Can anyone tell me while this loop doesn't finish looping?

[Joseph Tulowiecki]

ArrayList<ArrayList<Integer>> currentCombos = new ArrayList();

        //For each i size combination that must be tested
        for(int j = 2; j < fullTable ; j++){
        System.out.append("j = " + j);      
            //For each value from the previous test that wasn't a key
            for(ArrayList<Integer> lc : lastComboRow){
                    
                //Set index to position in the middle column that comes
                //after the position that contains the last attribute in
                //the current combination.
                int index = ad.getLeftAndRightCols().indexOf(lc.get(
                        lc.size() - 1)) + 1;
                    
                if(index < ad.getLeftAndRightCols().size()){

                    //For each remaining value in the middle column
                    for(int x = index; x < ad.getLeftAndRightCols().size();
                        x++){
                        
                        //Add the value to the current combination
                        ArrayList<Integer> temp = new ArrayList();
                        temp = Utilities.copyIntArrayList(lc);
                        temp.add(ad.getLeftAndRightCols().get(x));
                        
                        //test for closure on the new node
                        if(! Utilities.isSubsetOfKey(k.getAllKeys(), temp)){
                            ArrayList<Integer> temp2 = new ArrayList();
                            temp2 = Utilities.copyIntArrayList(temp);
                            if(performClosure(temp2)){
                                k.addKey(temp);
                                System.out.println("Keys so far are " + k.getAllKeys().toString());
                                    
                            }else{
                                currentCombos.add(temp);
                            }
                        }
                    }
                }
            }
            lastComboRow.clear();
            lastComboRow = Utilities.copyArrayOfArrays(currentCombos);
            currentCombos.clear();
        }
        System.out.println("Testmids finished");
    }

this loop should run twice and it only runs once. It seems to freeze. I threw a couple printlns in there for testing. The "Testmids Finished" line never prints so somewhere in the loop its freezing. I also checked to see if the freeze is happening in any other methods that are being called by this method and that is not the case. The problem is in this method and I can't figure it out for the life of me. The top loop, is

for( int j = 2; j < fullTable; j++)

fullTable = 4
so the loop should run for j =2 and j = 3 then stop. It only runs for j = 2 that nothing happens, the program doesn't finish. There are no run time errors either. Any ideas?
(Also if anyone see's any suggestions on how to make this code nicer please let me know as I have no idea what I'm doing :] ) I am copying arrays all the time which seems like such a waste. When I pass these arrays to other methods, they modify the array and I need the original value so I need to make copies of arraylists over and over. Is there a way to avoid this? My main question is why is this program freezing though. THanks

[Akhilesh Trivedi]

try printing ad.getLeftAndRightCols().size() inside the second (inner) loop.

[fred rosenberger]

System.out.println() is your best friend. stick them in all over the place. I frequently put them in as the first and last line in each loop body, printing the conditional variable to see if it is changing how I think it should. you can start narrowing down where the problem is and remove the ones you don't care about, and then stick in more to isolate the problem.

[Joseph Tulowiecki]

was an endless while loop in another method. I thought it wasnt in another method but i was wrong. narrowed it down with a million system.out.println's thanks all !!