Introduction to Java Programming and Data Structures, Comprehensive Version (11th Edition)
11th Edition
ISBN: 9780134670942
Author: Y. Daniel Liang
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Videos
Textbook Question
Chapter 13.6, Problem 13.6.5CP
What is wrong in the following code?
public class Test {
public static void main(String[] args) {
Person[] persons = {new Person(3), new Person(4), new Person(1)};
java.util.Arrays.sort(persons);
}
}
class Person {
private int id;
Person(int id) {
this.id = id;
}
}
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
class TenNums {private: int *p; public: TenNums() { p = new int[10]; for (int i = 0; i < 10; i++) p[i] = i; } void display() { for (int i = 0; i < 10; i++) cout << p[i] << " "; }};int main() { TenNums a; a.display(); TenNums b = a; b.display(); return 0;}
Write a copy constructor for the above class TenNums. Make sure it performs deep copy.
Group of answer choices
TenNums(const TenNums& b) { p = b.p;}
TenNums(const TenNums& b) { p = new int[10]; for (int i = 0; i < 10; i++) p[i] = b.p[i];}
TenNums(const TenNums b) { p = new int[10]; for (int i = 0; i < 10; i++) p[i] = b.p[i];}
TenNums(const TenNums b) { p = b.p;}
public class Test {
}
public static void main(String[] args) {
String str = "Salom";
System.out.println(str.indexOf('t));
}
Question 37
public static void main(String[] args) {
Dog[] dogs = { new Dog(), new Dog()};
for(int i = 0; i >>"+decision()); }
class Counter
{ private static int count;
public static void inc() { count++;}
public static int getCount() {return count;}
}
class Dog extends Counter{
public Dog(){}
public void wo(){inc();}
}
class Cat extends Counter{
public Cat(){}
public void me(){inc();}
}
The Correct answer:
Nothing is output
O 2 woofs and 5 mews
O 2 woofs and 3 mews
O 5 woofs and 5 mews
O
Chapter 13 Solutions
Introduction to Java Programming and Data Structures, Comprehensive Version (11th Edition)
Ch. 13.2 - Prob. 13.2.1CPCh. 13.2 - The getArea() and getPerimeter() methods may be...Ch. 13.2 - True or false? a.An abstract class can be used...Ch. 13.3 - Prob. 13.3.1CPCh. 13.3 - Prob. 13.3.2CPCh. 13.3 - Prob. 13.3.3CPCh. 13.3 - What is wrong in the following code? (Note the...Ch. 13.3 - What is wrong in the following code? public class...Ch. 13.4 - Can you create a Calendar object using the...Ch. 13.4 - Prob. 13.4.2CP
Ch. 13.4 - How do you create a Calendar object for the...Ch. 13.4 - For a Calendar object c, how do you get its year,...Ch. 13.5 - Prob. 13.5.1CPCh. 13.5 - Prob. 13.5.2CPCh. 13.5 - Prob. 13.5.3CPCh. 13.5 - Prob. 13.5.4CPCh. 13.6 - Prob. 13.6.1CPCh. 13.6 - Prob. 13.6.2CPCh. 13.6 - Can the following code be compiled? Why? Integer...Ch. 13.6 - Prob. 13.6.4CPCh. 13.6 - What is wrong in the following code? public class...Ch. 13.6 - Prob. 13.6.6CPCh. 13.6 - Listing 13.5 has an error. If you add list.add...Ch. 13.7 - Can a class invoke the super.clone() when...Ch. 13.7 - Prob. 13.7.2CPCh. 13.7 - Show the output of the following code:...Ch. 13.7 - Prob. 13.7.4CPCh. 13.7 - What is wrong in the following code? public class...Ch. 13.7 - Show the output of the following code: public...Ch. 13.8 - Prob. 13.8.1CPCh. 13.8 - Prob. 13.8.2CPCh. 13.8 - Prob. 13.8.3CPCh. 13.9 - Show the output of the following code: Rational r1...Ch. 13.9 - Prob. 13.9.2CPCh. 13.9 - Prob. 13.9.3CPCh. 13.9 - Simplify the code in lines 8285 in Listing 13.13...Ch. 13.9 - Prob. 13.9.5CPCh. 13.9 - The preceding question shows a bug in the toString...Ch. 13.10 - Describe class-design guidelines.Ch. 13 - (Triangle class) Design a new Triangle class that...Ch. 13 - (Shuffle ArrayList) Write the following method...Ch. 13 - (Sort ArrayList) Write the following method that...Ch. 13 - (Display calendars) Rewrite the PrintCalendar...Ch. 13 - (Enable GeometricObject comparable) Modify the...Ch. 13 - Prob. 13.6PECh. 13 - (The Colorable interface) Design an interface...Ch. 13 - (Revise the MyStack class) Rewrite the MyStack...Ch. 13 - Prob. 13.9PECh. 13 - Prob. 13.10PECh. 13 - (The Octagon class) Write a class named Octagon...Ch. 13 - Prob. 13.12PECh. 13 - Prob. 13.13PECh. 13 - (Demonstrate the benefits of encapsulation)...Ch. 13 - Prob. 13.15PECh. 13 - (Math: The Complex class) A complex number is a...Ch. 13 - (Use the Rational class) Write a program that...Ch. 13 - (Convert decimals to fractious) Write a program...Ch. 13 - (Algebra: solve quadratic equations) Rewrite...Ch. 13 - (Algebra: vertex form equations) The equation of a...
