payroll Dialog

package lessons;
import javax.swing.JOptionPane;
public class PayrollDialog
{
//ask for name, hours worked, and payrate, then greets them withtheir name and gross pay
	public static void main(String[] args)
	{
		String name, hour, rate;
		double hours, rates, gross;
		name = JOptionPane.showInputDialog("hello, whats your name?");
		hour = JOptionPane.showInputDialog("how many hours have you worked?");
		hours = Double.parseDouble(hour);
		rate = JOptionPane.showInputDialog("whats your pay rate?");
		rates = Double.parseDouble(rate);
		gross = rates*hours;
		JOptionPane.showMessageDialog(null,  "greetings "+name+", youve made $"+gross);
		System.exit(0);

	}

}