T/F 3. Any Java class must have a main method, which is the first method that is called when the Java class is invoked.

T/F 1. Java methods can only return primitive types

To refer to a Java class from an application without qualification, you need to import the class unless that class a. contains only static methods b. is stored in a package c. is stored in a package that has already been imported

Java prgm based

Please help with the following: C# .NET change the main class so that the user is the one that as to put the name a driver class that prompts for the person’s data input, instantiates an object of class HealtProfile and displays the patient’s information from that object by calling the DisplayHealthRecord, method. MAIN CLASS---------------------- static void Main(string[] args) { // instance of patient record with each of the 4 parameters taking in a value HeartRates heartRate = new HeartRates("James", "Kill", 1988, 2021); heartRate.DisplayPatientRecord(); // call the method to display The Patient Record } CLASS HeartRATES------------------- class HeartRates { //class attributes private private string _First_Name; private string _Last_Name; private int _Birth_Year; private int _Current_Year; // Constructor which receives private parameters to initialize variables public HeartRates(string First_Name, string Last_Name, int Birth_Year, int Current_Year) { _First_Name = First_Name;...

True or False 1) After a user defines his/her own constructor in a Java class, the default constructor is still available. ​___(2) Java supports multiple inheritances directly. ​___(3) Some methods in an interface can have method body.

Java A class always has a constructor that does not take any parameters even if there are other constructors in the class that take parameters. Choose one of the options:TrueFalse

Charge Account Validation Using Java programming Create a class with a method that accepts a charge account number as its argument. The method should determine whether the number is valid by comparing it to the following list of valid charge account numbers:5658845 4520125 7895122 8777541 8451277 13028508080152 4562555 5552012 5050552 7825877 12502551005231 6545231 3852085 7576651 7881200 4581002These numbers should be stored in an array. Use a sequential search to locate the number passed as an argument. If the number is in the array, the method should return true, indicating the number is valid. If the number is not in the array, the method should return false, indicating the number is invalid.Write a program that tests the class by asking the user to enter a charge account number. The program should display a message indicating whether the number is valid or invalid.

Problem Description and Given Info For this assignment you are given the following Java source code files: IStack.java (This file is complete – make no changes to this file) MyStack.java (You must complete this file) Main.java (You may use this file to write code to test your MyStack) You must complete the public class named MyStack.java with fields and methods as defined below. Your MyStack.java will implement the IStack interface that is provided in the IStack.java file. You must implement your MyStack class as either a linked list or an array list (refer to your MyArrayList and MyLinkedList work). Your MyStack must not be arbitrarily limited to any fixed size at run-time. UML UML CLass Diagram: MyStack Structure of the Fields While there are no required fields for your MyStack class, you will need to decide what fields to implement. This decision will be largely based on your choice to implement this MyStack as either an array list or a linked list. Structure of the Methods As...

PLZ help with the following: IN JAVA A value of an enumerated type is similar to a/an: (a) Instance variable (b) Object of a class (c) Named constant (d) None of the above

Java requires its method arguments to be sent in as values, not references. And what, precisely, does it entail?

T/F 3. All Java classes must contain a main method which is the first method executed when the Java class is called on.

In order to do a range of tasks, both code and forms employ the ACTION and METHOD attributes.