JOption box wont go away

Question

I read input from aninputdialog box inside a loop which is in a constructor for a simple graphical clock face program
the clock is displayed in the applet, but the dialog box doesn't go away, therre is no main method for an applet, so where do i put the system.exit() or whatever so that the boxes dissappear??
also
is this sort of topic too newbie for this site??

Answer 1

I cant really shorten it much and i understand if Its too much to help with
thanks
<applet code="ClockApplet.class" width="1000" height="1000" ></applet>
import java.awt.Graphics;
import java.awt.Graphics2D;
import javax.swing.JApplet;
  Draws a clock
public class ClockApplet extends JApplet
     public void paint(Graphics g)
          Graphics2D g2 = (Graphics2D) g;
          Clock clockFace = new Clock(150, 150, 400);
          clockFace.draw(g2);
      a clock face with a minute and an hour hand
     Time is specified by the user
import javax.swing.JOptionPane;
import java.awt.geom.Ellipse2D;
import java.awt.geom.Line2D;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.geom.Point2D;
public class Clock
     private double xLeft;
     private double yTop;
     private double size;
     private double hr;
     private double min;
          constructs a clock face starting at coordinate(x, y)
          and with a given size(diameter)
          @param the x coordinate of the starting point of the circle
          @param the y coordinate of the starting point of the circle
          @param the diameter of circle
     public Clock(double x, double y, double size)
          boolean validTime = false;
          xLeft = x;
          yTop = y;
          this.size = size;
          while(!validTime)
               validTime = true;
               String input = JOptionPane.showInputDialog("enter the time ie.(5:30) : ");
               if(input.length() != 5 && input.length() !=4)
                    validTime = false;
               if(validTime)
                    //checks to see if there is a colon in the right place
                    String colonString = input.substring(input.length() - 3, input.length() - 2);
                    if((colonString.equals(":") == false))
                         validTime = false;
               if(validTime)
                    String[] time = input.split(":");
                    hr = Double.parseDouble(time[0]);
                    min = Double.parseDouble(time[1]);
                    if(min >= 60 || min < 0 || hr > 12 || hr < 1)
                         validTime = false;
               if(!validTime)
                    JOptionPane.showMessageDialog(null, "Invalid time", "ATTENTION",
                                                  JOptionPane.INFORMATION_MESSAGE);
          draws the clock face with an hour and a minute hand
          @param Graphics2D g2
     public void draw(Graphics2D g2)
          Ellipse2D.Double circle = new Ellipse2D.Double(xLeft, yTop, size, size);
          Point2D.Double p1 = new Point2D.Double((xLeft+ size/2), (yTop + size/2));
          Line2D.Double hourHand = new Line2D.Double(p1, getHourHandCoordinate(p1));
          Line2D.Double minuteHand = new Line2D.Double(p1, getMinuteHandCoordinate(p1));
          g2.draw(circle);
          g2.draw(hourHand);
          g2.draw(minuteHand);
          returns the end point of the hour hand
          @param Point2D.Double the middle of the clock face
          @return Point2D.Double end point of the hour hand line
     public Point2D.Double getHourHandCoordinate(Point2D.Double p1)
          //centre coordinates of the clock face
          double xCentre = p1.getX();
          double yCentre = p1.getY();
          //here i make the fraction smaller so that the end points will be closer to the centre
          double smallerSize = size/2;
          //amount x, and y axies change with each minute difference
          final double INCREMENT = smallerSize/30.0;
          //fraction of an hour more that the hand needs to move
          //amount x, and y axis change with each second difference
          double fraction;
          if(min!=0)
               fraction = min/60;
          else fraction = 0;
          //x and y of the end point of the hour hand
          double x = 0, y = 0;
          //calculates end point depending on the hour entered and the minute entered
          if(hr <= 3)
               x = xCentre + 5 * (hr + fraction) * INCREMENT;
               y = yCentre - 5 * (3 - hr - fraction) * INCREMENT;
          else if(hr <= 6)
               x = xCentre + 5 * ( 6 - hr - fraction) * INCREMENT;
               y = yCentre + 5 * (hr - 3 + fraction) * INCREMENT;
          else if(hr <=9)
               x = xCentre - 5 * (hr - 6 - fraction) * INCREMENT;
               y = yCentre + 5 * (9 - hr - fraction) * INCREMENT;
          else if(hr < 12)
               x = xCentre - 5 * (12 - hr + fraction) * INCREMENT;
               y = yCentre - 5 * (hr - 9 - fraction) * INCREMENT;
          else
               x = xCentre + 5*fraction * INCREMENT;
               y = yCentre - 5*( 2 + 1 - fraction) * INCREMENT;
          //creates a point object and returns it
          Point2D.Double p2 = new Point2D.Double(x, y);
          return p2;
          returns the end point of the minute hand
          @param Point2D.Double centre of clock face
          @return Point2D.Double end point of the minute hand line
     public Point2D.Double getMinuteHandCoordinate(Point2D.Double p1)
          //amount x, and y axis change with each second difference
          final double INCREMENT = size/30.0;
          //centre coordinates of the clock face
          double xCentre = p1.getX();
          double yCentre = p1.getY();
          double x = 0, y = 0;
          //calculates the end point depending on how many minutes were entered
          if(min <= 15)
               x = xCentre + min*INCREMENT;
               y = yCentre - (15 - min)*INCREMENT;
          else if(min <= 30)
               x = xCentre + (30 - min)*INCREMENT;
               y = yCentre + (min - 15)*INCREMENT;
          else if(min <= 45)
               x = xCentre - (min - 30)*INCREMENT;
               y = yCentre + (45 - min)*INCREMENT;
          else
               x = xCentre - (60 - min)*INCREMENT;
               y = yCentre - (min - 45)*INCREMENT;
          //creates a point object, and returns it
          Point2D.Double p3 = new  Point2D.Double(x, y);
          return p3;
}Edited by: rubiconTwist on May 27, 2008 4:34 AM