Array: An array is defined as a group that consists of similar data types. The array size must be specified by an “int” value and not long or short. In Java, all arrays are allocated dynamically. An array is always indexed, starting from 0. Declaring an array reference and creating an array: To insert elements to an array, first an array has to be created by using new operator and then the reference variable is assigned. The syntax is as follows, arrayRefVar = new elementType[arraySize] From the above statement it is clear that, an array is created using new elementType[arraySize] and then the reference to the newly created array is assigned to the variable arrayRefVar. It is possible to declare an array variable, create an array and assign the reference to a variable in a single statement itself. The syntax will be as follows, elementType[]arrayRefVar = new elementType[arraySize]; elementType arrayRefVar[]= new elementType[arraySize); Example: double myFile = new double[20]; The statement given above declares an array variable myFile and then creates an array that consists of 20 elements which are of the datatype double and at last assign the reference to myFile.

Question

Want to see the full answer?

Answer 1

Question

Chapter 7.3, Problem 7.13CP

Program Plan Intro

Array:

An array is defined as a group that consists of similar data types.

The array size must be specified by an “int” value and not long or short.

In Java, all arrays are allocated dynamically.

An array is always indexed, starting from 0.

Declaring an array reference and creating an array:

To insert elements to an array, first an array has to be created by using new operator and then the reference variable is assigned.

The syntax is as follows,

arrayRefVar = new elementType[arraySize]

From the above statement it is clear that, an array is created using new elementType[arraySize] and then the reference to the newly created array is assigned to the variable arrayRefVar.

It is possible to declare an array variable, create an array and assign the reference to a variable in a single statement itself.

The syntax will be as follows,

elementType[]arrayRefVar = new elementType[arraySize];

elementType arrayRefVar[]= new elementType[arraySize);

Example:

double myFile = new double[20];

The statement given above declares an array variable myFile and then creates an array that consists of 20 elements which are of the datatype double and at last assign the reference to myFile.

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Students have asked these similar questions

Sultan Qaboos University Department of Computer Science COMP2202: Fundamentals of Object Oriented Programming Assignment # 2 (Due 5 November 2022 @23:59) The purpose of this assignment is to practice with java classes and objects, and arrays. Create a NetBeans/IntelliJ project named HW2_YourId to develop a java program as explained below. Important: Apply good programming practices: 1- Provide comments in your code. 2- Provide a program design 3- Use meaningful variables and constant names. 4- Include your name, university id and section number as a comment at the beginning of your code. 5- Submit to Moodle the compressed file of your entire project (HW1_YourId). 1. Introduction: In crowded cities, it's very crucial to provide enough parking spaces for vehicles. These are usually multistory buildings where each floor is divided into rows and columns. Drivers can park their cars in exchange for some fees. A single floor can be modeled as a two-dimensional array of rows and columns. A…

Description: Write a method that return the average of an array with the following header: public static double average(double[] array); In the main method, 5 double numbers are required to be entered. Input Example: 1.2 1.2 1.3 1.3 1.35 Output Example: The average value is 1.27

Homework - identical arrays for one-dimensional: Write a test program which prompts a user to enter the size of two arrays as well as to fill their elements. After that, the program checks the same contents of the elements of the two arrays. If these arrays are equal, the program displays message which is "The two arrays are identical". If not equal, displaying "The two arrays are not identical". Write an equals method that reads two arrays and displays these messages above.