parseInt

hi i need some guidance on this coding...

Code:

---

package q2;

import java.applet.Applet;
import java.awt.*;
import javax.swing.JOptionPane;


//import javax.swing.JFrame;


public class DrawObjects extends Applet {

    public void init() {
      setSize(400,200);
      setBackground( Color.black );
    }
    public void paint(Graphics g) {
        g.setColor(Color.green);
            //Object[] possibleValues = { "1", "2", "3" };
            //Object selectedValue = JOptionPane.showInputDialog(null, "Choose one", "Input", JOptionPane.INFORMATION_MESSAGE, null, possibleValues, possibleValues[0]);
   

String inp = JOptionPane.showInputDialog(null, "Enter 1 to draw lines\nEnter 2 to draw rectangles\nEnter 3 to draw circles","Draw Objects", JOptionPane.CANCEL_OPTION);
int num = Integer.parseInt(inp);

if (num != int)
{
    JOptionPane.showMessageDialog(null, "Please enter a valid number\nPlease try again", "Invalid number!", JOptionPane.ERROR_MESSAGE);
}
else
{


          switch (num) {
               
                case 1: {
                    for(int i = 1; i <=20; i++){
                    g.drawLine(10, 10, 400, (10*i));
                    }
                }break;
                case 2: {
                    for(int i = 1; i <=20; i++){
                    g.drawRect(10*i, 10*i, 10*i+40, 10*i+40);
                    }
                }break;
                    case 3: {
                    for(int i = 1; i <=20; i++){
                    g.drawOval(10*i, 10*i, 10*i+40, 10*i+40);
                    }
                }break;
                    default: {
                    JOptionPane.showMessageDialog(null, "You have entered an Invalid number\nPlease try again", "Invalid number!", JOptionPane.ERROR_MESSAGE);
                      //JOptionPane.showMessageDialog(null, "Thank You");
                      //System.exit(0);
                    break;
                //System.out.println("Invalid value.");
               
                 

                    }
            } JOptionPane.showMessageDialog(null, "Thank You");

}
    }

            }

---

First of all, I am trying to dissappear the JOptionPane.showInputDialog but it keeps looping twice.

2ndly, I am wondering how do i put if (inp != int) the int, is there other term to put it as numbers or anyother than numbers.

Thanks and appreciate in advance.

Oh my. You appear to be calling your methods from within the applet's paint method which is a big no-no as the paint method is just for painting. I advise you to go through the Sun applet tutorial to learn how their supposed to be coded.

Also, if you want the user to "go again" you'll need to use a loop of some sort, perhaps a while loop or a do/while loop.

oh, this is just a switch case tutorial to do.
is there a shorter way to this?

dear debuggers, i have managed to solve this by declaring strings and integer in the class instead in graphics object.

thanks for viewing.

So you are no longer drawing anything?