Scope of static variable and methods in Java

Question

I have some doubts about usage of static method in Java. I read many places static variables are instance independent so be comes global.

public class ThirdC         


        

Answer 1

@eternal I think I am getting the point you wanna ask. I tested this (with some minor compile changes) on Jboss. The results were: Once deployed the scope of class ThirdClass seems to be application deployment level. And the static value of var was retained while multiple method calls.

Here is the basic structure i used.

public class ThirdClass {
public static var = "Java";
}

public class Second class{

  public  void testA {
  ThirdClass ob1 = new ThirdClass();    // not needed , just kept for clarity.
  System.out.println(ThirdClass.var);   
  ThirdClass.var="Ruby";
  ThirdClass ob2 = new ThirdClass();        
  System.out.println(ThirdClass.var);  
} 

 public class First {

  public  void testB {
  ThirdClass ob3 = new ThirdClass(); 
  System.out.println(ThirdClass.var); 
   ThirdClass.var="CSHARP";

 }

 public  void testC {
 ThirdClass ob4 = new ThirdClass(); 
 System.out.println(ThirdClass.var);        

} 

By webservices calls ( i have a setup) called these methods in secquence testA() --> Display var = "Ruby"

testB() --> Display var = "Ruby"

testC() --> Display var ="CSHARP"

So the new changed values were shared by DIFFERENT METHOD CALLS throught application deployment. So scope of ThirdClass was deployment level.