java - What if I create an object of Class Two in Class One itself and then access Class Two's data...What will be the difference? -

here in code snippet of object relation, taking reference of class 2 in class one, , through accessing class two's members.

what if create class two's object in class 1 , access methods? difference in doing ?

i know missing concept here not getting it.

// object relation using references   package object_relation;  class 1 {     // instance variables     int x;     2 t;     public one(two t) {         this.t = t;         x=10;     }      void display() {         system.out.println("class 1 members : ");         system.out.println("x = "+x);         system.out.println("displaying class 2 members using method");         t.display();    system.out.println("displaying class 2 members using reference :");         system.out.println("y = "+t.y);     } }  class 2 {      //  instance variables     int y;     public two(int y) {         this.y = y;     }      public void display() {         system.out.println("y = "+y);     }  }  public class usingreference {     public static void main(string[] args) {         2 t2 = new two(20);         1 o = new one(t2);         o.display();     } } 

i not sure question is?

but here in example 1 , 2 both different classes. , in-order access non-static member variables need object of class two.

are looking concept inner class in java:- example

public class outerclass {    int i;    public void method1() {     system.out.println("inside method 1");   }    class innerclass {     int j;      public void method2() {       system.out.println("inside method 2");     }   }    public static void main(string[] args) {     // instantiate inner class, must first instantiate outer class     outerclass outerobject = new outerclass();     outerobject.method1();      // then, create inner object within outer object     outerclass.innerclass innerobject = outerobject.new innerclass();     innerobject.method2();   }  } 

ps: here innerclass member of outerclass.