运行显示Error：
A JNI error has occurred ，please check your installation and
try again.
还有
A Java Exception has occurred
Console报错显示：
Exception in thread "main" java.lang.SecurityException: Prohibited package name: java
at java.base/java.lang.ClassLoader.preDefineClass(ClassLoader.java:895)
at java.base/java.lang.ClassLoader.defineClass(ClassLoader.java:1010)
at java.base/java.security.SecureClassLoader.defineClass(SecureClassLoader.java:150)
at java.base/jdk.internal.loader.BuiltinClassLoader.defineClass(BuiltinClassLoader.java:862)
at java.base/jdk.internal.loader.BuiltinClassLoader.findClassOnClassPathOrNull(BuiltinClassLoader.java:760)
at java.base/jdk.internal.loader.BuiltinClassLoader.loadClassOrNull(BuiltinClassLoader.java:681)
at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:639)
at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:188)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:520)
at java.base/java.lang.Class.forName0(Native Method)
at java.base/java.lang.Class.forName(Class.java:467)
at java.base/sun.launcher.LauncherHelper.loadMainClass(LauncherHelper.java:780)
at java.base/sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:675)
就是说你的包名不能是java，java可以作为源码目录，但是不能用作包名，是安全规范禁止的