Newbie question - Drawing objects in applet

[sheephead86]

Hi,
I'm pretty new to java, and I have a small problem involving drawing a rectangle on a java applet.Firstly this is not a plea for someone to help me with this peice of work, I just need pointing in the right direction.

Ok the problem.

I am creating a program that ask the user to input a height value, the program will then do a calculation and create a golden ratio width. The type of both the height and the width are double.

This is where the problem starts. The next thing I need to do is make the program draw the rectangle using the user inputted height and the calculated width.

I have a feeling that the problem has occured because I haven't converted the type double into a int type.
Here is my code

 
import java.awt.*;
import javax.swing.*;
import java.applet.Applet;
import java.awt.Graphics;
 
/**
 * Class Test - write a description of the class here
 * 
 * @author (your name) 
 * @version (a version number)
 */
public class Test extends JApplet
{
    // instance variables - replace the example below with your own
   double sum;
   int height;
   int width;
 
     /**
     * Called by the browser or applet viewer to inform this JApplet that it
     * has been loaded into the system. It is always called before the first 
     * time that the start method is called.
     */
    public void init()
    {
        String firstNumber;
        double number1, sum1;
 
        firstNumber = JOptionPane.showInputDialog("Please enter the height" );
 
 
        number1 = Double.parseDouble( firstNumber );
 
 
        sum1 = (Math.sqrt(5) + 1) / 2;
        sum = number1 * sum1;
 
        int height = (int)number1;
        int width = (int)sum;
 
 
 
 
        // this is a workaround for a security conflict with some browsers
        // including some versions of Netscape & Internet Explorer which do 
        // not allow access to the AWT system event queue which JApplets do 
        // on startup to check access. May not be necessary with your browser. 
        JRootPane rootPane = this.getRootPane();    
        rootPane.putClientProperty("defeatSystemEventQueueCheck", Boolean.TRUE);
 
        // provide any initialisation necessary for your JApplet
    }
 
    /**
     * Called by the browser or applet viewer to inform this JApplet that it 
     * should start its execution. It is called after the init method and 
     * each time the JApplet is revisited in a Web page. 
     */
    public void start()
    {
        // provide any code requred to run each time 
        // web page is visited
    }
 
    /** 
     * Called by the browser or applet viewer to inform this JApplet that
     * it should stop its execution. It is called when the Web page that
     * contains this JApplet has been replaced by another page, and also
     * just before the JApplet is to be destroyed. 
     */
    public void stop()
    {
        // provide any code that needs to be run when page
        // is replaced by another page or before JApplet is destroyed 
    }
 
    /**
     * Paint method for applet.
     * 
     * @param  g   the Graphics object for this applet
     */
    public void paint(Graphics g)
    {
        // simple text displayed on applet
        g.drawRect( 15, 10, 270, 20 );
        g.drawString("The sum is " + sum, 25, 25 );
        g.drawRect( 100, 100, height, width);
 
 
    }
 
    /**
     * Called by the browser or applet viewer to inform this JApplet that it
     * is being reclaimed and that it should destroy any resources that it
     * has allocated. The stop method will always be called before destroy. 
     */
    public void destroy()
    {
        // provide code to be run when JApplet is about to be destroyed.
    }
 
 
    /**
     * Returns information about this applet. 
     * An applet should override this method to return a String containing 
     * information about the author, version, and copyright of the JApplet.
     *
     * @return a String representation of information about this JApplet
     */
    public String getAppletInfo()
    {
        // provide information about the applet
        return "Title:   \nAuthor:   \nA simple applet example description. ";
    }
 
 
    /**
     * Returns parameter information about this JApplet. 
     * Returns information about the parameters than are understood by this JApplet.
     * An applet should override this method to return an array of Strings 
     * describing these parameters. 
     * Each element of the array should be a set of three Strings containing 
     * the name, the type, and a description.
     *
     * @return a String[] representation of parameter information about this JApplet
     */
    public String[][] getParameterInfo()
    {
        // provide parameter information about the applet
        String paramInfo[][] = {
                 {"firstParameter",    "1-10",    "description of first parameter"},
                 {"status", "boolean", "description of second parameter"},
                 {"images",   "url",     "description of third parameter"}
        };
        return paramInfo;
    }
}
 
 
 

Thanks for any suggestions.

[Nepomuk]

...This is where the problem starts. The next thing I need to do is make the program draw the rectangle using the user inputted height and the calculated width.

I have a feeling that the problem has occured because I haven't converted the type double into a int type...

First of all, welcome to TSDN!
About your problem: What DOES happen? And if you think, the problem has happened, because of the missing conversion, have you tried converting it?

Greetings,
Nepomuk