"C:\Program Files\Java\jdk-11.0.14\bin\java.exe" "-javaagent:C:\Program Files\JetBrains\IntelliJ IDEA Community Edition 2021.3.2\lib\idea_rt.jar=50104:C:\Program Files\JetBrains\IntelliJ IDEA Community Edition 2021.3.2\bin" -Dfile.encoding=UTF-8 -classpath C:\Users\ASUS\IdeaProjects\1\out\production\untitled com.View.Main
Exception in thread "main" java.lang.IllegalArgumentException: adding container's parent to itself
at java.desktop/java.awt.Container.checkAddToSelf(Container.java:501)
at java.desktop/java.awt.Container.addImpl(Container.java:1114)
at java.desktop/java.awt.Container.add(Container.java:436)
at com.View.LoginDemo.(Main.java:34)
at com.View.Main.main(Main.java:6)
代码中将容器的父项添加到自身容器中了，所以出现了异常。
main函数中出现了非法数据异常