Building a GUI in Java With Swing

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Building a GUI in Java With Swing

• Dave Elliman

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Useful References

• Suns Swing tutorial
• http//java.sun.com/docs/books/tutorial/uiswing/in
  dex.html

Java Swing, 2nd Edition By Marc Loy,
Robert Eckstein, Dave Wood, James Elliott,
Brian Cole2nd Edition November 2002 ISBN
0-596-00408-71278 pages, 38.95 UK
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Event-driven Programming

• So far you have a model of a program which starts
  at main() and continues until the end of the
  program.
• Event-driven programming is rather different. We
  start with main() and build the GUI and then
  await events.

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What Events?

• Mouse clicks or double clicks
• Menu selections
• Text entered
• Several more possibilities
• Window closing (click on the little x in the
  corner)

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What Sort of Objects Might We Need?

• Labels (fixed text)
• TextAreas (enter some text)
• Buttons
• Check boxes
• Radio buttons
• Tables
• Menus toolbars etc

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The Building Blocks
A JFrame
Images taken from the Sun Swing Tutorial
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JTextField and JLabel
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Buttons
Toolbar
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JList and JComboBox
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A Menu
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Panels and Panes
Tabbed Pane
Split Pane
Scroll Pane
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Various Indicators
Spinner
Slider
Progress Bar
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A Dialog Box
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JFileChooser
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Colour Chooser
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Jtable
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JTree
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Various Text Fields
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All These Are COMPONENTS

• You can add LISTENERS which will respond to the
  appropriate events.
• An Event is an object that was introduced in an
  earlier Java set of GUI classes known as AWT.

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Events and Listeners

• User clicks a button, presses Return while
  typing in a text field, or chooses a menu item
  ActionListener
• User closes a frame (main window) WindowListener
• User presses a mouse button while the cursor is
  over a component MouseListener or User moves the
  mouse over a component MouseMotionListener

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For Better Examples
http//java.sun.com/products/jfc/tsc/sightings/
Lets do it for real.