection

• 性能提升
  

Kotlin 是一个基于 JVM 的新的编程语言，由 JetBrains 开发。

其主要设计目标：

• 创建一种兼容Java的语言

• 让它比Java更安全，能够静态检测常见的陷阱。如：引用空指针

• 让 它比Java更简洁，通过支持variable type inference，higher-order functions (closures)，extension functions，mixins and first-class delegation等实现。

• 让它比最成熟的竞争对手Scala语言更加简单。

文章转载自：开源中国社区 [http://www.oschina.net]