java programs Perfect Numbers Write a method isPerfect that determines whether parameter number is a perfect number. Use this method in an application todisplays all the perfect numbers between 1and1000. Display factors of each perfect number and confirm number is "perfect."
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java programs Perfect Numbers
Write a method isPerfect that determines whether parameter number is a perfect number. Use this method in an application todisplays all the perfect numbers between 1and1000. Display factors of each perfect number and confirm number is "perfect."
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- Java Program Prime Number List Use the isPrime method that you wrote in Programming Challenge 13 in a program that prompts the user to enter an integer number, then displays all prime numbers less than the user number separated by a space. Enter a number: \n10ENTER2 3 5 7 Test Case 2 Enter a number: \n100ENTER2 3 5 7 11 13 17 19 23 29 31 37 41 43 47 53 59 61 67 71 73 79 83 89 97C# Part 1: In your program, write a method that accepts a positive integer and returns true if the number is a prime number and false otherwise. Note that 2 is the only even prime number. An odd integer is prime if it not divisible by any odd integer less than or equal to the square root of the number. Part2: A prime number whose reversal is also a prime number is called emirp. For example, 11, 13, 79 and 359 are emirps. Write a program that outputs to a ListBox the first 100 emirps. Your program must contain the method from Part 1 that returns true if a number is prime; false otherwise and another method that returns the reversal of a positive number. You can reverse the integer in the following way: • Convert the integer into a string value = num.ToString(); • Use the following code to reverse the integer string newNum = “”; for (int l = value.Length; l > 0; l--) newNum = newNum + value[l-1]; Also, your program should have a TextBox that will accept a positive integer from the…JAVA Problem description:You are to write a program called Seasons that prompts the user for a month and day and displays the season in which that date occurs. For reference, we will use the following date cutoffs for the various seasons: Winter December 21 – March 19 Spring March 20th – June 20th Summer June 21st – September 20th Fall September 21st – December 20th Data Validation For this program, you'll write a specific method to perform data validation based on the month and day entered. More specifically: Month – the month entered must be a valid month of the year (January – December). Day – the day entered must be a valid day for that month: January, March, May, July, August, October, December have 1-31 days. April, June, September, November have 1-30 days. February has 1-28 days (do not worry about leap years) Required program decomposition String getMonth(Scanner console) This method is called from the main method and should prompt for the month as a string…
- Use Java programming language Write a program that asks the user to enter 5 test grades (use an array to store them). Output the grades entered, the lowest and highest grade, the average grade, how many grades are above the average and how many are below and the letter grade for the average grade. Create a method that returns the lowest grade. Create a method that returns the highest grade. Create a method that returns the average grade. Create a method that returns how many grades were above the average. Create a method that returns how many grades were below the average. Create a method that returns the letter grade of the average (90-100 – A, 80-89 – B, 70-79 – C, < 70 – F)IN JAVA "New Employee Gross Salary Calculator" Write a method that accepts an employee's yearly salary and start date and calculates their gross salary from the provided start date up through the end of the year Employees always start on the first of the month Throw an IllegalArgumentException if the provided start date is not the first of the month Employees qualify for a 3% pay raise 3 months after their start date and another 6% 3 months after that Use appropriate data typeA Java Practical Assignments.pdf - Adobe Acrobat Pro DC (32-bit) File Edit View E-Sign Window Help Home Tools Java Practical Assig. x Sign In 1 /1 139% Java Practical Assignments 1. 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. 2. Create a program that allows a user to input customer records (ID number, first name, last name, and balance owed) and save each record to a file. 3. Write an application for Limpopo's Car Care Shop that shows a user a list of available services: oil change, tire rotation, battery check, or brake inspection. Allow the user to enter a string that corresponds to one of the options, and display the option and its price as R250, R220, R150, or R50, accordingly. Display an error message if the…
- The weather generator methods you will be writing for this assignment will: predict future precipitation pattern for one month: oneMonthGenerator find the number of wet or dry days in a given month’s forecast: numberOfWetDryDays find the longest wet or dry spell in a given month’s forecast: lengthOfLongestWetDrySpellJava Program Chapter 5. PC #13. is Prime Method A prime number is a number that is evenly divisible only by itself and 1. For example, the number 5 is prime because it can be evenly divided only by 1 and 5. The number 6, however, is not prime because it can be divided evenly by 1, 2, 3, and 6. Write a method named isPrime, which takes an integer as an argument and returns true if the argument is a prime number, or false otherwise. Demonstrate the method in a complete program. The program should ask the user to enter a number for primality test or a negative number to exit. Tip: Recall that the % operator divides one number by another, and returns the remainder of the division. In an expression such as num1 % num2, the % operator will return 0 if num1 is evenly divisible by num2. I do not want a goodbye system out in the program and it has to pass all the test cases. Test Case 1 Please enter a number to check for primality or -1 to exit:\n2ENTER2 is a prime…JAVA Write a class that calculates add, subtraction, and multiplication. The class should include the following methods: Constructor : initialize all values to 0 getAsk() : Ask users to input two integer numbers. This method calls Distribute() method. Distribute() : Ask users to choose which calculation he/she wants. This method calls a method that can add, subtract, or multiply based on the user's option. CalAdd() : add two numbers CalSub() : subtract two numbers CalProduct() : multiply two numbers toString() : toString method that display result of operation. The program should be designed to test the class developed. Your program might look like the following: public class CalculateNumTesting{ public static void main(String[] args){ CalculateNum calculation = new CalculateNum(); calculation.getAsk(); System.out.println(calculation); } }
- .is a block of code which only runs when it is called A classs integer method loopTrue or False? Arrays cannot be passed as parameters, but must be used only in the main method.Free Response Question: 28. Write a method that will return true if a randomly generated number between 1 and 10 is less than or equal to 4. public static boolean FortyPercentOrLess() { }