Introduction to Java Programming and Data Structures, Comprehensive Version (11th Edition)
11th Edition
ISBN: 9780134670942
Author: Y. Daniel Liang
Publisher: PEARSON
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Textbook Question
Chapter 9.9, Problem 9.9.3CP
In the following code, radius is private in the Circ1e class, and myCirc1e is an object of the Circ1e class. Does the highlighted code cause any problems? If so, explain why.
public class Circle {
private double radius= 1 ;
/ ** Find the area of this circle */
public double getArea () {
return radius * radius * Math.PI;
}
public static void main(String[] args) {
Circle myCircle = new Circle();
System.out.println("Radius is" + myCircle.radius);
}
}
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How do I change the code so if numMinutes is zero then the number cast members is also zero?
Code:
import java.util.*;
import java.util.Arrays;
public class Movie
{
private String movieName;
private int numMinutes;
private boolean isKidFriendly;
private int numCastMembers;
private String[] castMembers;
// default constructor
public Movie()
{
this.movieName = "Flick";
this.numMinutes = 0;
this.isKidFriendly = false;
this.numCastMembers = 0;
this.castMembers = new String[10];
}
// overloaded parameterized constructor
public Movie(String movieName, int numMinutes, boolean isKidFriendly, String[] castMembers)
{
this.movieName = movieName;
this.numMinutes = numMinutes;
this.isKidFriendly = isKidFriendly;
this.numCastMembers = castMembers.length;
this.castMembers = new String[numCastMembers];
for (int i = 0; i < castMembers.length; i++)
{
this.castMembers[i] = castMembers[i];
}
}
// set the number of minutes
public void setNumMinutes(int numMinutes)
{
this.numMinutes = numMinutes;
}
//…
// Makes String comparisons
public class DebugSeven1
{
publicstaticvoidmain(String[] args)
{
String name1 ="Roger";
String name2 ="Roger";
String name3 ="Stacy";
if(name1.equals(name2))
System.out.println(name1 + " and " + name2 +
" are the same");
if(name1.equals(name3))
System.out.println(name1 + " and " + name2 +
" are the same");
if(name1.equals("roger));
System.out.println(name1 + " and 'roger' are the same");
if(name1.equals("Roger"));
System.out.println(name1 + " and 'Roger' are the same");
}
}
This class contains a number of syntax and semantic errors.Your job is to find them all.
public Class DebugMe{
public static void main(String args[]){
printSums(args); compareBoxes(); }
//This function is designed to print the sums of all numbers between 1 and the //first number entered as an argument to DebugMe //For example, if you enter: DebugMe 3 //You should get: // The sum of the first 1 numbers is 1. // The sum of the first 2 numbers is 3. // The sum of the first 3 numbers is 6.
public static void printSums(String[] args){ {
int count;
count = Integer.parseInt(args);
for (i = 1 ; i <= count ; i++); { int sum = 0; int i = 0; sum += i - 1; System.out.println("The sum of the first " + i + " numbers is " + sum + "."); } }
//This function demonstrates the use of the Box class //DO NOT change anything in this function //use it to…
Chapter 9 Solutions
Introduction to Java Programming and Data Structures, Comprehensive Version (11th Edition)
Ch. 9.3 - Prob. 9.3.1CPCh. 9.3 - How do you define a class?Ch. 9.3 - How do you declare an objects reference variable?Ch. 9.3 - How do you create an object?Ch. 9.4 - Prob. 9.4.5CPCh. 9.4 - When will a class have a default constructor?Ch. 9.5 - Which operator is used to access a data field or...Ch. 9.5 - What is an anonymous object?Ch. 9.5 - Prob. 9.5.3CPCh. 9.5 - Is an array an object or a primitive-type value?...
Ch. 9.5 - Prob. 9.5.5CPCh. 9.5 - What is wrong in the following code? 1. class Test...Ch. 9.5 - Prob. 9.5.7CPCh. 9.6 - Prob. 9.6.1CPCh. 9.6 - Prob. 9.6.2CPCh. 9.6 - Which packages contain the classes Date, Random,...Ch. 9.7 - Suppose the class F is defined in (a). Let f be an...Ch. 9.7 - Prob. 9.7.2CPCh. 9.7 - Can you invoke an instance method or reference an...Ch. 9.9 - Prob. 9.9.1CPCh. 9.9 - Prob. 9.9.2CPCh. 9.9 - In the following code, radius is private in the...Ch. 9.10 - Prob. 9.10.1CPCh. 9.10 - Show the output of the following program: public...Ch. 9.10 - Show the output of the following code:Ch. 9.10 - Prob. 9.10.4CPCh. 9.11 - What is wrong in the following code? 1public class...Ch. 9.12 - If a class contains only private data fields and...Ch. 9.12 - If all the data fields in a class are private and...Ch. 9.12 - Is the following class immutable? public class A {...Ch. 9.13 - What is the output of the following program?...Ch. 9.14 - Prob. 9.14.2CPCh. 9.14 - Prob. 9.14.3CPCh. 9 - (The Rectangle class) Following the example of the...Ch. 9 - (The Stock class) Following the example of the...Ch. 9 - (Use the Date class) Write a program that creates...Ch. 9 - Prob. 9.4PECh. 9 - (Use the GregorianCa1endar class) Java API has the...Ch. 9 - (Stopwatch) Design a class named StopWatch. The...Ch. 9 - (The Account class) Design a class named Account...Ch. 9 - (The Fan class) Design a class named Fan to...Ch. 9 - (Geometry: n-sided regular polygon) In an n-sided...Ch. 9 - Prob. 9.10PECh. 9 - (Algebra: 2 2linear equations) Design a class...Ch. 9 - (Geometry: intersecting point) Suppose two line...Ch. 9 - (The Location class) Design a class named Location...
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