Lab 12: Graphical User Interfaces (GUI's) in Java
For most of the relevant Information on how to build GUIs in Java, see the following reference: Java GUI Programming Primer
The content below discusses material not explicitly covered in the above reference.
Basic structure of a simple GUI application:
import java.awt.*; import javax.swing.* import java.awt.event.*; class MyGUIApp extends JFrame { /** * Constructor for the GUI. */ public MyGUIApp() { // initialize fields here. initGUI(); // initialize the GUI components } /** * Actually start the GUI */ public void start() { // Do any last second initializations, if needed. setVisible(true); // Make the GUI visible } /** * Initialize the GUI components */ private void initGUI() { setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); // Causes the application to end if the GUI frame is closed. // instantiate, initialize and connect all the GUI's components here. } /** * Main method that starts the app. * In general, this would not be in this class but rather in a separate "controller" class * with slightly different coding (as required for a true Model-View-Controller system). * We put it here for now, for simplicity's sake only. */ public static void main(String[] args) { MyGUIApp view = new MyGUIApp(); // instantiate the GUI but don't show it yet. // Model classes would be instantiated here plus any other required objects. view.start(); // Start the application by making the GUI visible. } }