Static vs INstance variables? In non thread safe classes like Servlets and Action.

class StaticVariableClass
{
        public static int i = 0;
        
        public int nonstatic = 0; 
        
}
 
public class StaticTest
{
        public static void main(String[] args)
        {
                StaticVariableClass.i = 1;
                StaticVariableClass svc1 = new StaticVariableClass();
                svc1.nonstatic = 1;
                StaticVariableClass.i = 2;
                StaticVariableClass svc2 = new StaticVariableClass();
                svc2.nonstatic = 2;
                StaticVariableClass.i = 3;
                StaticVariableClass svc3 = new StaticVariableClass();
                svc3.nonstatic = 3;
                StaticVariableClass.i = 4;
                StaticVariableClass svc4 = new StaticVariableClass();
                svc4.nonstatic = 4;
                StaticVariableClass.i = 5;
                
                System.out.println("StaticTest.main() :StaticVariableClass.i: " + StaticVariableClass.i);
                System.out.println("StaticTest.main() :svc1.i: " + svc1.i);
                System.out.println("StaticTest.main() :svc2.i: " + svc2.i);
                System.out.println("StaticTest.main() :svc3.i: " + svc3.i);
                System.out.println("StaticTest.main() :svc4.i: " + svc4.i);
                
                System.out.println("StaticTest.main() :svc1.i: " + svc1.nonstatic);
                System.out.println("StaticTest.main() :svc2.i: " + svc2.nonstatic);
                System.out.println("StaticTest.main() :svc3.i: " + svc3.nonstatic);
                System.out.println("StaticTest.main() :svc4.i: " + svc4.nonstatic);
                
                
        }
}

                                              

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class StaticVariableClass extends Thread
{
        public static int sttatic = 0;
        
        public int nonstatic = 0; 
 
        public void run()
        {
            sttatic++;
            nonstatic++;
System.out.println("Threadname = " + thread.currentThread().getName());
            System.out.println("static=" + sttatic);
            System.out.println("nonstatic=" + nonstatic);
        }
}
################################
public class StaticTest
{
        public static void main(String[] args)
        {
            Thread thread1 = new StaticVariableClass();
            thread1.start();
            
            Thread thread2 =  new StaticVariableClass();
            thread2.start();      
        }
}
 
###################output
Threadname = Thread-0
static=1
nonstatic=1
Threadname = Thread-1
static=2
nonstatic=1

                                              

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