Currently, when you invoke the CC, e.g., for Math.abs() method argument,

    public int sample() {
        int a1field = -4;
        int a2field = 5;
        return Math.abs(a1field);
    }

 and you select another field, e.g. "a2field", the old variable isn't replaced
by the new one, instead, it is inserted, e.g. :

    public int sample() {
        int a1field = -4;
        int a2field = 5;
        return Math.abs(a2field1field);
    }

Other IDEs automaticaly replace the old value by the new one - selected from CC.

See also the pictures.