Starting Out with Java: Early Objects (6th Edition)
6th Edition
ISBN: 9780134462011
Author: Tony Gaddis
Publisher: PEARSON
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Textbook Question
Chapter 4.5, Problem 4.15CP
The following program is used in a bookstore to determine how many discount coupons a customer gets. Complete the table that appears after the program.
import javax.swing.JOptionPane;
public class Checkpoint
{
public static void main(String[] args)
{
int books, coupons;
String input;
input = JOptionPane.showInputDialog(“How many books ” +“are being purchased? ”);
books = Integer.parseInt(input);
if (books < 1)
coupons = 0;
else if (books < 3)
coupons = 1;
else if (books < 5)
coupons = 2;
else
coupons = 3;
JOptionPane.showMessageDialog(null, “The number of coupons to give is ” + coupons);
System.exit(0);
}
}
| If the customer purchases this many books … | this many coupons are given. |
| 1 | _____ |
| 2 | _____ |
| 3 | _____ |
| 4 | _____ |
| 5 | _____ |
| 10 | _____ |
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// DebugFive2.java
// Decides if two numbers are evenly divisible
import java.util.Scanner;
public class DebugFive2
{
publicstaticvoidmain(Stringargs[])
{
int num;
int num2;
Scanner input =newScanner(System.in);
System.out.print("Enter a number ");
num = input.nextInteger()
System.out.print("Enter another number ");
num2 = inputnextInt();
if((num % num2 ==0) && (num2 % num) ==0)
System.out.println("One of these numbers is evenly divisible into the other");
else
System.out.println("Neither of these numbers is evenly divisible into the other");
}
}
public void foo4() {
String s2 = "smith";
String s3 = s2;
String s4 = null;
String s5 = "";
String só = new String(s2);
if(s2 == s3) {
System.out.print("1");
}
if(s2.equals(s3)) {
System.out.print("2");
}
if(s2 == s6) {
System.out.print("3");
}
if(s2.equals(s6)) {
System.out.print("4");
}
if(s5 == s4) {
System.out.print("5");
}
if(s4.equals(s5)) {
System.out.print("6");
}
3//end of foo4()
Examine and trace the method foo4() above, which statement IS true?
O The method will print out "356" on screen.
The method will print out "1234" on screen.
The method will print out "123" on screen.
The method will print out "124" on screen.
public String getJoblitle() {
return joblitle;
11
12
13
44
45
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47
48
49
50
public void setJoblitle(String joblitle) {
this.jobTitle - joblitle;
public int getCurrentEmploynent() {
return currentEmploynent;
1.
public void selCurrentEnployent (int current Fmployment) {
this.currentEmploynent - currentEmployment;
53
54
55
56
-57
goverride
public String tostring () {
return "CurrentEmploynentStatsclass [areaName=" + arealame +
58
+ "year=" + year + ", jobtitle-" + joblitle
, currentEnploynent-" + currenttmployment + "]":
59
61
62
63
64 }
What algorithm does this method perform?
public statie Currentiploynentstatsclass mysteryethod (CurrentEmploynentstatsclass] array) (
int holder = array[0).getCurrenttmploynent();
Currenttmploynentstatsclass variable = array[®];
for(int i- 0, i holder) {
holder = holderx;
variable - array[1];
return variable;
36. What is the above method returning?
37. What is the Big O time of the above method?
Chapter 4 Solutions
Starting Out with Java: Early Objects (6th Edition)
Ch. 4.1 - Write an if statement that assigns 0 to x when y...Ch. 4.1 - Write an if statement that multiplies payRate by...Ch. 4.1 - Write an if statement that assigns 0.2 to...Ch. 4.1 - Write an if statement that sets the variable fees...Ch. 4.1 - Write an if statement that assigns 20 to the...Ch. 4.1 - Write an if statement that assigns 0 to the...Ch. 4.1 - Write an if statement that displays Goodbye if the...Ch. 4.2 - Write an if-else statement that assigns 20 to the...Ch. 4.2 - Write an if-else statement that assigns 1 to x...Ch. 4.2 - Write an if-else statement that assigns 0.10 to...
