How to initialize array in java, JAVA Programming

Assignment Help:

How to initialize array in java ?

Individual elements of an array are referenced through the array name and through an integer that represents their position in the array. The numbers you use to identify them are known as subscripts or indexes within the array.

Subscripts are consecutive integers starting with 0. Thus the array k above has components k[0], k[1], and k[2]. Since you begin counting at zero there is no k[3], and trying to access it will throw an ArrayIndexOutOfBoundsException. You can use array components wherever you'd use a similarly typed variable that wasn't element of an array. For instance this is how you'd store values in the arrays above:

k[0] = 2;
k[1] = 5;
k[2] = -2;
yt[17] = 7.5f;
names[4] = "Fred";

This step is known as initializing the array or, more precisely, initializing the elements of the array. Sometimes the phrase "initializing the array" is used to mean while you initialize all the elements of the array.

For even medium sized arrays, it's unwieldy to specify each element individually. It is frequent helpful to use for loops to initialize the array. Here is a loop which fills an array along with the squares of the numbers from 0 to 100.

float[] squares;
squares = new float[101];
 for (int i=0; i <= 100; i++) {
   squares[i] = i*i;
}

Two things you should note about this code fragment:

  1. Watch the fenceposts! Since array subscripts begin at zero you required 101 components if you need to involved the square of 100.
  2. While i is an int, it is promoted to a float when it is stored in squares, since squares is declared to be an array of floats.

Related Discussions:- How to initialize array in java

Javascript validation, Javascript validation, JAVA Programming 1. Obtaining...

Javascript validation, JAVA Programming 1. Obtaining the new script: Download and save the attached comment CGI mailer script form-mail2.pl to your server''s cgi-bin directory, and

Small projects, i am doing java and want projects with solutions to practic...

i am doing java and want projects with solutions to practice more and more

Explain the methods of java.lang.object, Explain The Methods of java.lang.O...

Explain The Methods of java.lang.Object? java.lang.Object gives a number of methods that are general to all objects. toString() is the most general such method. Because the def

How to scaling images in java applet, How to Scaling Images in java applet?...

How to Scaling Images in java applet? You can scale an image within a particular rectangle using this version of the drawImage() method: public boolean drawImage(Image img,

Use javascript create some basic client-side validation, The last exercise ...

The last exercise of each assignment will be continuous from assignment to assignment and will have the goal of building an e-store website by the end of the course. Date & Tim

Define high-level thread states?, The state chart diagram given below defin...

The state chart diagram given below defines the thread states.     1.      Runnable - waiting for its turn to be picked for performing by the thread scheduler based o

Brute force search, how to implement brute foce in a program?

how to implement brute foce in a program?

Implement decision tree algorithm using netbeans, Implement Decision Tree A...

Implement Decision Tree Algorithm using Netbeans (Java) & Microsoft Access 2007. "One Level is enough, output should contains gain of each attribute, the selected attribute and

Explain how several ways businesses monitor their employees, Explain how se...

Explain how several ways businesses monitor their employees? Systems are available in which monitor or most every key stroke which an employee forms on computer. Systems are av

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd