Scala Console.readInt已弃用

Question

scala的命令行解释器显示：

scala> Console.readInt
warning: there was one deprecation warning; re-run with -deprecation for details
res0: Int = 65

Console.readInt真的被弃用了吗？如果是，采取输入的正确方法是什么？

我在OS X 10.10.5上使用Scala版本2.11.7。

Answer 1

在Scala 2.11中，您可以使用

scala.io.StdIn.readInt()

或

scala.io.StdIn.readLine().toInt

Answer 2

根据REPL的建议，运行scala -deprecation以获取更多信息：

scala -deprecation
Welcome to Scala version 2.11.2 (OpenJDK 64-Bit Server VM, Java 1.7.0_79).
Type in expressions to have them evaluated.
Type :help for more information.

scala>  Console.readInt
<console>:8: warning: method readInt in class DeprecatedConsole is deprecated: Use the method in scala.io.StdIn
               Console.readInt
                       ^

Answer 3

检查Scala Api

(Since version 2.11.0) Use the method in scala.io.StdIn

它还有readInt方法

Answer 4

或者，您可以使用导入来抑制警告：

import scala.io.StdIn._
val name = readLine("Your name:")
val age = readInt()
printf("Your name: %s, your age: %d\n", name, age)