In Java, we may create arrays of objects of a certain class. In or out?

USING JAVA: Part A) Implement a superclass Appointment and subclasses Onetime, Daily, and Monthly. An Appointment has a description (for example, "See the dentist") and a date. Write a method, occuresOn(int year, int month, int day) The check whether the appointment occurs on that date. For example, for appointment, you must check whether the day of the month matches. This fill an array of Appointment objects with a mixture of appointments. Have the user enter a date and print out all appointments that occur on that date. Part B) Improve the appointment book by giving the user the option to add new appointments. The user must specify the type of the appointment, the description, and the date.

In java ****

This is in Java. The assignement is to create a class. I am confused on how to write de code for an array that is up to 5. Also I am confused regarding how to meet the requirements of the constructor. This is what I have. public class InventoryOnShelf { //fields private int[] itemOnShelfList []; private int size; public InventoryOnShelf() { }

Please answer question. This is pertaining to Java programming language 3-20

Constructor overloading is not possible in java.True or False.

In java Define and create an array (called emps) of object references for objects of class Employee of length 100. (b) Create three objects for classes SalariedEmp, WeeklyEmp, and HourlyEmp (where these 3 classes are subclasses of class Employee); and with references e1, e2, e3 for the 3 objects:(c) Assign e1,e2, e3 to the first three elements of array emps:(d) Print the earnings of the 100 employee in the array emps in one loop (with polymorphism) where earnings are calculated with method earnings():

For the programming language Java

** in Java ** Suppose we have a set of car. Each car has a number of colors, number of places, dimension and power. According to the set of cad we can have three sets: sedan, sport and pickup truck.1. Write a java program using the previous description.2. Use the flowing concepts,: heritage, polymorphism, encapsulation (get and set method)

In java, can a polymorphic reference invoke a method that is only declared at the object's class level? If "yes", explain how.

Java programming - please see attched image for initial instruction before the following below. Write a subclass of VowelSeparator that adds three additional methods and a constructor. The class should be named VowelSeparatorAndCounter. Here are the methods to add: void setString(String s) This method should replace the string stored by the object with s. If the argument is null then the method should throw an IllegalArgumentException. (This is an unchecked exception) int getVowelCount() This method should return the number of vowels in the string.int getNonVowelCount() This method should return the number of characters in the string that are not vowels. Write a static method that accepts an array of VowelSeparatorAndCounter objects and returns the total number of vowels contained in all of them. It should have the following signature: public static int totalVowelCount(VowelSeparatorAndCounter[] a)

In Java, we can create an array of class objects. True O False

First, you need to design, code in Java, test and document a base class, Student. The Student class will have the following information: A. Title of the student (eg Mr, Miss, Ms, Mrs etc)B. A first name (given name)C. A last name (family name/surname)D. Student number (ID) – an integer number (of type long)E. A date of birth (in day/month/year format – three ints) - (Do NOT use the Date class from JAVA)The student class will have at least the following constructors and methods:(i) two constructors - one without any parameters (the default constructor), and one with parameters to give initial values to all the instance variables.(ii) a reasonable number of set and get methods.(iii) methods to compute the final overall mark and the final grade (which will be overridden in the respective child classes). These two methods will be void methods that set the appropriate instance variables. Remember one method can call another method. If you prefer, you can define a single method that sets...