更新后，IntelliJ无法与Java 8一起使用 [英] IntelliJ does not work with Java 8 after update

问题描述

所以，2天前一切都运转良好。昨天我更新了IntelliJ，现在我收到一个错误：

So, 2 days ago everything was working perfectly. Yesterday I updated IntelliJ and now I' getting an error:

Exception in thread "main" java.lang.Error: Unresolved compilation problems: 
The method stream() is undefined for the type List<PostVector>
Lambda expressions are allowed only at source level 1.8 or above
The method stream() is undefined for the type List<PostVector>
Lambda expressions are allowed only at source level 1.8 or above

PostVector 是我的类。

我已将所有内容设置为Java 8（从IntelliJ中的SDK到env。变量）...

I have everything set to Java 8 (from SDK in IntelliJ to env. variables)...

是的，在我更新IntelliJ的项目中一切正常，但是这个项目不起作用是另一个项目，所以也许有一个问题（但我仍然不知道如何解决它）

And yeah, in project in which I updated IntelliJ everything works fine, but this project in which it does not work is another project, so maybe there is a catch (but I still don't know how to fix it)

推荐答案

你必须等待gwt 2.8。在gwt 2.8版本之前不支持Lambda。

You must wait for gwt 2.8. Lambdas are not supported before gwt 2.8 version.

您可以尝试2.8.0-beta1。

You can try 2.8.0-beta1.

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