if (a.contentEquals("HONDA") && b.contentEquals("BEAT") && c.contentEquals("Beat POP CBS")) {

        switch (d.getSelectedItem().toString()) {
            case "2010":
                hasil.setText("Rp. 8.000.000");
                break;

            case "2011":
                hasil.setText("Rp. 9.000.000");
                break;

            case "2012":
                hasil.setText("Rp. 10.000.000");
                break;

            default:
                break;
        }
}