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

What is JMS queue, Staging areas that have messages those have been sent an...

Staging areas that have messages those have been sent and are waiting to be read. Note that, contrary to what the name queue suggests, messages don't have to be delivered in the or

Describe importing classes in java, Describe Importing Classes in java? ...

Describe Importing Classes in java? Fully qualified names such as java.net.URL are not the most convenient thing to have to type. You can use the shorter class names like URL w

Create a jsp code to built an application, What is required to be done from...

What is required to be done from my programming is : I enter name,day(saturady or sunday),time( 10AM and 10PM) My program must then vaildate name,day and time. Name must only a

Explain multi dimentional arrays in java, Explain multi dimentional arrays ...

Explain multi dimentional arrays in java? So far all these arrays have been one-dimensional. That is, a single number could locate any value in the array. Therefore sometimes d

Android App Clone, Hello, My friend Roshan from India told me that you pro...

Hello, My friend Roshan from India told me that you provide a high quality programming service which is why I''m here. I would like you to make a clone of an android app the app

Java application for create-read-update in table, You are required to imple...

You are required to implement a Java application that allows a user to create, read, update and delete data in a table in a MySQL database. Your program must use a Java class that

Inner, #question.Hi, i hope my message find you very well. could you help m...

#question.Hi, i hope my message find you very well. could you help me please with this question . provide an example code for an anonymous inner class. Highlight what makes your e

Describe java operators, Describe java operators? An operator is a symb...

Describe java operators? An operator is a symbol which operates on one or more arguments to generate a result. The Hello World program is so easy it doesn't use any operators,

Need mahjong puzzle game, Need Mahjong puzzle game I want someone to mak...

Need Mahjong puzzle game I want someone to make this game ( Mahjong puzzle game) for me in Android ONLY. If you have high level programming knowledge in Android then please b

Need software to print bills on a4 pape, Need software to print bills on A4...

Need software to print bills on A4 paper in the format provided. The details are shown below - 1. Serially generated Invoice Number. 2. Appropriate fields in the invoice have

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