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 11.5, Problem 11.5.1CP
Identify the problems in the following code:
1 public class Circle {
2 private double radius;
3
4 public Circle (double radius) {
5 radius = radius;
6 }
7
8 public double getRadius() {
9 return radius;
10 }
11
12 public double getArea() {
13 return radius * radius * Math.PI;
14 }
15 }
16
17 class B extends Circle {
18 private double length;
19
20 B(double radius, double length) {
21 Circle(radius);
27 length = length;
23 }
24
25 @Override
26 public double getArea() {
27 return getArea() * length;
28 }
29 }
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Use the following partial class definitions to answer the questions a-c
public class A1
{
public int x;
private int y;
protected int z;
...
}
public class A2 extends A1
{
protected int a;
private int b;
...
}
public class A3 extends A2
{
private int q;
...
}
a) Which of the following is true with respect to A1, A2 and A3?
Group of answer choices
A1 is a subclass of A2 and A2 is a subclass of A3
A3 is a subclass of A2 and A2 is a subclass of A1
A1 and A2 are both subclasses of A3
A2 and A3 are both subclasses of A1
A1, A2 and A3 are all…
Q2:
Consider the following statements:
public class YClass
{
private int a;
private int b;
public void one()
{
}
public void two(int x, int y);
{
}
public YClass()
{
}
}
class XClass extends YClass
{
private int z;
public void one()
{
}
public XClass()
{
}
}
YClass yObject;
XClass xObject;
Write the definition of the default constructor of YClass so that the instance variables of YClass are initialized to 0.
Write the definition of the default constructor of XClass so that the instance variables of XClass are initialized to 0.
Write the definition of the method two of YClass so that the instance variable a is initialized to the value of the first parameter of two and the instance variable b is initialized to the value of the second parameter of two.
please I want solution :(
Write a program that does the following:
1-Define two classes Teacher and Department. Each Teacher has a department object as follow: [3 points]
class Department{
int dno;
char *name;
//add data member to count number of departments automatically
public:
//add required methods here
//define print function that prints all details of department. Note that print function is NOT function member of class Department
};
class Teacher{
const int SSN;
char *name;
Department d;
public:
//add all required methods
//define print function that prints all details of Teacher. Note that print function is NOT function member of class Teacher
}
2-inside main do the following:
a) create array of 5 Teachers. add all required details for each object inside a loop.(do NOT use cin>>)
b)use print function for department and use print function for student.
c)define and use a function FindTeachers that takes the array of Teachers and name of department. Then the function returns a list of all Teachers…
Chapter 11 Solutions
Introduction to Java Programming and Data Structures, Comprehensive Version (11th Edition)
Ch. 11.2 - True or false? A subclass is subset of a...Ch. 11.2 - What keyword do you use to define a subclass?Ch. 11.2 - What is single inheritance? What is multiple...Ch. 11.3 - What is the output of running the class C in (a)?...Ch. 11.3 - How does a subclass invoke its superclasss...Ch. 11.3 - True or false? When invoking a constructor from a...Ch. 11.4 - True or false? You can override a private method...Ch. 11.4 - True or false? You can override a static method...Ch. 11.4 - How do you explicitly invoke a superclasss...Ch. 11.4 - How do you invoke an overridden superclass method...
Ch. 11.5 - Identify the problems in the following code:...Ch. 11.5 - Prob. 11.5.2CPCh. 11.5 - If a method in a subclass has the same signature...Ch. 11.5 - If a method in a subclass has the same signature...Ch. 11.5 - If a method in a subclass has the same name as a...Ch. 11.5 - Prob. 11.5.6CPCh. 11.7 - Prob. 11.7.1CPCh. 11.8 - Prob. 11.8.1CPCh. 11.8 - Prob. 11.8.2CPCh. 11.8 - Can you assign new int[50], new Integer [50], new...Ch. 11.8 - Prob. 11.8.4CPCh. 11.8 - Show the output of the following code:Ch. 11.8 - Show the output of following program: 1public...Ch. 11.8 - Show the output of following program: public class...Ch. 11.9 - Indicate true or false for the following...Ch. 11.9 - For the GeometricObject and Circle classes in...Ch. 11.9 - Suppose Fruit, Apple, Orange, GoldenDelicious, and...Ch. 11.9 - What is wrong in the following code? 1public class...Ch. 11.10 - Prob. 11.10.1CPCh. 11.11 - Prob. 11.11.1CPCh. 11.11 - Prob. 11.11.2CPCh. 11.11 - Prob. 11.11.3CPCh. 11.11 - Prob. 11.11.4CPCh. 11.11 - Prob. 11.11.5CPCh. 11.12 - Correct errors in the following statements: int[]...Ch. 11.12 - Correct errors in the following statements: int[]...Ch. 11.13 - Prob. 11.13.1CPCh. 11.14 - What modifier should you use on a class so a class...Ch. 11.14 - Prob. 11.14.2CPCh. 11.14 - In the following code, the classes A and B are in...Ch. 11.14 - In the following code, the classes A and B are in...Ch. 11.15 - Prob. 11.15.1CPCh. 11.15 - Indicate true or false for the following...Ch. 11 - Sections 11.211.4 11.1(The Triangle class) Design...Ch. 11 - (Subclasses of Account) In Programming Exercise...Ch. 11 - (Maximum element in ArrayList) Write the following...Ch. 11 - Prob. 11.5PECh. 11 - (Use ArrayList) Write a program that creates an...Ch. 11 - (Shuffle ArrayList) Write the following method...Ch. 11 - (New Account class) An Account class was specified...Ch. 11 - (Largest rows and columns) Write a program that...Ch. 11 - Prob. 11.10PECh. 11 - (Sort ArrayList) Write the following method that...Ch. 11 - (Sum ArrayList) Write the following method that...Ch. 11 - (Remove duplicates) Write a method that removes...Ch. 11 - (Combine two lists) Write a method that returns...Ch. 11 - (Area of a convex polygon) A polygon is convex if...Ch. 11 - Prob. 11.16PECh. 11 - (Algebra: perfect square) Write a program that...Ch. 11 - (ArrayList of Character) Write a method that...Ch. 11 - (Bin packing using first fit) The bin packing...
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