How to unsubscribe a texfield record from an ArrayList that comes from another Frame in Java?

public void bajaClientes(VerBajas panel) {    
    VerBajas b1 = new VerBajas();
    VerBajas b2 = new VerBajas();
    b1.getTxtbapel1();
    b2.getTxtbapel2();
    int n = 0;
    String desc = "NULL";
    ArrayList clientes = panel.getFrame().getClientesGuardados(); 
    Iterator itr = clientes.iterator();
     for(n = 0; n <= clientes.size(); n++) {
         if(clientes.isEmpty()) {
            System.out.println("No existen clientes");
         } else{
            //????
         }
     }
}