import java.util.*;import javax.swing.JOptionPane;public class Exercise7_15 {    /**Main method*/    public static void main(String[] args) {        // Receive the amount entered from the dialog box        String s = JOptionPane.showInputDialog(        "Enter numbers separated by spaces:");                Scanner scanner = new Scanner(s);                double sum = 0;        while (scanner.hasNext())            sum += scanner.nextDouble();                System.out.println("Sum is " + sum);                        System.exit(0);    }}