类分层结构
- java.lang.Object
- java.awt.Component (implements java.awt.image.ImageObserver, java.awt.MenuContainer, java.io.Serializable)
- java.awt.Container
- java.awt.Window (implements javax.accessibility.Accessible)
- java.awt.Frame (implements java.awt.MenuContainer)
- javax.swing.JFrame (implements javax.accessibility.Accessible, javax.swing.RootPaneContainer, javax.swing.WindowConstants)
- com.fr.third.apache.log4j.chainsaw.Main