在idea中的编译scala项目的时候出现了 Error:(6, 8) WordCount is already defined as object WordCount object WordCount{ 原因是这两个myproject/src和myproject/src/main/scala被标记为源。因此,myproject/src/main/scala由于上述错误,intellij无法构建。取消标记源myproject/src (在intellij,File-> Project结构中...
错误记录: 通过IDEA方式创建scala项目后,在修改项目目录结构时,将src、main、scala目录全部设置为Sources时, 运行程序时报错:Error:(1,8) helloisalreadydefinedasobjecthelloobjecthello { 解决方案: 只将程序上一层目录设置为Sources,问题解决。 idea 配置scala 和运行 HelloWorld的一些坑 ...
解决办法:在 创建main文件夹和scala文件夹的时候,注意src与这两个文件夹不能同时设置为resources,否则就会产生报错,解决办法将src文件夹的resources取消,右键。
Error:object scala.reflect.ClassManifest not found. ... 升级scala version 到 2.11.0后, 解决。 新版本 scala 的 lib 中多了一个 scala-reflect.jar. 具体原因不明 2、编写类 在intelliJ IDEA 中编写scala, 编译时 报错 test is already defined as object test 类如下 object test{ def main(args:Arr...
按以下截图进行操作: 选中项目,右键点击。 按ctr+alt+shift+s,弹出project structure方框,如下图: 这里的Kind选择object 然后写一段scala代码,运行。这样一个简单的scala小程序就创建完成了。 如果运行时报错,例如我的是Error:(1, 8) Demo1 is already defined as object Demo1 object Demo1... ...
和java一样右键运行即可。但是我们在运行后却出现了报错，看一下报错信息为TestHelloWorld is already defined as object TestHelloWorld。对于这个报错是因为我们把src包也标记为Source了，我们重复步骤3，将src包的Sources标记取消即可。注意事项 src包标记为Sources启动会报错 Scala 的SDK需要手动去选择 ...
5.1:Error:(4, 8) HelloWorld is already defined as object HelloWorld 通过IDEA安装scala插件后,想要new一个scala文件,却没有对应的文件信息。解决方案如下: 一、设置Module 首先,在View中,打开Module Settings设置, 也有可能是在file->project structure中,不同的IDEA设置方式不同, ...
message Person { required int32 id = 1; required string name = 2; optional string email = 3; } and get [error] [...]/target/scala-2.10/src_managed/scala/Person.scala:79: Person is already defined as object Person [error] object Person { [error] ^ [error] one error found [error...
If class StringOrInt[T] is made sealed, the "leak" you referred to ("Of course, this could be side-stepped by the client code by creating a StringOrInt[Boolean]") is plugged, at least if StringOrInt resides in a file of its own. Then the witness objects must be defined in the ...
Going back to our originalmsg, now that it is defined, you can then use themsgvalue as you'd expect, as in: scala> println(msg) Hello, world! unnamed3: Unit = () What you can't do withmsg, given that it is avalnot avar, is reassign it. For example, see how the interpreter ...