Static is a keyword in java used to create static methods, variable inside a class and static class.Static variable is also called class variable which belongs to class not to object.Static variable is declared inside a class but outside the method or Constructor.
Static variable in java.
- Static is a keyword in java used to create static methods, variable inside a class and static class.
- Static variable is also called class variable which belongs to class not to object.
- Static variable is declared inside a class but outside the method or Constructor.
- These variable are initialized first before initializing of any instance variable.
- A single copy is shared by a class, as many objects are created.
- Static variable is accessed without creating object of class using class name.
- Static variable are created when the program starts and destroys when the program stop.
- Visibility of class/static variable is same but mostly it is public. Because it is visible for all user in the class.
Syntax : Classname.variablename;
Example: Using Static Variable.
public class Staticvariable
{
static double salary; //static variable
int age; //non static variable
Staticvariable()
{
age=23;
}
public static void main(String args[])
{
salary=10000;
Staticvariable sv= new Staticvariable(); // creating object for accessing non static member.
System.out.println("Salary of Employee is="+Staticvariable.salary); // accessing static variable through class name.
System.out.println("Age of of Employee is="+sv.age); // Accessing non static variable through object.
}
}
In the above program , Class has two variable one is class variable as salary and another one is non-static variable as age , age accesses by object of the class (sv) and salary is accessed directly by classname.
Output : After Compiling and Executing of above program.
s