netbeans不会显示项目窗口
$ cat /etc/lsb-release DISTRIB_ID=Ubuntu DISTRIB_RELEASE=17.04 DISTRIB_CODENAME=zesty DISTRIB_DESCRIPTION="Ubuntu 17.04" $ java -version java version "9" Java(TM) SE Runtime Environment (build 9+181) Java HotSpot(TM) 64-Bit Server VM (build 9+181, mixed mode) $ javac -version javac 9 $ umake --version 16.11.1 $ umake ide netbeans [sudo] password for thufir: Choose installation path: /home/thufir/.local/share/umake/ide/netbeans Downloading and installing requirements | 100% |#####################################################################################| Installing Netbeans |##########################################################################################| Installation done $ netbeans The program 'netbeans' is currently not installed. You can install it by typing: sudo apt install netbeans 
可能与：
$ /home/thufir/.local/share/umake/bin/netbeans WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by org.netbeans.ProxyURLStreamHandlerFactory (file:/home/thufir/.local/share/umake/ide/netbeans/platform/lib/boot.jar) to field java.net.URL.handler WARNING: Please consider reporting this to the maintainers of org.netbeans.ProxyURLStreamHandlerFactory WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release ^C
这是我在干净安装之前看到的错误。
（可能与此错误有关 ，或至少类似。）
Netbeans 8.2仅适用于Oracle JDK 8，但不适用于JDK 9.我遇到了完全相同的问题。 （我认为Netbeans 9可以与JDK9一起使用，但还没有。）