Additional Engineering Textbook Solutions
Find more solutions based on key concepts
Test Scores #1 Write a program that dynamically allocates an array large enough to hold a user-defined number o...
Starting Out with C++: Early Objects (9th Edition)
In Exercises 17 through 28, write a line (or lines) of code to carry out the task.
Give the focus to btnComput...
Introduction To Programming Using Visual Basic (11th Edition)
In the following exercises, write a program to carry out the task. The program should use variables for each of...
Introduction to Programming Using Visual Basic (10th Edition)
When displaying a Java applet, the browser invokes the _____ to interpret the bytecode into the appropriate mac...
Web Development and Design Foundations with HTML5 (9th Edition) (What's New in Computer Science)
The file pie=full. hcl contains a copy of the PIPE HCL description, along with a declaration of the constant va...
Computer Systems: A Programmer's Perspective (3rd Edition)
A classs responsibilities are __________. a. the objects created from the class b. things the class knows c. ac...
Starting Out with Java: From Control Structures through Objects (7th Edition) (What's New in Computer Science)
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, computer-science and related others by exploring similar questions and additional content below.Similar questions
- public class LabProgram { public static void main(String args[]) { Course cis162 = new Course(); int beforeCount; String toDrop; // Example students for testing cis162.addStudent(new Student("Henry", "Nguyen", 3.5)); cis162.addStudent(new Student("Brenda", "Stern", 2.0)); cis162.addStudent(new Student("Lynda", "Robison", 3.2)); cis162.addStudent(new Student("Sonya", "King", 3.9)); toDrop = "Stern"; beforeCount = cis162.countStudents(); cis162.dropStudent(toDrop); System.out.println("Course size: " + beforeCount + " students"); System.out.println("Course size after drop: " + cis162.countStudents() + " students"); } } import java.text.DecimalFormat; // Class representing a student public class Student { private String first; // first name private String last; // last name private double gpa; // grade point average // Student class constructor public Student(String f, String l, double g) {…arrow_forwardclass overload { int x; double y; void add(int a , int b) { x = a + b; } void add(double c , double d) { y = c + d; } overload() { this.x 0; %3D this.y = 0; } %3D } class Overload_methods { public static void main(String args[]) { overload obj int a = 2; double b - 3.2; obj.add(a, a); obj.add(b, b); System.out.println(obj.x + } = new overload(); + obj.y); } #3Run the codearrow_forwardthe code: class HighArray { private long[] a; private int nElems; public HighArray(int max) { a = new long[max]; nElems = 0; } public void insert(long value) { a[nElems] = value; nElems++; } public boolean find(long searchKey) { int j; for (j = 0; j < nElems; j++) if (a[j] == searchKey) break; if (j == nElems) return false; else return true; } public long getMax() { if (nElems == 0) return 01; else { long max = a[0]; for (int i = 1; i < nElems; i++) { if (a[i] > max) max = a[i]; } return max; } } public boolean delete(long value) { int j; for (j = 0; j < nElems; j++) if (value == a[j]) break; if (j == nElems) return false; else { for (int k = j; k < nElems; k++) a[k] = a[k + 1]; nElems--; return true; } } public void display() { for (int j = 0; j < nElems; j++) System.out.print(a[j] + " "); System.out.println(""); }} public class HighArrayApp { public static void main(String[] args) { int maxSize =…arrow_forward
- class class { public static void main(String args[]) { int a =5; int b =10; first: { second: { third: { if(a == b >>1) break second; } System.out.println(a); } System.out.println(b); } } } Give result for the code Java Try to do ASAParrow_forwardpublic class test{ private static final int MAX = 100; private int[] sco; public test(int[] sco){ this.sco = sco; } private int comAvg() throws IllegalArgumentException{ int sum = 0; for (int i = 0; i < sco.length; i++){ int sc = sco[i]; if (sc < 0 || sc > MAX){ throw new IllegalArgumentException("Score (" + sc + ") is not in the range 0-" + MAX); } sum += sco[i]; } int av = sum / sco.length; return av; } public static void main(String[] args){ test test = new test(new int[] { 50, 70, 81 }); try{ int avgSc = test.comAvg(); char letG; if (avgSc < 60) letG = 'F'; else if (avgSc < 70) letG = 'D'; else if (avgSc < 80) letG = 'C'; else if (avgSc < 90) letG = 'B'; else letG = 'A'; System.out.println("\nAVG Score is " +…arrow_forwardpublic class Polygon { private double sideLength; private int sides; private String shape; public double getArea () { int n sides; double a sideLength; return ((a * a * n) / (4 * Math.tan((180 / n) 3.14159 / 180))); public void setPolygon (double sl, int sd, String sh) { sides-sd; sideLength-sl; shape=sh; public Polygon (double sl, int sd, String sh) ( sides-sd; sideLengthsl; shape=sh; public String getShape () { return (shape); } public int getSides () { return (sides); } public double getLength () { return (sideLength); } Write a static method named find that takes as a parameter an array of type Polygon named list. The method should print the shapes of each polygon that has an area greater than 500 and return their count. The method prototype is public static int find (Polygon [] list); Note: assume the array is already declared, populated with data in the main method and ready to be used.arrow_forward
