Podcast
Questions and Answers
What does AWT stand for?
What does AWT stand for?
- All windows Tools
- Abstract Window Toolkit (correct)
- All Window Toolkit
- All writing Tools
Which event is generated when a button is pressed?
Which event is generated when a button is pressed?
- FocusEvent
- KeyEvent
- ActionEvent (correct)
- WindowEvent
Which method is used to change the location of an event?
Which method is used to change the location of an event?
- isPopupTrigger()
- getClickCount()
- getPoint()
- translatePoint() (correct)
What is the return type of actionPerformed(ActionEvent e)?
What is the return type of actionPerformed(ActionEvent e)?
What types of dialog boxes are there?
What types of dialog boxes are there?
Which method can be used on any instance of java.awt.Component?
Which method can be used on any instance of java.awt.Component?
Which class serves as the superclass of all events in Java?
Which class serves as the superclass of all events in Java?
What is the default layout manager for a Panel or Applet?
What is the default layout manager for a Panel or Applet?
Which method will be called when a character is typed in an input component?
Which method will be called when a character is typed in an input component?
What is the correct way to set a label's text in Java using jlbl variable?
What is the correct way to set a label's text in Java using jlbl variable?
Which package is required to use Swing components?
Which package is required to use Swing components?
Which of the following constructors is used to create a JButton with a label?
Which of the following constructors is used to create a JButton with a label?
What type of component can be styled with their own look and feel in Java?
What type of component can be styled with their own look and feel in Java?
Which object is required to group Checkboxes to ensure only one can be selected at a time?
Which object is required to group Checkboxes to ensure only one can be selected at a time?
What class represents a Checkbox with a textual label in a menu?
What class represents a Checkbox with a textual label in a menu?
Which layout is the default for both JPanel and Applet?
Which layout is the default for both JPanel and Applet?
Which method cannot be called on a JLabel object?
Which method cannot be called on a JLabel object?
Which pane can be utilized to add components to a container?
Which pane can be utilized to add components to a container?
What is the primary purpose of a JTable?
What is the primary purpose of a JTable?
Which of the following is a valid AWT control?
Which of the following is a valid AWT control?
Which of the following classes is used for GUI components in Java?
Which of the following classes is used for GUI components in Java?
What is the default layout for JFrame?
What is the default layout for JFrame?
Which class components can display icons in addition to strings?
Which class components can display icons in addition to strings?
Which layout is used to arrange components in a rectangular area?
Which layout is used to arrange components in a rectangular area?
What is the return type of the getSelectedItem method in the choice class?
What is the return type of the getSelectedItem method in the choice class?
Which method triggers adjustmentValueChanged in AdjustmentListener interface?
Which method triggers adjustmentValueChanged in AdjustmentListener interface?
What is the return type of the getRed() method?
What is the return type of the getRed() method?
Which listener interface does the Button class implement?
Which listener interface does the Button class implement?
What is the return type of the getItemCount() method?
What is the return type of the getItemCount() method?
Which class uses the constants BLOCK_DECREMENT and BLOCK_INCREMENT?
Which class uses the constants BLOCK_DECREMENT and BLOCK_INCREMENT?
What is the default layout for Applet?
What is the default layout for Applet?
Which interface does JToggleButton implement?
Which interface does JToggleButton implement?
Which method is used to obtain a reference to the JCheckBox object that generated the event?
Which method is used to obtain a reference to the JCheckBox object that generated the event?
In Swing, a Radio Button is created using which component?
In Swing, a Radio Button is created using which component?
What does the following line of code do? 'TextField t=new TextField(10);'
What does the following line of code do? 'TextField t=new TextField(10);'
The setBackground() method() is a part of which class in the java.awt package?
The setBackground() method() is a part of which class in the java.awt package?
Which method can be used to remove a java.awt.Component object from display?
Which method can be used to remove a java.awt.Component object from display?
What are controls or components in a user interface?
What are controls or components in a user interface?
Which of the following can be considered subclasses of Swing components?
Which of the following can be considered subclasses of Swing components?
Study Notes
Applet Output Methods
- Use
drawString()method to output a string in an applet.
AWT Overview
- AWT stands for Abstract Window Toolkit.
User Interaction Events
ActionEventis generated when a button is pressed.
JDK Structure
- AWT Viewer tool is found in the
binfolder of JDK.
Event Handling
setAlignment()returns typevoid.- Use
translatePoint()method to change the location of an event. actionPerformed(ActionEvent e)returns typevoid.itemStateChanged(ItemEvent ie)returns typeint.
Dialog Boxes
- Types of dialog boxes include Model & Modeless.
Font and Style
- Use
Font.BOLD + Font.ITALICto specify a font styled as both bold and italic.
Component Methods
- Use
setForeground,setBackground, andsetFontmethods onjava.awt.Componentinstances. TextFieldcan be used to enter or display a string.- Use
jlbl.setText("Result")method to assign the name 'Result' tojlbl.
Key Press Methods
KeyTyped()method is invoked if a character is entered.
Event Classes Hierarchy
Appletis the super class of all adapter classes.ComponentEventis the super class of allContainerEventclasses.EventObjectserves as the super class of all events.
Swing Components
- Swing allows components to have their own look and feel.
- To create a button with a label, use
JButton(String str)constructor. - Use
javax.swingpackage to utilize Swing components.
Layout Managers
- Default layout manager for Panel or Applet is
FlowLayout. BorderLayoutis the default layout manager for Frame and JFrame.GridLayoutis utilized for arranging components in a 3-dimensional array.
Color Methods
getRed(),getGreen(), andgetBlue()return typeColor.
Button and CheckBox Interfaces
- Button class implements
ActionListener. - CheckBox class implements
ItemListener. - ScrollBar implements
AdjustmentListener.
Action Events and Listeners
ActionEventbelongs to Button class.addTab()method belongs toJTabbedPane.getPath()returns typeTreePath.
Tree Nodes and Interfaces
DefaultMutableTreeNodeimplementsMutableTreeNode.getIcon()method return type isIcon.
Radio Buttons and Check Boxes
ButtonGroupis used to create radio buttons.- Exclusive checkboxes require
CheckboxGroup.
Control Classes
- Various AWT controls include Labels, Push buttons, Checkboxes, and Choice lists.
JPanel and Default Layouts
- JPanel and Applet use
FlowLayoutas their default layout.
JTable Usage
JTableobject displays rows and columns of data.
JLabel Restrictions
setBordeLayout()cannot be called on a JLabel object.
Content Pane
ContentPanecan be used to add components to a container.
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Description
Test your knowledge on Java applet programming concepts with this quiz. It covers various methods, events, and frameworks related to applets and AWT. Challenge yourself and see how well you understand the fundamentals of Java applet development.
