Scala - 分号不一致 [英] Scala - semicolon inconsistency

问题描述

我有这个非常简单的代码(scala-2.10):

I have this very simple code (scala-2.10):

import scala.io.Source

object Test2 {
    def main(args: Array[String]): Unit = {
        for(line <- Source.fromFile("/Users/alexei/words.txt", "utf-8").getLines()) {
            println(line)
        }
    }
}

我在编译时收到此错误消息:

I get this error message when compiling:

Test2.scala:3: error: ';' expected but 'object' found.
object Test2 {
^
one error found

我非常困惑何时使用分号.我还有其他与此类似的代码，并且在没有任何分号的情况下编译没有任何问题.

I am terribly confused when to use semicolons or not. I have other code similar to this and it has no issues compiling without any semicolons what so ever.

有人可以解释这个特定的错误并详细说明需要分号的所有情况吗?

Can someone please explain this specific error and detail all the situations where a semicolon is needed?

推荐答案

代码对我来说很好用.

唯一需要分号的时候是在同一行写多条语句.否则，换行符表示分离.因此，您当前的代码中不需要任何分号，但如果您想这样做:

The only time you need semicolons is when you are writing multiple statements on the same line. Otherwise the line-break indicates the separation. So you don't need any semicolons in your current code, but if you would if you wanted to do this:

println(line); println(line)

而不仅仅是

println(line)
println(line)

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