另一个可能的重复:intellij idea没有看到java 9 标准类

虽然我不明白评论中的答案.尝试为 JDK(9 和 1.9)设置不同的名称，但它仍然没有显示模块而不是类路径，并且类路径仍然为空.

当前的 debian 二进制包 openjdk-9-jre-headless 9~b181-4 包含错误编译的 lib/jrt-fs.jar 文件.idea youtrack 和 ubuntu 启动板.

正如此处所示:>

可能的原因:lib/jrt-fs.jar 中的类由 Java 9 编译，带有选项-source 8″/target 8″.它们应该使用–release 8″选项编译(或通过 Java 8)

一种临时解决方法可能是将 /usr/lib/jvm/java-9-openjdk-amd64/lib/jrt-fs.jar 替换为 Oracle JDK.您也可以尝试使用建议的选项–release 8“重新编译 openjdk-9 源.

无论如何，我建议在上面的链接上对这个问题进行投票，以吸引开发团队的更多关注.

Before you write me off, please consider that neither of these are answers to my question:

In IntelliJ IDEA 2017.2.6, attempting to add JDK9 as an SDK passes but does not work as the classpaths end up empty. Steps to reproduce:

In IntelliJ IDEA 2017.3 EAP you get an error about JDK classes not being found. See images below:

Command line compilation of HelloWorld example with jdk9 works as expected.

EDIT: Found an almost-duplicate: Intellij IDEA 2017.2 can’t add openjk 9 on Linux Mint 18. Key differences:

EDIT: Another possible duplicate: intellij idea does not see java 9 standard classes

I did not understand the answer from the comments though. Tried setting different names for JDK (9 and 1.9) but it still did not show modules instead of classpaths and classpaths remained empty.

Current debian binary package openjdk-9-jre-headless 9~b181-4 contains incorrectly compiled lib/jrt-fs.jar file. There are 2 filed issues separately on both idea youtrack and also ubuntu launchpad.

As it is indicated here:

Probable reason: Classes in lib/jrt-fs.jar were compiled by Java 9 with options “-source 8″/”target 8”. They should be compiled with “–release 8” option instead (or by Java 8)

A temporary workaround may be replacing /usr/lib/jvm/java-9-openjdk-amd64/lib/jrt-fs.jar with the one from Oracle JDK. You may also try to recompile the openjdk-9 source using the advised option “–release 8“.

Anyway I advice to vote up this issue on the above link to attract more attention by dev team.

这篇关于由于新的文件夹结构，在 Linux 上的 Intellij IDEA 中将 Java 9 正确设置为 SDK的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，WP2