I developed the interface similar to the WebLogic console with JBuilder 2005. Use the applet to implement a general tree to control the calls and display of the page. It is normal to display everything under the browser in jbuiler2005. But browsing in the external IE cannot be loaded into the applet. By debugging finding problems in the layout manager. Because it is convenient for the layout of the pull control, I like to use XYLAYOUT's layout, but Java itself does not have XYLAYOUT layout manager. So when you browse the external IE, you will not be loaded, so the solution is to use the Java itself's layout manager or put the XYLAYOUT manager's package in the relevant web application directory.