April 4, 2011, 9:21 p.m.
posted by evil
Objects shown on the screen are displayables. Displayables include both structured and unstructured screens. See "Characteristics of the MIDP Environment" on page 18 for more information on structured and unstructured screens, and Programming Wireless Devices with the Java™ 2 Platform, Micro Edition  for information on the Displayable API.
Displayables can have a title and a ticker and should have one or more abstract commands. (See Chapter 12 for more information on abstract commands.) Displayables might also have additional elements, such as activity indicators for network activity, battery life, and scrolling. This chapter has advice for laying out these elements.