Java Swing Layout and Methods Quiz

Questions and Answers

Which method is used to determine the position and shape of a component manually?

setBounds() (correct)

setLayout()

getLayout()

setPosition()

Which of the following LayoutManagers is consulted whenever the container needs to be resized?

minimumLayoutSize()

both minimumLayoutSize() and maximumLayoutSize()

maximumLayoutSize()

preferredLayoutSize() (correct)

What are the two methods contained by each LayoutManager?

getMinimumSize(),getMaximumSize()

getPreferredSize(),getMinimumSize() (correct)

getSize(),getOptimalSize()

getPreferredSize(),getMaxSize()

Which of these is the default LayoutManager in Java?

BorderLayout() Signup and view all the answers

Which constructors are available for FlowLayout?

All of the above Signup and view all the answers

Which classes are required to implement a menu bar in AWT?

MenuBar, Menu, MenuItem Signup and view all the answers

In the constructor FlowLayout(int how, int horz, int vert), which values can 'how' take?

FlowLayout.LEFT, FlowLayout.CENTER, FlowLayout.RIGHT Signup and view all the answers

What constants does BorderLayout use to position components?

BorderLayout.CENTER, BorderLayout.SOUTH, BorderLayout.EAST, BorderLayout.WEST, BorderLayout.NORTH Signup and view all the answers

What is the correct constructor format for the TextEvent class in AWT?

TextEvent(Object source, int event_type) Signup and view all the answers

Which layout positions components into five regions: east, west, north, south, and center?

BorderLayout Signup and view all the answers

GridLayout lays out components in a __ grid.

Two-dimensional Signup and view all the answers

What does FlowLayout do?

Arranges components sequentially, wrapping as needed Signup and view all the answers

What are the constructors of CardLayout?

Both Signup and view all the answers

What component creates a dropdown list of textual entries in AWT?

Choice Signup and view all the answers

If an event in AWT indicates that the internal state of the event source is __________, it has been generated.

Changed Signup and view all the answers

What type of object holds the cards in a CardLayout?

Container Signup and view all the answers

Which methods belong to CardLayout?

All Signup and view all the answers

Which layout arranges components as a deck of cards so that only one component is visible at a time?

CardLayout Signup and view all the answers

A checkbox control in AWT typically consists of which elements?

A combination of a small box and a label Signup and view all the answers

Dialog boxes can be categorized as which states?

Modal, Modeless Signup and view all the answers

What is true about a modal dialog box?

You cannot access other parts of your program until you have closed the dialog box. Signup and view all the answers

Which statement is true regarding modeless dialog boxes?

Input focus can be directed to another window in your program. Signup and view all the answers

What are the constructors of a dialog box?

Dialog(Frame parentWindow, boolean mode), Dialog(Frame parentWindow, String title, boolean mode) Signup and view all the answers

To create a file dialog box, you must instantiate what type of object?

FileDialog of type FileDialog Signup and view all the answers

Study Notes

Layout Manager Methods

setText(): Sets the text of a component.
getText(): Retrieves the text of a component.
setLayout(): Defines the layout manager for a container.
setVisible(): Controls the visibility of a component.

Component Positioning

To manually determine the position and shape of a component, use setBounds().
setPosition() is not a valid method for this purpose.

Layout Manager Resizing

Layout managers are consulted when resizing, using methods like minimumLayoutSize() and preferredLayoutSize().
Both methods play a role in determining space allocation during resizing.

Layout Manager Properties

Each layout manager contains methods such as getPreferredSize() and getMinimumSize() to determine component sizes.
Correct casing is important: getPreferredSize(), getMinimumSize().

Default Layout Manager

The default layout manager for containers is BorderLayout().

FlowLayout Constructors

Several constructors are available for FlowLayout:
- FlowLayout()
- FlowLayout(int how)
- FlowLayout(int how, int horz, int vert)

FlowLayout Directions

In FlowLayout(int how, int horz, int vert), the how parameter can be set to FlowLayout.LEFT, FlowLayout.CENTER, or FlowLayout.RIGHT.

BorderLayout Constructors

BorderLayout has constructors:
- BorderLayout()
- BorderLayout(int horz, int vert)
Constructors do not include BorderLayout(int how, int horz, int vert).

BorderLayout Constants

Constants for BorderLayout:
- BorderLayout.CENTER
- BorderLayout.NORTH
- BorderLayout.SOUTH
- BorderLayout.EAST
- BorderLayout.WEST

GridLayout Characteristics

GridLayout arranges components in a two-dimensional grid layout.

GridLayout Constructors

GridLayout constructors include:
- GridLayout()
- GridLayout(int numRows, int numColumns)
- GridLayout(int numRows, int numColumns, int horz, int vert)

CardLayout Properties

CardLayout allows for multiple components to be stored and only one to be visible at a time.

AWT Controls

AWT supports various controls including:
- Labels
- Push buttons
- Checkboxes
- Choice lists
- Scroll bars
- Text areas
- Text fields

Implementing a menu bar in Java requires:
- MenuBar
- Menu
- MenuItem

TextEvent Constructor

The constructor defined for the TextEvent class is TextEvent(Object source, int event_type).

Java Event Definition

An event in Java is an object that indicates a change in state of the source.

AWT Package

Classes and interfaces in AWT are located within the java.awt.* package.

Setting Layout Manager

Specify layout manager using void setLayout(LayoutManager lm).

AWT Container Class

The AWT container is an instance of the Container class that can hold various components.

Checkbox Control

A checkbox control is a combination of a small box and a label.

Java Applets

Java applets are utilized for creating graphical and user-interactive applications.

AWT Definition

AWT stands for Abstract Window Toolkit.

Event Generation

An event is generated when the internal state of the event source is changed.

Layout Types

BorderLayout positions components in five regions: east, west, north, south, and center.
CardLayout arranges components like a deck of cards.
GridLayout organizes components in a grid format.
FlowLayout arranges components in a horizontal flow.

Choice Component

Choice creates a dropdown list of textual entries.

Component Class

The Component class is abstract; its subclasses are utilized to create actual UI components.

CardLayout Constructors

Constructors for CardLayout include:
- CardLayout()
- CardLayout(int horz, int vert)

Cards Storage

Cards in a CardLayout are held in a Panel type object.

CardLayout Methods

Methods available in CardLayout include:
- void first(Container deck)
- void last(Container deck)
- void next(Container deck)
- void previous(Container deck)
- void show(Container deck, String cardName)

Dialog Box Types

Dialog boxes can be modal or modeless.

In a modal dialog box, access to other parts of the program is restricted until the box is closed.

Modeless Dialog Box Properties

A modeless dialog box allows access to other parts of the program while it remains open.

Dialog Box Constructors

Constructors for dialog boxes include:
- Dialog(Frame parentWindow, boolean mode)
- Dialog(Frame parentWindow, String title, boolean mode)

File Dialog Box

To create a file dialog box, instantiate an object of type FileDialog.

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Description

Test your knowledge of Java Swing methods and layout management with this quiz. Questions cover key methods like setText(), getText(), and layout management techniques. Gauge your understanding of component positioning and resizing in Java applications.