Java Program - Relationship between Objects

public class First {

public static void main(String[] args) {
// TODO Auto-generated method stub
Sec obj1 = new Sec(20);
Demo obj2 = new Demo(obj1);
obj2.display();
}
}


public class Demo {
Sec t;
int x;
Demo(Sec t){
this.t=t;
x=10;
}
void display(){
System.out.println("The value of x is " +x);
System.out.println("The value of y in Other object is " +t.i);
}
}

public class Sec {

int i;

Sec(int i){

this.i=i;

}

void display(){

System.out.println("The value of i is " +i);

}

}

output:-

The value of x is 10

The value of y in Other object is 20