Invert bits in an integer in Java

What is the best way to invert a bit of a whole number in Java? I have tried it in the following way, although it seems inelegant to me:

    int entero = 4+2+1;

    if ((entero & 4) == 4)
        entero -= 4; 
    else
        entero += 4;

    System.out.println ("Entero con el bit 3 invertido: " + entero);