Java™ Application Development on Linux - Dator

16.11 Exercises375filesystem tree familiar to many PC users, the JTree allows you to view multiplelevels at once and to open and close nodes, exposing or hiding their subtrees.It would make more sense to use the JTree in our example, but then wewouldn’t have been able to describe all the ins and outs of the JTable, a classthat is so useful in so many applications.There are many more Swing classes that we haven’t discussed, thoughmany will behave similarly to those you have seen here. There are topics thatwe have avoided—for example, we haven’t talked about sorting JTables byclicking on the column headings, or about TableColumnModels which addanother layer to JTables. Some of what you would need to know in order touse these Swing classes you can glean from the Javadoc pages. The informationthere should make more sense now, based on your experience with the variousSwing mechanisms that you’ve seen in these pages. For some other Swing topicsyou will have to search farther, and there are plenty of books on the topic—theclassic one, the The JFC Swing Tutorial from Sun, being over 900 pages long.Is it any wonder that we didn’t cover it all in this chapter?16.10RESOURCES• The JFC Swing Tutorial: A Guide to Constructing GUIs by Kathy Walrathand Mary Campione, Addison-Wesley, also available online athttp://java.sun.com/docs/books/tutorial/uiswing/index.html.• Our favorite bookmark within the Swing tutorial, the visual index of thevarious Swing components, is at http://java.sun.com/docs/books/tutorial/uiswing/components/components.html.• If you want a better understanding of layout managers, we recommendthis tutorial by Jan Newmarch at Monash University in Australia:http://pandonia.canberra.edu.au/java/xadvisor/geometry/geometry.html. Don’t let the mention of AWT scare you away. Almostall of the layout managers (except BoxLayout and SpringLayout) areactually from AWT, and they all apply to Swing.16.11EXERCISES1. Use different layout managers to create of the status area of the BudgetPromain window, laying out the status information differently. Make the