Array dinamici

[ped451]

Salve volevo sapere cosa sbaglio in questa implementazione:

ArrayList<Integer> nodi = new ArrayList<Integer>();
//      inserimento primo arco
        for (int i=0; i<G.lunghezza; i++){
            nodi.add(i);
        }
                for(int j=0;j<nodi.size();j++){
            System.out.println(nodi.get(j));
        }
        
        System.out.println(nodi.size());
    
        while(nodi.size()>0){
        
        int head = (int)(Math.random()*nodi.size());
        System.out.println("Indice nodo head = "+head);
        int tail = (int)(Math.random()*nodi.size());
        System.out.println("Indice nodo tail = "+tail);
        if(tail!=head || nodi.size()>2){
            System.out.println();        
            System.out.println(nodi.get(head));
            System.out.println(nodi.get(tail));
        nodi.remove(head);
        nodi.remove(tail);
        System.out.println(nodi.size());        

        
        
        }
    
        int head1 = (int)(Math.random()*nodi.size());
        System.out.println("Indice nodo head = "+head1);
        int tail1 = (int)(Math.random()*nodi.size());
        System.out.println("Indice nodo tail = "+tail1);
        if(tail1!=head1 || tail1!=tail || head1!=head || nodi.size()>2){
            System.out.println();        
            System.out.println(nodi.get(head1));
            System.out.println(nodi.get(tail1));
        nodi.remove(head1);
        nodi.remove(tail1);        
        System.out.println(nodi.size());
        
        
        }
        
        nodi.size();
    } 

mi da questo errore:

Numero nodi = 10 Numero archi = 35

[0,0]:
[1,1]:
[2,2]:
[3,3]:
[4,4]:
[5,5]:
[6,6]:
[7,7]:
[8,8]:
[9,9]:
[10,10]:

0
1
2
3
4
5
6
7
8
9
10
11
Indice nodo head = 10
Indice nodo tail = 2

10
2
9
Indice nodo head = 7
Indice nodo tail = 5

8
6
7
Indice nodo head = 3
Indice nodo tail = 0

4
0
5
Indice nodo head = 0
Indice nodo tail = 3

1
7
3
Indice nodo head = 0
Indice nodo tail = 2

3
7
Exception in thread "main" java.lang.IndexOutOfBoundsException: Index: 2, Size:
2
        at java.util.ArrayList.RangeCheck(ArrayList.java:547)
        at java.util.ArrayList.remove(ArrayList.java:387)
        at Generatore3.main(Generatore3.java:65)
Press any key to continue... 

Grazie mille!!!