JComponents

Question 1

All Swing components that start with J descend from the JComponent class except…

Answer 1

…JFrame, JDialog, JApplet

Question 2

setToolTipText

Answer 2

Hover over component –> specified string is displayed in a small window that appears near the component

Question 3

setBorder

Answer 3

Allows for setting the border displayed around its edges

Question 4

Paint the inside of a component

Answer 4

Override the paintComponent method

Question 5

ComponentUI

Answer 5

For JComponents, performs all the drawing, event handling, size determination, etc so JComponent is relative to the current look and feel
Set using UIManager.setLookandFeel method

Question 6

putClientProperty and getClientProperty methods

Answer 6

Associating one or more properties with any JComponent

Question 7

JComponent Support for Layout

Answer 7

setMinimumSize, setMaximumSize, setAlignmentX, and setAlignmentY

Question 8

JComponent Support for Accessability

Answer 8

Provides API and basic functionality to help assistive technologies like screen readers getting information from Swing components

Question 9

JComponent Support for Drag and Drop

Answer 9

Provides API to set a component’s transfer handler, which is the basis for Swing’s drag and drop support

Question 10

Double Buffering

Answer 10

Smooths on-screen painting

Question 11

Key Bindings

Answer 11

Makes components reach when the user presses a key on the keyboard

Question 12

Swing text components

Answer 12

JTextField
JFormattedTextField
JPasswordField
JTextArea
JEditorPane
JTextPane