private void BtambahActionPerformed(java.awt.event.ActionEvent evt) {

        jumlah = Integer.parseInt(Tjumlah.getText());
        harga = Integer.parseInt(Tharga.getText());
        diskon = Double.parseDouble(Tdiskon.getText());

        x = jumlah * harga;
        dis = (x * diskon)/100;
        total = x - dis;
        uang = total + Double.parseDouble(Ttotal.getText());
        Ttotal.setText(String.valueOf(uang));

        Struk.append(Tnama.getText() + "         ");
        Struk.append(String.valueOf(Tjumlah.getText() + "     "));
        Struk.append(String.valueOf(Tharga.getText() + "     "));
        Struk.append(String.valueOf(dis) + "    ");
        Struk.append(String.valueOf(total));
        Struk.append("\n");

        //Agar Nama, Jumlah, Harga dan Diskon menjadi kosong
        Tnama.setText("");
        Tjumlah.setText("");
        Tharga.setText("");
        Tdiskon.setText("0");
    }