1. Write an application that throws and catches an ArithmeticException when you attempt to take thesquare root of a negative value. Prompt the user for an input value and try the Math.sqrt() method onit. The application either displays the square root or catches the thrown Exception and displays anappropriate message.

the java code is an given below :

Answered: Write an application that throws and…

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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This is the question - Write an application that displays a series of at least eight student ID numbers (that you have stored in an array) and asks the user to enter a test letter grade for the student. Create an Exception class named GradeException that contains a static public array of valid grade letters (A, B, C, D, F, and I) that you can use to determine whether a grade entered from the application is valid. In your application, throw a GradeException if the user does not enter a valid letter grade. Catch the GradeException, and then display the message Invalid grade. In addition, store an I (for Incomplete) for any student for whom an exception is caught. At the end of the application, display all the student IDs and grades. Code I was given, I will attach a screenshot of the errors- public class GradeException extends Exception { public GradeException(String string) { } } import java.util.*; public class TestGrade { public static void main(String args[]) throws…
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…
Use an IDE for this assignment and create a package called ER – put the three files in the package. In this assignment, you will create an application that will simulate the patients in an emergency room and how long they wait before they are seen. Every patient is assigned a priority from 1 to 10 (1 is the most important and 10 is the least important). The patients will be read in from the file PatientData.txt which has each record (line) as icetlame, lastNamE, patientlR, year, month, day, priority Create classes as follows Patient with 4 attributes - firstName, lastName, patientID (7 digits, cannot begin with 0), DOB. Add constructors and other methods. ERCase with 3 attributes – Patient, priority, timeWaitiog, Add constructors and other methods. This class must implement the interface Comparable and implement the method public int compareTe(ERCase c) EmergencyRoom- uses a Priority Queue to manage the patients in the ER waiting room. Add 5 cases to the Priority Queue at the start of…

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