Explain using an example: a class, an object and different types of constructors. PS: Java

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…

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6 Java

Please include java doc comment

Develop a Shipping Calculator Java application, which contains the concepts of a Java object and class. This Java Program must include the declaration and definition of object and class.   The steps for the program are outlined below:   Create a Java class named Package that contains the following: Package should have three privateinstance variables of type double named length, width, and height.  Package should have one privateinstance variable of the type Scanner named input, initialized to in.  No-args(explicit default) public constructor, which initializes all three double instance variables to 1.0.   Initial(parameterized) public constructor, which defines three parameters of type double, named length, width, and height, which are used to initialize the instance variables of same name.  Public copyconstructor, with a parameter of type Package, used to duplicate an existing Package object.  Three public void methods named inputLength,inputWidth, and inputHeight. Each method will…

True or False Java passes all object-type variables by reference.