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

JAVA ARRAY MANIPULATION QUESTION: make a method called manipulator that takes a double array as parameter and modifies it. The method will modify the array then print the array. The method must modify the existing array, it CAN NOT create a different array as the solution. The manipulator method will be a void method. Remember: To get an average of 2 digits you add them together then divide by 2. Average of x and y = (x+y)/2 Modifications the method will do: For every 2 consecutive elements in the array, both the elements are replaced by their average. If the number of elements in an array is odd don't modify the last number of the array. Basically, you find the average of 2 consecutive elements then replace both of the elements with that value. Examples: Array = {2.0,3.0} will be changed to {2.5,2.5} when passed to the manipulator method Array = {2.0,3.0,45} will be changed to {2.5,2.5,45} when passed to the manipulator method Array = {2.0,3.0,45,55} will be changed to…

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.

Computer Programming 1 Homework #2 Write a Java program to make two arrays containing random integer values (You can make these arrays with specific sizes using the below makeRandomArray method). The program should sum these two arrays and prints the resulted array (the array that contains the result of the two arrays summing). The program should also show the maximum element of the resulted array. Your program must define and call the following methods to perform the program as illustrated above: 1- A method int [] makeRandomArray(int size ,int a , int b) that makes and returns an array with specific size. The methods fills this array with random integers in a range [a..b] 2- A method public static int findmax(int x[ ]) that finds the maximum value of a number of x array passed to the method. 3- A method public static void printArray(int x[]) that prints the elements of the array x passed to the method. 4- A method public int[ ] sumTwoArrays(int x[ ], int y[ ]) that sums the elements…