You can also try running like this:
您也可以尝试这样运行:
java -XstartOnFirstThread -jar skeletonViewer.jar
Otherwise I suggest getting the latest Java here (16.0.1):
否则我建议在这里获得最新的Java（16.0.1）：
https://jdk.java.net/archive/
Decompress the archive and run that Java instead of using your system Java (which is 1.8, very old).
解压缩存档并运行该Java而不是使用系统Java（1.8，非常旧）。
