public class priceCalculator {
    public static void main(String[] args) {
        System.out.println("Welcome to the price calculator.");
        System.out.println();

        double subtotal = 49.50;
        double tax = 0.09;
        double taxTotal = subtotal * tax;
        double grandTotal = taxTotal + subtotal;
        double displayTax = tax * 100;;

        System.out.println("The subtotal is " + subtotal);
        System.out.println("The tax is " + displayTax + "%");
        System.out.println("The grand total is " + grandTotal);
        System.out.println("Thank you for using the price calculator.");
    }
}
and heres some other bs:
import java.awt.Color;
import javax.swing.JFrame;
import javax.swing.JTextField;
public class FrameTester {
    public static void main(String[] args) {
        JFrame frame = new JFrame();
        frame.setSize(200, 200);
        JTextField text = new JTextField("Hello, World!");
        text.setBackground(Color.PINK);
        frame.add(text);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setVisible(true);
    }
}