Showing posts with label simple java. Show all posts
Showing posts with label simple java. Show all posts

Friday, 20 November 2015

Learning the Concept of Arrays In Java

Arrays in Java

An Array is a group of related data items that share a common name. The extend of an array in Java is established when the array is formed. Once the array is created, the length is fixed.

Array Index and Elements

               A loop with the subscript as the control variable can be used to read the entire array.

One Dimensional Arrays

               A list of items can be given one variable name using only one subscript is called one dimentional array. 

          - Creating an one dimentional array in Java

                   Syntax:   type arrayname[];
                                    type[] arrayname;

Both the above statements do the same operation. Creation of an array in Java is a three step process. 

          i) Array Declaration
         ii) Creation of Memory Location
        iii) Assign Values

i) Array Declaration

          Arrays in Java can be declared in two forms as shown in the syntax above. 

Example for Array Declaration:

          int [] serialnumber;
          int serialnumber[];

ii) Creation of Memory Location

          Create memory location for the declared array. 

Example for creation of memory location:

          serialnumber = new int[5];

The above statement create 5 int type locations for the array serialnumber. We can also declare and create memory location using a single statement in Java.

Example: int serialnumber[] = new int[5];

iii) Assign Values

Assign values means nothing otherthan initialization of arrays. 

Syntax for initializing an Array:

          arrayname[subscript] = value;
          type arrayname[] = {list of values};

First line assign values to particular element in the array and the second statement shows the syntax for assigning a list of values in to an array. 

Example for initializing an array:


Above five statements can be replaced with the single statement below.

int[] serialnumber = {1200, 1201, 1202, 1203, 1204};

Friday, 5 December 2014

10 Facts About Java

Top 10 Interesting Facts About Java

This article refers to few basic facts about Java which show the Purposefulness of Java

  1. 9 out of 10 computers in U.S. run Java and 97% of Enterprise Desktop run it.
  2. Java was originally called Oak.
  3. There are a million Java Developers world Wide.
  4. The median salary for a Java developer in the U.S. is $83973.
  5. Nearly nine of every 10 computers in the U.S. run Java, and 97% of enterprise desktops run the language.
  6. The JUnit testing framework is the top Java technology, used by more than four of five developers. Jenkins is second, used by 70% of developers.
  7. Java is ranked #2 in popularity among programming languages, according to The language C is #1.
  8. 1 Billion Java Downloads per Year
  9. 3 Billion devices run Java
  10. 100% of BLU-RAY Disc Players ship with Java