Thanks.
I get paid for C++ while programming with Java is my past time! Even
with lots of drink, I wont be able to  forget it (Otherwise I wont be
able to get drink).
subList looks quite reasonable, as the Java List itself is nothing more
than iterator. Thus sublist looks like an iterator only. However I am
not convinced of unmodifiableList. As Java doesn't provide a way to
return final reference, how would it be possible! . I looked at the
Collections code curiously and found all of the methods throws some
UnsupportedOperation  exception. That says that the list can not be
modified. However I want the list element should not be able to
modified  Just like const_iterator in C++. As the List returns a get
reference to object, the object always can be modified.
Just from the following code, it is evident.
import java.util.*;
class MyClass{
    public int x;
    public MyClass(int x){
        this.x = x;

    }
    public String toString(){
        return Integer.toString(x);
    }
};
class Test{
    public static void main(String[] args){
        ArrayList list = new ArrayList(10);
        list.add(new MyClass(10));
        list.add(new MyClass(11));
        list.add(new MyClass(12));
        list.add(new MyClass(13));
        list.add(new MyClass(14));
        list.add(new MyClass(15));
        list.add(new MyClass(16));
        list.add(new MyClass(17));
        System.out.println(list);
        List range = list.subList(2,4);
        System.out.println(range);
        List cList = Collections.unmodifiableList(range);
        System.out.println(cList);
        MyClass c = (MyClass)cList.get(0);
        c.x = 14;
        System.out.println(((MyClass)cList.get(0)).x);
        System.out.println(cList);

    }
};
Ignore, 1.5 warnings. I compiled it with non-generic option.
I want the list element not to get modified (with or without iterator).
Something like C++ const_iterator. Can it be done directly or
indirectly? Ofcourse, other non const reference to the element may be
able to modify it. However I want unmodifiableList , or whatever it may
be wont be able to modify it.

Thanks for help & quick answer.