Gives program distinctive “look” and “feel”
Provides users with basic level of familiarity
Built from GUI components (controls, widgets, etc.)
User interacts with GUI component via mouse, keyboard, etc.
Class Component
Contains method paint for drawing Component onscreen
Class Container
Collection of related components
Contains method add for adding components
Class JComponent
Pluggable look and feel for customizing look and feel
Shortcut keys (mnemonics)
Common event-handling capabilities
Label
Provide text on GUI
Defined with class JLabel
Can display:
Single line of read-only text
Image
Text and image
Event-handling model
Three parts
Event source
GUI component with which user interacts
Event object
Encapsulates information about event that occurred
Event listener
Receives event object when notified, then responds
Programmer must perform two tasks
Register event listener for event source
Implement event-handling method (event handler)
JTextField
Single-line area in which user can enter text
JPasswordField
Extends JTextField
Hides characters that user enters
Two open questions from Section 13... displayed 300 characters
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Gives program distinctive “look” and “feel”
Provides users with basic level of familiarity
Built from GUI components (controls, widgets, etc.)
User interacts with GUI component via mouse, keyboard, etc.
Class Component
Contains method paint for drawing Component onscreen
Class Container
Collection of related components
Contains method add for adding components
Class JComponent
Pluggable look and feel for customizing look and feel
Shortcut keys (mnemonics)
Common event-handling capabilities
Label
Provide text on GUI
Defined with class JLabel
Can display:
Single line of read-only text
Image
Text and image
Event-handling model
Three parts
Event source
GUI component with which user interacts
Event object
Encapsulates information about event that occurred
Event listener
Receives event object when notified, then responds
Programmer must perform two tasks
Register event listener for event source
Implement event-handling method (event handler)
JTextField
Single-line area in which user can enter text
JPasswordField
Extends JTextField
Hides characters that user enters
Two open questions from Section 13... displayed 300 characters
