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How can I check if a value exists in an ArrayList ? List<CurrentAccount> lista = new ArrayList<CurrentAccount>(); CurrentAccount conta1 = new CurrentAccount("Alberto Carlos", 1052); CurrentAccount conta2 = new CurrentAccount("Pedro Fonseca", 30); CurrentAccount conta3 = new CurrentAccount("Ricardo Vitor", 1534); CurrentAccount conta4 = new CurrentAccount("João Lopes", 3135); lista.add(conta1); lista.add(conta2); lista.add(conta3); lista.add(conta4); Collections.sort(lista); System.out.printf("Bank Accounts:" + "%n"); Iterator<CurrentAccount> itr = lista.iterator(); while (itr.hasNext()) { CurrentAccount element = itr.next(); System.out.printf(element + " " + "%n"); } System.out.println();
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