如何在java中調用kotlin代碼

1,包級別的函數

All the functions and properties declared in a file example.kt inside a package org.foo.bar, including extension functions, are compiled into static methods of a Java class named org.foo.bar.ExampleKt

// example.kt
package demo

class Foo

fun bar() { ... }

對應的java操做

// Java
new demo.Foo();
demo.ExampleKt.bar();

若是想給轉換後的java類指定類名，能夠用 @JvmName :

@file:JvmName("DemoUtils")
package demo
class Foo
fun bar() { ... }

java操做

// Java
new demo.Foo();
demo.DemoUtils.bar();

參考文獻 https://kotlinlang.org/docs/reference/java-to-kotlin-interop.html