• Tuesday, September 30, 2014

    6. Java - Variables

    Java Variable
    A variable is a named memory location where we can store different types of values.
    The value of a variable may be changed during the execution of the program.
    Variables are of different types for storing different values.

    Types of Value            Keword                  Example
    Integer Valuesintint m=5;
    Character Typecharchar a='v'
    String ValuesStringString myStr="test"
    Double Valuesdoubledouble myDbl=2.564
    Boolean(true or false)BooleanmyBool=true;

    Following program clear the concept of the variable:

    class VariableTest
    public static void main(String args[])
    int myInteger;
    char myCharacter; /*It can store one character value*/
    String myString;
    double myDouble;
    Boolean myBoolean; /*Boolean can only store true or false value.*/


    System.out.println("My integer variable value: " + myInteger);
    System.out.println("My String variable value: " + myString);
    System.out.println("My Boolean variable value: " + myBoolean);
    System.out.println("My double variable value: " + myDouble);
    System.out.println("My Charater variable value: " + myInteger);

    /* We can change the variable value. Example: */

    System.out.println("My new integer variable value: " + myInteger);


    Note:  Variables can also assign for storing instance of a class(object)

    Previous: 5.Creating Objects               Next: 7.Datatypes

    Syed Masoom Rizvi

    Author & Editor

    Hi, This is Syed Masoom Rizvi, who is continue exploring the world of programming ,programming and programming... :)


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