FilelO 01: Write a Message Write a FileI001 class with a method named writeMessage() to takes message as a String and a filename (as a String) (in that order). Have the method, write the message to the filename. Your code will either need to 1) catch all checked exceptions or 2) use the throws keyword. public class File1081{ public void writeMessage( String message, String filename ){

FilelO 01: Write a Message Write a FileI001 class with a method named writeMessage() to takes message as a String and a filename (as a String) (in that order). Have the method, write the message to the filename. Your code will either need to 1) catch all checked exceptions or 2) use the throws keyword. public class File1081{ public void writeMessage( String message, String filename ){

EBK JAVA PROGRAMMING

9th Edition

ISBN:9781337671385

Author:FARRELL

Publisher:FARRELL

Chapter12: Exception Handling

Section: Chapter Questions

Problem 19RQ

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InputOutput Class: write a program that carries out the following tasks: o Create an object of type PrintWriter and that writes into a file with the name greeting.txt. o Print the message "Hello, world!" on the file. o Close the file. o Open the same file again. o Read the message into a string variable (hint: use nextLine() method to read the text). o Print the message on the screen. AddNumbers Class: write a program that asks the user to input four floating-point numbers. Add all correctly specified values and print the sum when the user is done entering data. Use exception handling to detect improper inputs. For example, the user might enter letters instead of numbers. In this case, use the exception handling mechanism to print a proper message. (hint: use InputMismatchException) Don't forget to import java.util.*.
1.class Nothing {public static void main(String args[]){int x = 0;int y = 20;int fraction = y/x;System.out.println("End Of Main");}}1. If there will occur exception, write the code that will handle the exception.
FilelO 05: Averages from a File Write a FileI005 class with a method named calculateAverage() that takes a filename (as a String). Assume that the file only contains numerical values. Have the method calculate the average of all of the values. Return the average as a Double. If an exception is thrown, display an informative message and return e.0. Example FileI005 driver String filename Double val = new FileI005 (); "numbers0.txt"; driver.calculateAverage ( filename ); // returns 58.3529411764706 filename = "numbers1.txt"; driver.calculateAverage( filename ); // returns 62.699999999999996 %3D val = "numbers2.txt"; driver.calculateAverage( filename ); // returns 56.828571428571436 filename val !!
1-Write a JAVA program that reads an array from input file and invokes twodifferent methods Sort and Max ,that sorts the elements of the array and findsthe Max element and writes out the resulted array in to output file . Usetwo interfaces for methods and throw Exception Handling for Out Of Boundindex for the array
Assume there is a static method called scienceTechEngrMath that takes a String parameter. Its prototype is below:public static String scienceTechEngrMath(String department) This method will return the answer to any department-based question, but… it will throw exceptions in the following cases: • NullPointerException is thrown if you pass it “null” instead of an actual department string • NotInTheDivisionException is thrown if the length of the characters in the department name is less than 7 • ThatIsInvalidDivisionException is thrown if the length of characters in the department name is more than 11 characters private static void askDepartment(String question) { try { String response = scienceTechEngrMath(question); System.out.println("1"); } catch (NullPointerException e) { System.out.println("3"); } catch (NotInTheDivisionException e) { System.out.println("5"); }…
C++ Add a search command that asks the user for a string and finds the first line that contains that string. The search starts at the first line currently displayed and stops at the end of the file. If the string is found, the line that contains it is displayed at the top. In case the user enters a string X that does not occur in the file, the program should print the error message: ERROR: string "X" was not found. Attached is the first lines of the .txt file
C++ Add a search command that asks the user for a string and finds the first line that contains that string. The search starts at the first line currently displayed and stops at the end of the file. If the string is found, the line that contains it is displayed at the top. In case the user enters a string X that does not occur in the file, the program should print the error message: ERROR: string "X" was not found.
Exception handling and File I/O coding intellj Exercise 3. File I/O Please create a file and add the following line: 1,5,7,9,13,58,70 Exercise 4, Assuming you have a file on your laptop, and it has the following: John,23 Please create a Person object from your main method by reading the file. You have to create Person class (String name, int age) Please read the file and show the sum of all the numbers.
Java Problem The teacher at a school needs help grading an exam with a number of True/False questions. The students’ IDs and test answers are stored in a file. The first entry of the file contains the answer to the test in the form: TTFTFTTTFTFTFFTTFTTF Every other entry in the file is the student’s ID, followed by a blank, followed by the students’ response. For instance, the entry: ABC54102 T FTFTFTTTFTTFTTF TF The student’s ID is ABC54102, answer to question 1 is True, the answer to question 3 is False. Also, the student did not answer question 2 and question 18. The exam has 20 questions. Here is the grading policy: each correct answer is awarded two points, each wrong answer get -1 point, and no answer gets 0 point. Write a program that processes the test data. The output should be the student’s ID, followed by the answers, followed by the test score (total points), followed by the test grade. Assume the following grade scale will be used: 90%-100%, A; 80%-89.99%, B; 70%-79.99%,…
. The TryParse methods throw an exception if the string argument cannot be converted
File Stream Problem: Implement a Caesar cipher that can encrypt and decrypt text and file. A Caesar cipher is a substitution cipher that shifts the letters in the original message x spaces ascending the alphabet where x is the key. Example if the key for the cipher is 3, and the message is “I will be there.” Then the coded message would be “L zloo eh wkhuh” Program requirements: Create a class call CCipher that has two member functions encrypt and decrypt. The program should be able to encrypt/decrypt a message from a file as well as a keyboard input. The default key should be 3. The user should be able to select between encrypting and decrypting and should be allowed to do so multiple times until s/he decides to end the program. The file format to be encrypted should be a “.txt” and the user should be able to provide the name of the file to be encrypted, after which the file should be deleted. The user should have the option to view…
The return Or the throw function sometimes returns a random number and throws anither number as an exception. Write a code that will print out the number that the returnorthrow function gives back even if it throws an exception.