Exam 14: Introduction to Swing Components

Which of the following statements will correctly set a JFrame named myFrame to be visible?

The ____ method of JComboBox returns the maximum number of items the combo box can display without a scroll bar.

Assume you have declared a JFrame named welcomeFrame. Write the statement to set the welcomeFrame object's size to 300 pixels horizontally by 110 pixels vertically. Create a second statement to set the JFrame's title to display the text "My Sized Frame".

An object that is interested in an event is called a source.

A ____ is a component that combines two features: a display area showing an option, and a list box containing additional options.

Java provides you with a Font class from which you can create an object that holds typeface and size information.

Match each term with the correct statement below. -A class that controls component positioning

What is the immediate parent class of JTextField?

A component can be made available or unavailable by passing true or false to the ____ method.

Match each term with the correct statement below. -A JTextField that has the capability of accepting keystrokes

The default behavior of a JFrame is to use the BorderLayout format, which divides a container into regions.

If a user enters more characters than specified in a JTextField, the extra characters scroll out of view.

When a JFrame is closed, you can end a program that you have forgotten to exit by typing Ctrl+E.

Match each term with the correct statement below. -A method that executes because it is called automatically when an appropriate event occurs

The ____ responds to keyboard focus events.

How do you change the text of a JLabel? Provide an example.

The JLabel constructor ____ creates a JLabel instance with the specified image and horizontal alignment.

The Swing classes are part of a more general set of UI programming capabilities that are collectively called the ____.

What are the four JFrame constructors?

import javax.swing.*; import java.awt.*; public class JFrame6 { public static void main(String[] args) { final int FRAME_WIDTH = 250; final int FRAME_HEIGHT = 100; JFrame aFrame = new JFrame("Sixth frame"); aFrame.setSize(FRAME_WIDTH, FRAME_HEIGHT); aFrame.setVisible(true); aFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); JLabel greeting = new JLabel("Hello"); JLabel greeting2 = new JLabel("Who are you?"); _________________________ aFrame.add(greeting); aFrame.add(greeting2); } } Using the above code, write the FlowLayout statement in the blank line provided that will display the two greeting JLabels side by side.