ion 1 What is the name for Java classes that are provided so

ion 1

What is the name for Java classes that are provided so that values of primitive data types can be treated as objects?

interfaces

extensions

wrappers

event handlers

1 points   

Question 2

Write a program to input the radius of the base and height of a cylinder, and calculate and print the surface area, volume, and area of the base of the cylinder.

Which words from the problem statement above could we use to determine the operations for this program?

input, calculate, print

cylinder, program, volume

height, cylinder, radius

radius, cylinder, print

1 points   

Question 3

Which of the following is not a method of the class JTextField?

setText

setEditable

addActionListener

setVisible

1 points   

Question 4

Which of the following methods is NOT part of the class JFrame?

setVisible

setSize

setTitle

getText

1 points   

Question 5

Show output

Get input

Get input and show results

Display a prompt to the user

1 points   

Question 6

To create a window, which of the following classes has to be extended?

Container

JFrame

JButton

JTextField

1 points   

Question 7

To display a window, you must invoke the method ____.

displayWindow

show

setVisible

setDisplay

1 points   

Question 8

The Java class that you use to create windows is ____.

JTextField

JFrame

JButton

JLabel

1 points   

Question 9

Which method is used to register a listener object to a button object?

addActionListener

registerButton

eventButton

buttonListener

1 points   

Question 10

A(n) ____ is a method of a class that is automatically executed when an object of the class is created.

inheritance

package

constructor

interface

1 points   

Question 11

Which package will you most likely have to import in order to write a GUI program?

java.awt.*

java.io.*

java.text.*

java.net.*

1 points   

Question 12

Write a program that takes as input the pay rate and hours worked of an employee and calculates the pay of the employee.

Based on the problem statement above, which of the following would most likely be chosen as the class?

Pay_Rate

Hours_Worked

Employee

Pay

1 points   

Question 13

Which method contains the code that the program executes when a specific event is generated?

buttonListener

GUIListener

actionPerformed

windowListener

1 points   

Question 14

If Shape is a class and you create a new class Rectangle that extends Shape, then Shape is a(n) ____ and Rectangle is a(n) ____.

Which word goes in the second blank of the sentence above?

subclass

superclass

method

package

1 points   

Question 15

Which class is part of the package java.awt?

JFrame

JButton

JOptionPane

Container

1 points   

Question 16

Write a program that takes as input the pay rate and hours worked of an employee and calculates the pay of the employee.

Based on the problem statement above, which of the following would be a data member?

hoursWorked

employee

pay

job

1 points   

Question 17

Calculate

Exit

Both Calculate and Exit

Perimeter

1 points   

Question 18

Write a program to input the radius of the base and height of a cylinder, and calculate and print the surface area, volume, and area of the base of the cylinder.

According to the problem statement above, which of the following would be a data member?

Radius of the base

Surface area

Volume

Input

1 points   

Question 19

Which of the following sets the window width to 100 pixels and the height to 200 pixels?

setSize(100, 200);

setSize(200, 100);

setDims(100, 200);

set(200, 100);

1 points   

Question 20

Which of the following is NOT a required attribute of a window?

title

width

height

color

		interfaces
		extensions
		wrappers
		event handlers

Solution

Hi, I have answered frist 6 questions.

Please repost others in separate post.

Please let me knwo in case of any issue in answered part.

Q1.
   wrapper

   Wrappers are the classes that provides the object for each primitive type

Q2.
   height, cylinder, radius

   First we need container information, here is cylinder
   THen to calculate volume and area, we need radius and height

Q3.
   setVisible : it is part of JComponent

Q4.
   getText is not part of JFrame

Q5.
   Image is not visible

Q6.
   JFrame : you need to extend this class to create your own Frame class

Q7.
   setVisible : you need to make setVisible(true)