从Clojure调用Java

Question

当我尝试在Clojure的REPL中运行以下代码时：

(dotimes [i 5]
  (.start
   (Thread.
    (fn []
      (Thread/sleep (rand 1000))
      (println (format "Finished %d on %s" i (Thread/currentThread)))))))

I get the following error:

java.lang.Exception: Unable to resolve symbol: i in this context
clojure.lang.Compiler$CompilerException: NO_SOURCE_FILE:6: Unable to resolve symbol: i in this context
        at clojure.lang.Compiler.analyze(Compiler.java:3713)

我在这里做错了什么？

- Paul Reiners

Answer 1

使用最新的SVN（1144），您的代码对我有效。

user> (dotimes [i 5] (.start (Thread. (fn [] (Thread/sleep (rand 1000)) (println (format "Finished %d on %s" i (Thread/currentThread)))))))

Finished 0 on Thread[Thread-16,5,main]
Finished 4 on Thread[Thread-20,5,main]
Finished 3 on Thread[Thread-19,5,main]
Finished 1 on Thread[Thread-17,5,main]
Finished 2 on Thread[Thread-18,5,main]

您是否正在使用9月16日发布的版本？您几乎必须使用Clojure的SVN版本。它变化得太快了。

- Brian C.

Answer 2

我认为你的意思是“从Clojure调用Java”。他们仍在修改语法。请参考此链接。

- JMan