Ch. 4.2 - Write an if-else statement that assigns 0 to the...Ch. 4.4 - Write nested if statements that perform the...Ch. 4.4 - Write code that tests the variable x to determine...Ch. 4.5 - What will the following program display? public...Ch. 4.5 - The following program is used in a bookstore to...Ch. 4.6 - Prob. 4.16CPCh. 4.6 - Assume the variables a = 2, b = 4, and c = 6....Ch. 4.6 - Write an if statement that displays the message...Ch. 4.6 - Write an if statement that displays the message...Ch. 4.7 - Assume the variable name references a String...Ch. 4.7 - Prob. 4.21CPCh. 4.7 - Prob. 4.22CPCh. 4.9 - Rewrite the following if-else statements as...Ch. 4.10 - Complete the following program skeleton by writing...Ch. 4.10 - Rewrite the following if-else-if statement as a...Ch. 4.10 - Explain why you cannot convert the following...Ch. 4.10 - What is wrong with the following switch statement?...Ch. 4.10 - What will the following code display? int funny =...Ch. 4 - The if statement is an example of a __________. a....Ch. 4 - This type of expression has a value of either true...Ch. 4 - , , and = = are __________. a. relational...Ch. 4 - , | |, and ! are __________. a. relational...Ch. 4 - Prob. 5MCCh. 4 - To create a block of statements, you enclose the...Ch. 4 - This is a boolean variable that signals when some...Ch. 4 - How does the character A compare to the character...Ch. 4 - This is an if statement that appears inside...Ch. 4 - Prob. 10MCCh. 4 - When determining whether a number is inside a...Ch. 4 - Prob. 12MCCh. 4 - The conditional operator takes this many operands....Ch. 4 - This section of a switch statement is branched to...Ch. 4 - True or False: The = operator and the == operator...Ch. 4 - True or False: A conditionally executed statement...Ch. 4 - Prob. 17TFCh. 4 - True or False: When an if statement is nested in...Ch. 4 - True or False: When an if statement is nested in...Ch. 4 - True or False: The scope of a variable is limited...Ch. 4 - Find the errors in the following code: 1. //...Ch. 4 - Find the errors in the following code: 2. //...Ch. 4 - Find the errors in the following code: 3. //...Ch. 4 - Prob. 4FTECh. 4 - Find the errors in the following code: 5. The...Ch. 4 - Find the errors in the following code: 6. The...Ch. 4 - The following statement should determine whether...Ch. 4 - Find the errors in the following code: 8. The...Ch. 4 - Prob. 9FTECh. 4 - Write an if statement that assigns 100 to x when y...Ch. 4 - Write an if-else statement that assigns 0 to x...Ch. 4 - Using the following chart, write an if-else-if...Ch. 4 - Write an if statement that sets the variable hours...Ch. 4 - Write nested if statements that perform the...Ch. 4 - Write an if statement that prints the message The...Ch. 4 - Write an if statement that prints the message The...Ch. 4 - Write an if statement that prints the message The...Ch. 4 - Write an if-else statement that displays the...Ch. 4 - Convert the following if-else-if statement into a...Ch. 4 - Match the conditional expression with the if-else...Ch. 4 - Explain what is meant by the phrase conditionally...Ch. 4 - Explain why a misplaced semicolon can cause an if...Ch. 4 - Why is it good advice to indent all the statements...Ch. 4 - What happens when you compare two String objects...Ch. 4 - Prob. 5SACh. 4 - What risk does a programmer take when not placing...Ch. 4 - Prob. 7SACh. 4 - Prob. 8SACh. 4 - Why are the relational operators called...Ch. 4 - How do you use private methods in a class to...Ch. 4 - Roman Numerals Write a program that prompts the...Ch. 4 - Time Calculator Write a program that asks the user...Ch. 4 - TestScores Class Design a TestScores class that...Ch. 4 - Software Sales A software company sells a package...Ch. 4 - BankCharges Class A bank charges 10 per month,...Ch. 4 - ShippingCharges Class The Fast Freight Shipping...Ch. 4 - FatGram Class Design a class with a method that...Ch. 4 - Running the Race Write a program that asks for the...Ch. 4 - The Speed of Sound The following table shows the...Ch. 4 - Freezing and Boiling Points The following table...Ch. 4 - Mobile Service Provider A mobile phone service...Ch. 4 - Mobile Service Provider, Part 2 Modify the program...Ch. 4 - Body Mass Index Write a program that calculates...Ch. 4 - Days in a Month Write a class named MonthDays. The...Ch. 4 - Book Club Points Serendipity Booksellers has a...Ch. 4 - Magic Dates The date June 10, 1960, is special...Ch. 4 - Hot Dog Cookout Calculator Assume that hot dogs...Ch. 4 - Roulette Wheel Colors On a roulette wheel, the...Ch. 4 - Wi-Fi Diagnostic Tree Figure 3-23 shows a...Ch. 4 - Restaurant Selector You have a group of friends...
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