Write an application that throws and catches an ArithmeticException when you attempt to take the square root of a negative value. Prompt the user for an input value and try the Math.sqrt() method on it. The application either displays the square root or catches the thrown Exception and displays an appropriate message. Save the file as SqrtException.java.

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.   import java.util.*; public class TestGrade {     public static void main(String args[]) throws Exception {         Scanner input = new Scanner(System.in);         int[] ids = {1234, 1245, 1267, 1278, 2345,                      1256, 3456, 3478, 4567, 5678                     };…

Challenge 2: InvalidNumbers.java Write a program InvalidNumbers that asks the user to enter a positive integer. The program will warn the user if a valid integer is not entered using the InputMismatchException and ask to enter again. The program should also throw an exception if the user enters negative numbers. Write the program and test it using negative numbers, doubles, and very large numbers.

Given an array of 10 names, complete the main method that outputs the name specified by the array index entered by the user. Use a try block to output the name and a catch block to catch any ArrayIndexOutOfBoundsException. Output the message from the exception object if an ArrayIndexOutOfBoundsException is caught. Output the first element in the array if the index is negative or the last element if the index is greater than the size of the array. Hint: Format the exception outputs using the getMessage() method from the exception object. Do not hard code the exception messages. Ex: If the input of the program is: 5 the program outputs: Name: Jane Ex: If the input of the program is: 12 the program outputs: Exception! Index 12 out of bounds for length 10 The closest name is: Johnny Ex: If the input of the program is: -2 the program outputs: Exception! Index -2 out of bounds for length 10 The closest name is: Ryley import java.util.Scanner; public class LabProgram {  public static void…

A pedometer treats walking 2,000 steps as walking 1 mile. Write a stepsToMiles() method that takes the number of steps as an integer parameter and returns the miles walked as a double. The stepsToMiles() method throws an Exception object with the message "Exception: Negative step count entered." when the number of steps is negative. Complete the main() method that reads the number of steps from a user, calls the stepsToMiles() method, and outputs the returned value from the stepsToMiles() method. Use a try-catch block to catch any Exception object thrown by the stepsToMiles() method and output the exception message. Output each floating-point value with two digits after the decimal point, which can be achieved as follows:System.out.printf("%.2f", yourValue); Ex: If the input of the program is: 5345 the output of the program is: 2.67 Ex: If the input of the program is: -3850 the output of the program is: Exception: Negative step count entered. import java.util.Scanner; public class…

A pedometer treats walking 2,000 steps as walking 1 mile. Write a stepsToMiles() method that takes the number of steps as an integer parameter and returns the miles walked as a double. The stepsToMiles() method throws an Exception object with the message "Exception: Negative step count entered." when the number of steps is negative. Complete the main() method that reads the number of steps from a user, calls the stepsToMiles() method, and outputs the returned value from the stepsToMiles() method. Use a try-catch block to catch any Exception object thrown by the stepsToMiles() method and output the exception message. Output each floating-point value with two digits after the decimal point, which can be achieved as follows: System.out.printf("%.2f", yourValue);

We are asked to add an exception to the game. Please see below. For this part of the assignment you can start by creating your own exception in a file named NumberGuesserIllegalStateException.java, with this code: public class NumberGuesserIllegalStateException extends Exception {  public NumberGuesserIllegalStateException(String errorMessage) {    super(errorMessage);  } } Next modify your code so that the higher and lower methods of both the NumberGuesser and RandomNumberGuesser should throw the exception if there are no more remaining numbers to guess. You might be able to achieve this by adding the logic to your NumberGuesser and letting RandomNumberGuesser inherit the behavior. Or you might need to add the logic to both classes. It will depend on your implementation. Finally add a try-catch block to your number guessing game so that the user is notified if the user cheats.

Rules:  Corner cases.  Throw the specified exception for the following corner cases: Throw an IllegalArgumentException if the client calls either addFirst() or addLast() with a null argument. Throw a java.util.NoSuchElementException if the client calls either removeFirst() or removeLast when the deque is empty. Throw a java.util.NoSuchElementException if the client calls the next() method in the iterator when there are no more items to return. Unit testing.  Your main() method must call directly every public constructor and method to help verify that they work as prescribed (e.g., by printing results to standard output). Performance requirements.  Your implementation must achieve the following worst-case performance requirements: A deque containing n items must use at most 48n + 192 bytes of memory, not including the memory for the items themselves. Each deque operation (including construction) must take constant time. Each iterator operation (including construction) must take…

java programming

Java Questions - (Has 2 Parts). Based on each code, which answer out of the choices "A, B, C, D, E" is correct. Each question has one correct answer. Thank you. Part 1 - Which of these keywords is used by the calling method to guard against the exception that is thrown by called method? A. tryB. throwC. throwsD. catchE. finally Part 2 - Which of the following is correct? A. All classes of Exception extend from Error.B. All classes of Error extend from Exception.C. All classes of Exception extend from Throwable.D. All classes of Throwable extend from Exception.E. All classes of Throwable extend from RuntimeException.