Starting Out with Java: From Control Structures through Data Structures (3rd Edition)
3rd Edition
ISBN: 9780134038179
Author: Tony Gaddis, Godfrey Muganda
Publisher: PEARSON
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Expert Solution & Answer
Chapter 12, Problem 2FTE
Explanation of Solution
The given statement:
//define a class which implements ActionListener
private class ButtonListener implements ActionListener
{
//override the method actionPerformed()
public void actionPerformed()
{
// Code appears here.
}
}
Error in the code:
The “actionPerformed()” method must have an “ActionEvent” parameter...
Expert Solution & Answer
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Check out a sample textbook solution
Students have asked these similar questions
Purpose
To review interfaces
Directions
Your task for this lab is to implement and test a class to store ratings of items. Your
Rating class should have the following fields and methods:
private double sumOfRatings - the sum of all of the ratings
private int raters - the number of people who have rated an item
public Rating () initialize both fields to zero
public Rating (double sumofRatings, int raters) - initialize the fields
to the parameter values
public void addRating (double newRating) - increase the sumOfRatings by
newRating and increase the number of raters by one
public double getAverageRating () return the average rating; if there
are no raters so far, return 0.0
public String toString() - display the average rating and how many
reviews it is based on; for example, if the sum of the ratings is 32
and that is based on ratings from ten people, the toString method will
return "3.2 based on 10 reviews"
Slide Type Slide
• Exercise # 1: Define a class Point that represents a point in 2 – D plane. The point has x and y coordinates. Define the following:
• A constructor to initialize the x, y coordinates.
• A method translate(self, dx,dy) to translate the point object dx , and dy units in x and y directions, respectively.
• A method distanceTo (self, point2) to return the distance between the point referenced by self and point2.
• getX(self) to return the value of x coordinate.
• getY(self) to return the value of y coordinate
Test the above class by:
• Creating 2 point objects; one with (3,5) as x,y coordinates; the second with (-10,30) as x,y coordinates.
• Move the first point 5.5 units in x direction and -12.5 units in y direction using translate method
• Find the distance between the 2 points in their current location using distance To method
A Sample output resulting from running the above test class is shown below
new coordinates of point1= (8.5 , -7.5)
Coordinates of point 2 =…
please modify this: display method must call displayNormal
Window class
abstract class Window implements GUIComponent {private int height, width;private boolean isThisVisible, minimized;
public Window(int width, int height){this.height = height;this.width = width;}
public int getHeight() {return height; }
public int getWidth() {return width; }
public String toString() { return "a " + width + "x" + height + " minimal window"; }public void resize(int width, int height){this.width = width;this.height = height;}public void display() {if (!isThisVisible) {System.out.println("(Nothing to see here)");}else if (!minimized) { System.out.println(".......................\n:" + toString() + ":\n.......................");}
else {System.out.println("[" + this.toString() + " (minimized)]");}
}public void minimize(){ minimized = true;}
public void setVisible(boolean isThisVisible) { this.isThisVisible = isThisVisible; }public void restore(){ minimized=false;}
public boolean isVisible() { return…
Chapter 12 Solutions
Starting Out with Java: From Control Structures through Data Structures (3rd Edition)
Ch. 12.2 - Prob. 12.1CPCh. 12.2 - Prob. 12.2CPCh. 12.2 - Prob. 12.3CPCh. 12.2 - Prob. 12.4CPCh. 12.2 - Prob. 12.5CPCh. 12.2 - Prob. 12.6CPCh. 12.2 - If you are writing an event listener class for a...Ch. 12.2 - Prob. 12.8CPCh. 12.2 - Prob. 12.9CPCh. 12.3 - Prob. 12.10CP
Ch. 12.3 - Prob. 12.11CPCh. 12.3 - Which layout manager arranges components in a row,...Ch. 12.3 - Prob. 12.13CPCh. 12.3 - Prob. 12.14CPCh. 12.3 - Prob. 12.15CPCh. 12.3 - Prob. 12.16CPCh. 12.3 - Prob. 12.17CPCh. 12.4 - Prob. 12.18CPCh. 12.4 - Prob. 12.19CPCh. 12.4 - Prob. 12.20CPCh. 12.4 - Prob. 12.21CPCh. 12.4 - Prob. 12.22CPCh. 12.4 - Prob. 12.23CPCh. 12.4 - Prob. 12.24CPCh. 12.4 - Prob. 12.25CPCh. 12.5 - Prob. 12.26CPCh. 12.5 - Prob. 12.27CPCh. 12 - With Swing, you use this class to create a frame....Ch. 12 - Prob. 2MCCh. 12 - Prob. 3MCCh. 12 - Prob. 4MCCh. 12 - Prob. 5MCCh. 12 - Prob. 6MCCh. 12 - Prob. 7MCCh. 12 - Prob. 8MCCh. 12 - Prob. 9MCCh. 12 - Prob. 10MCCh. 12 - Prob. 11MCCh. 12 - Prob. 12TFCh. 12 - Prob. 13TFCh. 12 - Prob. 14TFCh. 12 - Prob. 15TFCh. 12 - Prob. 16TFCh. 12 - Prob. 17TFCh. 12 - Prob. 18TFCh. 12 - Prob. 19TFCh. 12 - Prob. 20TFCh. 12 - The following statement is in a class that uses...Ch. 12 - Prob. 2FTECh. 12 - Prob. 3FTECh. 12 - Prob. 4FTECh. 12 - Prob. 5FTECh. 12 - Prob. 1AWCh. 12 - Prob. 2AWCh. 12 - The variable myWindow references a JFrame object....Ch. 12 - Prob. 4AWCh. 12 - Prob. 5AWCh. 12 - Prob. 6AWCh. 12 - Prob. 7AWCh. 12 - Prob. 8AWCh. 12 - Prob. 9AWCh. 12 - Prob. 1SACh. 12 - Prob. 2SACh. 12 - Prob. 3SACh. 12 - Prob. 4SACh. 12 - Retail Price Calculator Create a GUI application...Ch. 12 - Prob. 2PCCh. 12 - Prob. 3PCCh. 12 - Travel Expenses Create a GUI application that...Ch. 12 - Prob. 5PCCh. 12 - Joes Automotive Joes Automotive performs the...Ch. 12 - Prob. 8PC
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