- class Param3 { public int x; private void increase(int p) { x = x*p; } public void calculateX(int y) { increase(y); } public int getX() { return x; } } // in another class Param3 q3 = new Param3(); q3.x = 5; q3.calculateX(7); System.out.println(q3.getX()); what would be the answer for the last two lines ? also above were x = x*p do both x in here are the fields? wouldn't that be cnofusing?arrow_forwardpublic static void main(String[] args) { int a; int b; int c; c = quad(0,1, 2); b = quad(1, 2, 3); a = quad(5, 6, 7); c = c +b+ a; } private static int quad(int a, int b, int c) { int r; r= a +b+ c; return r; } For the code above, how many entries does the activation record for method quad have? During the execution of main, at most how many activation records are existent on the run-time stack?arrow_forwardusing System; class Program { publicstaticvoid Main(string[] args) { int number = 1,i; while (number <= 88) { Console.WriteLine(number); number = number + 2; { Random r = new Random(); int[] randNo=newint[3]; for(i=0;i<3;i++) { randNo[i]= r.Next(1,88) Console.WriteLine("Random Number between 1 and 88 is "+randNo); } } } } } how can this program be fixed to choose three random numbers in C# between 1-88 instead of just one random number?arrow_forward
- Analyze the following code. 1. public class Test { 2. public static void main(String[] args) { 3. Fruit[] fruits = {new Fruit(2), new Fruit(3), new Fruit(1)}; 4. java.util.Arrays.sort(fruits); 5. } 6.} class Fruit { private double weight; public Fruit(double weight) { this.weight = weight; } } The program has a compile error because the Fruit class does not have a no-arg constructor. The program has a runtime error on Line 3 because the Fruit class does not have a no-arg constructor. The program has a compile error on Line 4 because the Fruit class does not implement the java.lang.Comparable interface and the Fruit objects are not comparable. The program has a runtime error on Line 4 because the Fruit class does not implement the java.lang.Comparable interface and the Fruit objects are not comparable.arrow_forward1- public class Con{ public static void main(String[] args) int[] ar=(2,5,7,9}; int i=2; final int j=1; 6. for (int x:ar) 8- { 9 if(ar[i]arrow_forwardimport java.util.Scanner; public class LabProgram { public static void main(String[] args) { Scanner scnr = new Scanner(System.in); String[] names = { "Ryley", "Edan", "Reagan", "Henry", "Caius", "Jane", "Guto", "Sonya", "Tyrese", "Johnny" }; int index; index = scnr.nextInt(); /* Type your code here. */ }}arrow_forwardarrow_back_iosSEE MORE QUESTIONSarrow_forward_ios
Recommended textbooks for you
Database System ConceptsComputer ScienceISBN:9780078022159Author:Abraham Silberschatz Professor, Henry F. Korth, S. SudarshanPublisher:McGraw-Hill Education
Starting Out with Python (4th Edition)Computer ScienceISBN:9780134444321Author:Tony GaddisPublisher:PEARSON
Digital Fundamentals (11th Edition)Computer ScienceISBN:9780132737968Author:Thomas L. FloydPublisher:PEARSON
C How to Program (8th Edition)Computer ScienceISBN:9780133976892Author:Paul J. Deitel, Harvey DeitelPublisher:PEARSON
Database Systems: Design, Implementation, & Manag...Computer ScienceISBN:9781337627900Author:Carlos Coronel, Steven MorrisPublisher:Cengage Learning
Programmable Logic ControllersComputer ScienceISBN:9780073373843Author:Frank D. PetruzellaPublisher:McGraw-Hill Education
Database System Concepts
Computer Science
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:McGraw-Hill Education
Starting Out with Python (4th Edition)
Computer Science
ISBN:9780134444321
Author:Tony Gaddis
Publisher:PEARSON
Digital Fundamentals (11th Edition)
Computer Science
ISBN:9780132737968
Author:Thomas L. Floyd
Publisher:PEARSON
C How to Program (8th Edition)
Computer Science
ISBN:9780133976892
Author:Paul J. Deitel, Harvey Deitel
Publisher:PEARSON
Database Systems: Design, Implementation, & Manag...
Computer Science
ISBN:9781337627900
Author:Carlos Coronel, Steven Morris
Publisher:Cengage Learning
Programmable Logic Controllers
Computer Science
ISBN:9780073373843
Author:Frank D. Petruzella
Publisher:McGraw-Hill Education
6 Stages of UI Design; Author: DesignerUp;https://www.youtube.com/watch?v=_6Tl2_eM0DE;License: Standard Youtube License