D:\work>javac JComboBoxDemo.java
D:\work>java JComboBoxDemo
Exception in thread "main" java.lang.IllegalArgumentException: adding container'
s parent to itself
at java.awt.Container.checkAddToSelf(Unknown Source)
at java.awt.Container.addImpl(Unknown Source)
at java.awt.Container.add(Unknown Source)
at JComboBoxDemo.go(JComboBoxDemo.java:61)
at JComboBoxDemo.main(JComboBoxDemo.java:12)
D:\work>
以上是我的程序运行情况,如有你知道点什么,给我留言
附件是我的java程序