小编Haw*_*ork的帖子

从我的理解科特林应该能够使用JRE 6运行,但这个代码用foreach在地图上失败,因为对一个Java类8引用(java/util/function/BiConsumer)

CompilerTest.kt:

fun main(args: Array<String>) {
  val aMap = mapOf("bar" to "bat")
  aMap.forEach { k, v -> println("$k -> $v")}
}

编译Kotlin代码:

» kotlinc CompilerTest.kt -jvm-target 1.6 -include-runtime -d compilerTest.jar

在JRE 6上测试已编译的代码:

» docker run --rm -v "$PWD":/usr/src/myapp -w /usr/src/myapp openjdk:6-jdk-slim java -jar compilerTest.jar
Exception in thread "main" java.lang.NoClassDefFoundError: java/util/function/BiConsumer
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:643)
    at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
    at java.net.URLClassLoader.defineClass(URLClassLoader.java:277)
    at java.net.URLClassLoader.access$000(URLClassLoader.java:73)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:212)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:323)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:294)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:268)
    at …