Answered: Calling objectA.equals(null) will cause…

Calling objectA.equals(null) will cause an exception to be thrown (assuming the equals method is appropriately overridden in the objectA class) O True False

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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-Modify your parameter constructors to call your set methods. This will cause validation of the parameter.-Create an exception class named TractorException.-Modify your setters to throw TractorException if invalid values are passed in. You may also need to add a throws clause to your parameter constructors. This way we will not have any print methods in our Tractor object defining class-Modify your main method to try and catch exceptions. It should catch TractorExceptions and general Exceptions and display an appropriate message import java.util.*; class TestException { public static void main(String s[]) { Scanner scanner = new Scanner(System.in); boolean valid=false; // validation loop while (!valid) { try { System.out.println("Enter integer:"); int number = scanner.nextInt(); // may throw an exception System.out.println("You entered "+ number); valid=true;…
What is a throw point? 2. What is an exception handler? 3. Explain the difference between a try block and a catch block. 4. What happens if an exception is thrown, but not caught? 5. Complete the following function that searches a numeric array for a specified value. The function should return the subscript of the element containing the value if it is found in the array. If the value is not found, the function should throw an exception. int searchArray(int array[], int size, int value){ int index = 0; // Used as an index to search array int subscript = -1; // To record position of search value while (index < size && subscript == -1) { if (array[index] == value) // If the value is found ___________________________________________________ ___________________________________________________ } if (subscript == -1) ___________________________________________________ return subscript; } Bonus…
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1. Create an exception class called SocSecException. The UML diagram for this class is below. SocSecException + SocSecException(error: String) : The constructor will call the superclass constructor. It will set the message associated with the exception to "Invalid social security number" concatenated with the error string. 2. Create a driver program called SocSecProcessor. This program will have a main method and a static method called isValid that will check if the social security number is valid. SocSecProcessor + main(args : String[]): void + is Valid(ssn: String): boolean Copyright © 2019 Pearson Education, Inc., Hoboken NJ Task #2 Writing Code to Handle an Exception 1. In the main method: a. The main method should read a name and social security number from the user as String objects. b. The main method should contain a try-catch statement. This statement tries to check if the social security number is valid by using the method isValid. If the social security number is valid, it…
What outcomes are possible in the event that an exception is thrown outside of a try block?
in C++ Define a new exception class named “VarNameException” that must inheritfrom the C++ runtime_error class. This class will capture the error case for avariable name when it does not start with a letter (lower case or upper case) or contains at least one blank. For example, if the user tries to create with a variable name of "1name", "?name" or "my name", it will generate an exception and this class should capture the reasonand the error value.
Note : Attempted in visual studio. Run the following code in Visual Studio and see if it generates an exception or not? If it generates an exception, then why is it doing so. Write the differences between static and dynamic objects as well. #include <iostream> using namespace std; class CRectangle { int width, height; public: void set_values (int, int); int area () {return (width * height);} }; void CRectangle::set_values (int a, int b) { width = a; height = b; } int main () { CRectangle a;// static object CRectangle* b=new CRectangle;//dynamic object a.set_values (1,2); b->set_values (3,4); cout << "*b area: " << b->area() << endl;//12 cout << "*b area: " << b->area() << endl;//12 delete b; cout << "*b area: " << b->area() << endl;//12 return 0; }