Exception in thread "main" java.lang.SecurityException: Prohibited package name: java

报错的具体内容如下：

Exception in thread "main" java.lang.SecurityException: Prohibited package name: java
	at java.lang.ClassLoader.preDefineClass(ClassLoader.java:659)
	at java.lang.ClassLoader.defineClass(ClassLoader.java:758)
	at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
	at java.net.URLClassLoader.defineClass(URLClassLoader.java:455)
	at java.net.URLClassLoader.access$100(URLClassLoader.java:73)
	at java.net.URLClassLoader$1.run(URLClassLoader.java:367)
	at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.net.URLClassLoader.findClass(URLClassLoader.java:360)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
	at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:495)

出错的原因是：项目的包名不能和JDK的报名冲突，建议跟换一个其他的包名，即可解决问题。