Why interface not need prior intialization??????

/* Why prior intialization is not necessary in Interfaces*/
/* If i run following program it runs but if interface I1 is not intialize
At loading of class so how does T2 get intialized in class
pls hlp me out*/
interface I1{
public static int T1=56;
public static int T2=(int)(Math.random()*20);
}

interface I2 extends I1{
int T3=89;
}
public class a implements I2{
public static void main(String args[]){
System.out.println(T1);
System.out.println(T2);
System.out.println(T3);
}
}

Yogesh,
All variables declared in interfaces are public static final. This is true if you declare them so or not.
In your interface I1, you are initializing T2 with some random integer. When the class is loaded all static variables are initialized first. That is the time when T2 gets initialized. Once defined its value cannot be changed.