Staic variables

5/13/2014

public class SimpleClass2 {

/*variables declared in the class but not in a method that have the

keyword static are called Static variables.*/ /*Static variables generally used for protection like database passwords, for this which

people do not wanted to make a copy */

/* class loader creates:

1. Static variables first

* 2. Loads static methods second

* 3. Creates instance variables

* 4. Loads instance methods Ex: File names, and make copies using objects

*/

private static int salary;

private static String name;

public static void main(String[] args) {

/*variables in static methods can only read

and update static variable.
variables in static method must not read and update instance variables*/

SimpleClass2 sc2 = new SimpleClass2();

System.out.println(sc.name); /*wanted to check default value of

instance variable name, displays as null */

salary =30000; /*updating instance variable salary

name = "Jim";

System.out.println(name + " makes $ " + salary);

System.out.println(sc2.name);

}