Do not use regular expressions in your solution for this exercise. Write a program that checks to see if an input password is valid or not. In this exercise, a valid password has the following characteristics: It contains at least eight characters. It contains at most 12 characters. It contains only alphabetic characters, digits and the underscore (‘_’) character. It does not start with a digit. It has a mix of upper-case and lower-case characters. Your class must contain the following method: public static String checkPassword(String input) This method receives a possible password as input and returns only the String"OK" if the password is valid. If the password is not valid then you can return the reason(s) for that as the return value. This is not a part of the requirements, however, and you don’t need to do that. You can simply return null for an invalid password.

Please submit a flowchart of your program for your project below. Need a class which will contain: Student Name Student Id Student Grades (an array of 3 grades) A constructor that clears the student data (use -1 for unset grades) Get functions for items a, b, and c, average, and letter grade Set functions for items a, n, and c Note that the get and set functions for Student grades need an argument for the grade index. Need another class which will contain: An Array of Students (1 above) A count of number of students in use You need to create a menu interface that allows you to: Add new students Enter test grades Display all the students with their names, ids, test grades, average, and letter grade Exit the program Add comments and use proper indentation. Nice Features: I would like that system to accept a student with no grades, then later add one or more grades, and when all grades are entered, calculate the final average or grade. I would like the system to display the...

In this assignment you will demonstrate your knowledge of debugging by fixing the errors you find in the program below. Fix the code, and paste it in this document, along with the list of the problems you fixed.This example allows the user to display the string for the day of the week. For example, if the user passed the integer 1, the method will return the string Sunday. If the user passed the integer 2, the method will return Monday. This code has both syntax errors and logic errors. Hint: There are two logic errors to find and fix (in addition to the syntax errors).Inport daysAndDates.DaysOfWeek;public class TestDaysOfWeek {public static void main(String[] args) {System.out.println("Days Of week: ");for (int i = 0;i < 8;i++) {System.out.println("Number: " + i + "\tDay Of Week: " + DaysOfWeek.DayOfWeekStr(i) )}}}package daysAndDatespublic class DaysOfWeek {public static String DayOfWeekStr(int NumberOfDay) {String dayStr = ""switch (NumberOfDay) {case 1:dayStr =...

Assignment 5B: Keeping Score. Now that we know about arrays, we can keep track of when events occur during our program. To prove this, let's create a game of Rock-Paper-Scissors. For those not familiar with this game, the basic premise is that each player says "Rock-Paper- Scissors!" and then makes their hand into the shape of one of the three objects. Winners are determined based on the following rules: Rock beats Scissors Scissors beats Paper Paper beats Rock At the start of the program, it will ask the player how many rounds of Rock-Paper- Scissors they want to play. After this, the game will loop for that many number of times. Each loop, it will ask the player what item they want to use – Rock, Paper, or Scissors. The computer will randomly generate its own item, and a winner will be determined. The game will then save the result as an element of an array, and the next round will begin. Once all the rounds have been played, the program will say "Game Over" and display a list of who...

Instructor note: This lab is part of the assignment for this chapter. This lab uses two Java files, LabProgram.java and SimpleCar.java. The SimpleCar class has been developed and provided to you already. You don't need to change anything in that class. Your job is to use the SimpleCar class to complete the specified tasks in the main() method of LabProgram.java Given two integers that represent the miles to drive forward and the miles to drive in reverse as user inputs, create a SimpleCar object that performs the following operations: Drives input number of miles forward Drives input number of miles in reverse Honks the horn Reports car status The SimpleCar class is found in the file SimpleCar.java. Ex: If the input is: 100 4 the output is: beep beep Car has driven: 96 miles

Java - Musical Note Frequencies

Write in Java please

Assign Barbecue's data member numberOfCalories with a value read from input. Then, assign Ham and Cheese's data member numberOfCalories with another value read from input. Input will contain two integer numbers. Only the *your code goes here can be affected, the rest of the program cannot be changed. Program below: ----------------------------#include <iostream>#include <vector>#include <string>using namespace std; struct PizzaInfo {string pizzaName;int numberOfCalories;}; int main() {vector<PizzaInfo> availablePizzas(2); availablePizzas.at(0).pizzaName = "Barbecue";availablePizzas.at(1).pizzaName = "Ham and Cheese"; /* Your code goes here */ cout << "A " << availablePizzas.at(0).pizzaName << " slice contains " << availablePizzas.at(0).numberOfCalories << " calories." << endl;cout << "A " << availablePizzas.at(1).pizzaName << " slice contains " << availablePizzas.at(1).numberOfCalories << "...

TRUE-FALSE: Type YES if the given statement is correct. Otherwise, type NO. Analyzing information nowadays is easier than in the past.

Х3: inlTol0 Write a function in Java that implements the following logic: Given a number n, return true if n is in the range 1..10, inclusive. Unless "outsideMode" is true, in which case return true if the number is less or equal to 1, or greater or equal to 10. Your Answer: 1 public boolean in1To10(int n, boolean outsideMode) 2 { 3 } H N M

Understanding ifStatements Summary In this lab, you complete a prewritten Java program for a carpenter who creates personalized house signs. The program is supposed to compute the price of any sign a customer orders, based on the following facts: The charge for all signs is a minimum of 35ドル.00. The first five letters or numbers are included in the minimum charge; there is a 4ドル charge for each additional character. If the sign is made of oak, add 20ドル.00. No charge is added for pine. Black or white characters are included in the minimum charge; there is an additional 15ドル charge for gold-leaf lettering. Instructions 1. Ensure the file named HouseSign.java is open. 2. You need to declare variables for the following, and initialize them where specified: A variable for the cost of the sign initialized to 0.00 (charge). A variable for the number of characters initialized to 8 (numChars). A variable for the color of the characters initialized to "gold" (color). A variable for the...

Part 2 - OddOrEven ClassWrite a program that prompts the user to enter an integer. The program should display "The input is odd" to the screen if the input is odd and displays "The input is even" to the screen if the input is even. Hint: Consider using the mod (%) operator

Program4 - (from ch7) - Computer-Assisted Instruction (Project Name: AITeacher) - The use of computers in education is referred to as computer-assisted instruction (CAI). Write a program that will help an elementary-school student learn multiplication. Use a Random object to produce two positive one-digit integers. The program should then prompt the user with a question, such as: How much is 6 times 7? The student then inputs the answer. Next, the program checks the student’s answer. If it is correct, display the message "Very good!" and ask another multiplication question. If the answer is wrong, display the message "No. Please try again." and let the student try the same question repeatedly until the student gets it right. A separate method should be used to generate each new question. This method should be called once when the app begins execution and each time the user answers the question correctly.