Manually Sort an ArrayList in Java

Just like to paste this code:

        List sorted = new ArrayList();
        RackPosition temp = null;
        int remove_index = -1;

        while(original.size() > 0) {    
            temp = original.get(0);
            for (int i = 0; i < original.size(); i++ ) {
                RackPosition rp2 = original.get(i);
                if(temp.getPositionNumber().compareTo(rp2.getPositionNumber()) > 0) {
                    temp = rp2;
                    remove_index = i;
                }
            }
            System.out.println("Adding " + temp.getPositionNumber());
            sorted.add(temp);
//          original.remove(temp);
            if(remove_index >= 0) {
                original.remove(remove_index);
            }
            remove_index = 0;
        }