July 2020
Intermediate to advanced
235 pages
3h 37m
Chinese
Content preview from Kotlin 编程实践
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16
｜
第
1
章
编译器生成了
HelloKt.class
文件，其中包含了可以被 Java 虚拟机执行的字节码。
Kotlin 不会生成 Java 源文件
—
因为它不是一个翻译器。它生成的是可以被 JVM 解
释的字节码。
被编译后的文件采用首字母大写的类名，然后在末尾加上
Kt
作为文件名。这些可以通
过注解来控制。
如果你希望生成一个自包含的可以被 Java 命令执行的 JAR 文件，可以添加 -include-
runtime 参数。这将允许你生成一个可以使用 java 命令执行的 JAR，参见示例 1-3。
示例 1-3：导入 Kotlin 运行时
> kotlinc-jvm hello.kt -include-runtime -d hello.jar
该命令将输出一个可以被 java 命令执行的名为
hello.jar
的文件。
> java -jar hello.jar
Hello, Kotlin!
移除 -include-runtime 标记将生成一个 JAR 文件，该文件需要 Kotlin 运行时在类
路径上执行。
不带任何参数的 kotlinc 命令将启动交互式 Kotlin REPL（Read-Eval-Print
Loop），参见示例 1-4。
参阅
示例 1-4 展示了如何使用 Kotlin REPL 进行交互式编码。1.5 节将讨论在命令行中执行
Kotlin 脚本。
1.4
使用
Kotlin REPL
问题
如何在交互式的 shell 中运行 Kotlin ？
解决方案
通过在命令行键入 kotlinc
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.