This tutorial shows how to modify your application to use the correct look and feel for the platform. http://blog.codebeach.com/2008/02/native-look-and-feel-in-java.html
This tutorial provides an introduction to using the glass pane in a JFrame and JApplet. http://www.codebeach.com/tutorials/introduction-to-glasspanes.asp
This tutorial shows how to change the default close action to exit the application when the window is closed. http://blog.codebeach.com/2008/02/exiting-application-when-jframe-is.h...
When using the JFileChooser to dialog to save files, you will usually want to give the user a list of types that they can save the file as. http://www.codebeach.com/index.asp