I Need Help with this Code

Question

Hello, I need help with this code. I had to cut a lot of it out due to max character's I'm allowed to used but this is the gist of it (it's a GUI):

        java.awt.EventQueue.invokeLater(new Runnable() {
            public static void main(String args[]) {
        double nut1;
        double nut2;
        double nut3;
        double nut4;
        double nut5;
        double taxes;
        double subtotal;
        double grandtotal;
        char money;
        
        money = '$';
        
        nut1 = money + 2.50 * Double.parseDouble(txtnuts1.getText());
        nut2 = money + 1.50 * Double.parseDouble(txtnuts1.getText());
        nut3 = money + 3.00 * Double.parseDouble(txtnuts3.getText());
        nut4 = money + 1.50 * Double.parseDouble(txtnuts1.getText());
        nut5 = money + 1.50 * Double.parseDouble(txtnuts1.getText());
        
        subtotal = money + nut1 + nut2 + nut3 + nut4+ nut5;
        subtotal = subtotal *100;
        subtotal = Math.round (subtotal);
        subtotal = subtotal/100;
        
        lbltxttotal7.setText(String.valueOf(txttotal7));
        
        taxes = money + subtotal * 0.13;
        
        taxes = taxes *100;
        taxes = Math.round (taxes);
        taxes = taxes/100;
        
        lbltxtTotal6.setText(String.valueOf(txtTotal6));
        
        grandtotal = money + subtotal + taxes;
        grandtotal = grandtotal *100;
        grandtotal = Math.round (grandtotal);
        grandtotal = grandtotal/100;
        
        lbltxtTotal8.setText(String.valueOf(txtTotal8));

Answer 1

java.awt.EventQueue.invokeLater(new Runnable() {
    public void run() {
        try {
            
            double qty1 = Double.parseDouble(txtnuts1.getText());
            double qty2 = Double.parseDouble(txtnuts2.getText());
            double qty3 = Double.parseDouble(txtnuts3.getText());
            double qty4 = Double.parseDouble(txtnuts4.getText());
            double qty5 = Double.parseDouble(txtnuts5.getText());

           
            double nut1 = 2.50 * qty1;
            double nut2 = 1.50 * qty2;
            double nut3 = 3.00 * qty3;
            double nut4 = 1.50 * qty4;
            double nut5 = 1.50 * qty5;

            
            double subtotal = nut1 + nut2 + nut3 + nut4 + nut5;
            subtotal = Math.round(subtotal * 100.0) / 100.0;

            lbltxtTotal7.setText("$" + String.format("%.2f", subtotal));

            
            double taxes = subtotal * 0.13;
            taxes = Math.round(taxes * 100.0) / 100.0;

            lbltxtTotal6.setText("$" + String.format("%.2f", taxes));

            
            double grandtotal = subtotal + taxes;
            grandtotal = Math.round(grandtotal * 100.0) / 100.0;

            lbltxtTotal8.setText("$" + String.format("%.2f", grandtotal));

        } catch (NumberFormatException e) {
            JOptionPane.showMessageDialog(null, "Please enter valid numeric quantities.");
        }
    }
});

// i think this is right code