Which statement about Java's Throwable subclasses is correct? Select one: O All Exceptions must be caught (using try/catch) in your code. O All Exceptions are checked and all Errors are unchecked. O Both RuntimeExceptions and Errors are unchecked. O None of these options

Which statement about Java's Throwable subclasses is correct? Select one: O All Exceptions must be caught (using try/catch) in your code. O All Exceptions are checked and all Errors are unchecked. O Both RuntimeExceptions and Errors are unchecked. O None of these options

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;…
QUESTION 5 A class may simultaneously "implement" a class and "extend" an interface. True False QUESTION 6 Checked exceptions are exceptions that result from hardware or logic errors that typically cannot be anticipated or handled appropriately . True False
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this is a java program code please do the code what in the question says and please follow what in the question says and dont copy or plagarise from other sources
Time Converter 1. Write a program that converts dates from a numerical month-day format to alphabetic month-day format. IE 1/31 or 01/31 would have an output of January 31. 1. User enters the month and day as a single string. It is then converted. (10%) 2. Create 2 exception classes (20%) 1. MonthException thrown for invalid months 2. DayException-thrown for invalid days for the given month 3. You can assume Feb is always 28 days 2. This should run in a for loop and end when a user is done entering dates (70%)
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?