parseInt

[trefoil]

hi i need some guidance on this coding...

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.

[Fubarable]

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.

[trefoil]

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

[trefoil]

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

thanks for viewing.

[r035198x]

So you are no longer drawing anything?