Refresh value

[apffal]

I'm using as variable the integer value of last selected index in a list.
However, after removing all items in my list, with removeAll, I cannot refresh that integer value - which is still used when adding new items to it.
How can I do it?
Thanks.

 

[prosper]

//Do you use ArrayList?
//Do you keep the element with the greatest index?
// my code remove all the elements except the elements with greatest index number.

import java.util.*;
class mylist
      {
       public static void main(String args[])
              {
               MyArrayList al = new MyArrayList();
               al.add(new Integer("1"));
               al.add(new Integer("2"));
               al.add(new Integer("3"));
               al.removeRangeB(0,al.size()-1);
               System.out.println(al.size());
              }
      }
class MyArrayList extends ArrayList
      {
       public MyArrayList()
              {
               super();
              }
       public void removeRangeB(int a, int b)
              {
               removeRange(a,b);
              }
      }

 

[apffal]

I'm using a simple list (not ArrayList) for storing ResultSet results and using the value of last selected index for navigating through records.
In my first query, everything goes right.
But, when I remove all list items, for trying another query, the navigation skips one or more records/items.
I think the index value is not being refreshed and is still used when adding new items to list.
How can I solve this ?

That's my relevant code :

class Listener1 implements ActionListener {

static int i, x;

public void actionPerformed(ActionEvent ev) {
-------------------------
while (result.previous()) {
String ord = result.getString(1);
lista0.add(ord);
x = lista0.getItemCount()-1;
t0.setText(lista0.getItem(x));
}
--------------------

prev.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e) {
i = x;
i++;
if(i <= lista0.getItemCount()-1){
t0.setText(lista0.getItem(i));
lista0.select(i);
x = lista0.getSelectedIndex();
}
}
});

next.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e) {
i = x;
i--;
if(i >= 0) {
t0.setText(lista0.getItem(i));
lista0.select(i);
x = lista0.getSelectedIndex();
}
}
});

new_search.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e) {
x = -1;
lista0.removeAll();
}
});

}
}