cofusion with static and ordinary variables and methods

I am confusing when i am using static variables in a class
my confusion is when to use like i am declaring as below

1) public static varaible1;
2) private static variabl2;

and methods like this ,for example we have class like this

Code:

---

public class StaticEx(){
  private static stVarible = "XXXX";
 
  public static String  getStVarible(){
    returtn stVarible;
 }
 
 public static void setStVarible(String varr){
  stVarible = varr;
 }

---

I have no idea what it is you're complaining about.

what i mean is .when we use this kind of classes .

When it's appropriate. When the information concerned is applicable to all instances of a class collectively and is not something that is specific to a specific instance of the class. (which is the definition of static)

thank u.
I heard that static varibles are not synchronised is it true?If it is true why
static variables are not eligible for synchronisation

Per default, no. You can synchronize them though (or at least the access to them).

confused,I think when ever a static variable is created in a class it is placed some memory location and each and every object of class shares the same memory location to acess it[in case it is needed] not like just instance variables.when ever multiple objects acessing a static variable how synchronisation can be done.[because it is not object related it is refered to class] .

I am not sure whether i am wrong or correct.

If i am wrong please explain how synchronising can be done on static variable.

ok i am just stoping here. i start new thred for this.thanks for your replies