Arrays in Java

An array is a container object that holds a fixed number of values of a single data type. The length of an array is established while the array is created. After creation, its length is fixed. The data type of all variables should be same.

Each item in an array is called an element and elements are accessed by their numerical indexes. As shown in the preceding illustration, numbering begins with 0. The 9th element, for example, would therefore be accessed at index 8.

The following program, ArrayDemo, creates an array of integers, puts some values in the array, and prints each value to standard output.

A Sample program and its output



class ArrayDemo {
    public static void main(String[] args) {
        // declares an array of integers
        int[] anArray;

        // allocates memory for 10 integers
        anArray = new int[10];
           
        // initialize first element
        anArray[0] = 100;
        // initialize second element
        anArray[1] = 200;
        // and so forth
        anArray[2] = 300;
        anArray[3] = 400;
        anArray[4] = 500;
        anArray[5] = 600;
        anArray[6] = 700;
        anArray[7] = 800;
        anArray[8] = 900;
        anArray[9] = 1000;

        System.out.println("Element at index 0: "
                           + anArray[0]);
        System.out.println("Element at index 1: "
                           + anArray[1]);
        System.out.println("Element at index 2: "
                           + anArray[2]);
        System.out.println("Element at index 3: "
                           + anArray[3]);
        System.out.println("Element at index 4: "
                           + anArray[4]);
        System.out.println("Element at index 5: "
                           + anArray[5]);
        System.out.println("Element at index 6: "
                           + anArray[6]);
        System.out.println("Element at index 7: "
                           + anArray[7]);
        System.out.println("Element at index 8: "
                           + anArray[8]);
        System.out.println("Element at index 9: "
                           + anArray[9]);
    }
} 

Download Source code of ArrayDemo Program

References : Wikipedia | Oracle share on :        :  

Love to hear your Views / Guidance / Recommendations on this Post…

Explore the Technology World

The mind behind Linux & GIT : Linus TorvaldsLinus Torvalds transformed technology twice — first with the Linux kernel, which helps power the Internet, and again with Git, the source code management syst ...Read MoreTensorflow and deep learningWith Tensorflow ,deep machine learning transitions from an area of research into mainstream software engineering. ...Read MoreJava program to return all possible permutations from collection of distinct numbersexample of Java program to return all possible permutations from collection of distinct numbers ...Read MoreReal Time Analytics with Spring Application Development FrameworkSpring is the most popular application development framework for enterprise Java.Millions of developers use Spring to build simple, truly portable, fast and fle ...Read MorePath Setting in Java When an application is launched from command prompt Windows OS searches for the executable program in the current working directory. The prompt throws an error ...Read MorePicture-in-Picture App for Android devices with Source CodePicture-in-Picture is a special type of multi-window mode mostly used for video playback for Android devices.Released under Apache License 2.0 , which means you ...Read MoreFacebook |Google+ | Twitter | LinkedIn | Youtube About | Cookies-Policy | Disclaimer | Site Map | Contact

Call / Visit for New Batch

Services

Why Join Us

  • ➯ Free Demo Classes
  • ➯ No Registration Fee
  • ➯ Interview Questions
  • ➯ Study Materials
  • ➯ Softwares
  • ➯ Aptitude & Reasoning
  • ➯ Placement Assitance

Address

  • MyJava Training Institute ,
  • Plot No.243 , shop No 14 ,
  • Secnd Floor , Zone-II ,
  • M.P.Nagar , Bhopal,
  • Madhya Pradesh ( 462011 )
  • ☎  08871209400 , 7987028543
  • 🌐 www.myjava.in
FacebookGoogle +TwitterYouTube

MyJava - java Training Institute