memory - Are non-static fields static until they're changed in Java? -

let's consider following code:

public class testing {     static int = 47;      public static void main(string[] args) {         testing t1 = new testing();         testing t2 = new testing();         system.out.println(t1.i == t2.i); 

i'm creating static field belonging testing class , field shared among 2 instances of class t1 , t2 well. test if reference same value in memory , indeed, do, result true. , that's clear me.

however, if delete static keyword declaration of int i, unexpected happen.

public class testing {     int = 47;      public static void main(string[] args) {         testing t1 = new testing();         testing t2 = new testing();         system.out.println(t1.i == t2.i); 

i expect 2 instances t1 , t2 both have 47 value of field fields in different memory addresses. surprisingly, when test t1.i == t2.i true in case - why? field int = 47; not static anymore expect in different memory addresses every instance of class equality yields true.

an int primitive type, not reference type. condition t1.i == t2.i not test reference equality -- there no reference in first place here. compares values , in case, both have value 47.

if had member field not primitive, result different, example:

public class testing {     integer = new integer(47);      public static void main(string[] args) {         testing t1 = new testing();         testing t2 = new testing();         system.out.println(t1.i == t2.i);   // false     } } 

in case, each instance has different reference integer object created using new keyword invokes constructor, , condition t1.i == t2.i compares these 2 references.