Marquee Project (Extra Credit
Assignment due 12/7)
A marquee is a text field and a thread. The thread constantly
scrolls the contents of the text field. Java doesn't allow multiple inheritance,
so you'll have to implement the runnable interface (see the text or the
online tutorial):
class Marquee extends TextField
implements Runnable { ... }
Because Java strings are not mutable (i.e., they're constants), you may
want to keep the scrolling message in a StringBuffer (see your online documentation).
You marquee should provide methods to allow clients to fetch and change
the message and scrolling speed, but not simultaneously.
A marquee panel contains a marquee, pause and resume buttons,
and a scrollbar that allows users to adjust the scrolling speed:
class MarqueePanel extends
Panel { ... }
Users can type new messages directly into the marquee.
Build an applet with at least one marquee panel similar to this one:
Your applet should pause the scrolling when the user moves off the web
page, and resume it when the user moves back onto the web page.
You can find a sample at
http://www.mathcs.sjsu.edu/faculty/pearce/java1/threads/marquee/marquee.html
Either use your applet viewer or a JDK 1.1 enabled browser.