Java How to Program (early objects), 9/e

14.5 Displaying Text and Images in a Window

Our next example introduces a framework for building GUI applications. Several concepts in this framework will appear in many of our GUI applications. This is our first example in which the application appears in its own window. Most windows you’ll create that can contain Swing GUI components are instances of class JFrame or a subclass of JFrame. JFrame is an indirect subclass of class java.awt.Window that provides the basic attributes and behaviors of a window—a title bar at the top, and buttons to minimize, maximize and close the window. Since an application’s GUI is typically specific to the application, most of our examples will consist of two classes—a subclass of JFrame that helps us demonstrate ...