Scala 映射到 Java HashMap
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Scala Map to Java HashMap
提问by gknauth
I have a Scala function f(s1: String, s2: String): Map[String,String]
我有一个 Scala 函数 f(s1: String, s2: String): Map[String,String]
I want to allow a colleague coding in Java to call a Java method I'm writing:
我想允许用 Java 编码的同事调用我正在编写的 Java 方法：
HashMap<String, String> f(String s1, String s2)
HashMap<String, String> f(String s1, String s2)
This calls my Scala function. What I've found, on the Java side, is that Scala has returned a scala.collection.immutable.Map.
这调用了我的 Scala 函数。我发现，在 Java 方面，Scala 返回了一个scala.collection.immutable.Map.
How do I make a Java HashMap out of it? Or should I be doing something else?
如何从中制作 Java HashMap？还是我应该做点别的？
回答by Justin Pihony
I think what you are looking for is here. Specifically the mapAsJavaMapmethod.
我想你要找的就在这里。具体mapAsJavaMap方法。
Where the preferred usage is explained in this SO questionUsing imported implicitsand asJava
在此 SO 问题中解释了首选用法使用导入implicits和asJava
