使用确定对话框来控制循环

import javax.swing.JOptionPane;
public class SentinelValueUsingConfirmationDialog {
public static void main(String [] args)
{
int sum=0;
int option=JOptionPane.YES_OPTION;
while(option==JOptionPane.YES_OPTION)
{
String dataString = JOptionPane.showInputDialog("Enter an int value:");
int data=Integer.parseInt(dataString);
sum+=data;
option=JOptionPane.showConfirmDialog(null,"Continue?");
}
JOptionPane.showMessageDialog(null,"The sum is "+sum);
}
}