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How are GUI components attached to a container?
When building a GUI, each GUI component must be attached to a container, such as a window created with a JFrame. Many IDEs provide GUI design tools in which you can specify the exact size and location of a component by using the mouse, then the IDE will generate the GUI code for you.
Where are the GUI components located in Java?
Most Swing GUI components are located in package javax.swing. They are part of the Java Foundation Classes (JFC)—Java’s libraries for cross-platform GUI development. Together, the appearance and the way in which the user interacts with the application are known as that application’s look-and-feel.
What are the components of a GUI program?
GUIs are built from GUI components—sometimes called controls or widgets. Most applications use windows or dialog boxes (also called dialogs) to interact with the user. Class JOptionPane(package javax.swing) provides prepackaged dialog boxes for both input and output. JOptionPanestaticmethod showInputDialogdisplays an input dialog.
Why are GUIs so difficult to write in Java?
Another factor that makes writing GUIs challenging is that the path of code execu- tion becomes nondeterministic. When a GUI program is running, the user can click any of the buttons and interact with any of the other onscreen components in any order.
Why are GUI programs called event driven programs?
When a GUI program is running, the user can click any of the buttons and interact with any of the other onscreen components in any order. Because the program’s execution is driven by the series of events that occur, we say that programs with GUIs are event-driven.
What is the name of the GUI library in Java?
(“Swing” is the name of one of Java’s GUI libraries.) Note that the package name starts with javaxthis time, not java. The xis because, in Java’s early days, Swing was an extension to Java’s feature set.