Arcade Village Blog

To retrieve the parameters, the Applet object has a function called getParameter.

In the case of Hebi, the HTML code is as follows:

<APPLET CODE="Hebi.class" MAYSCRIPT ARCHIVE="hebi.jar" WIDTH="308" HEIGHT="350">

<param name="il" value="1">

<param name="ig" value="1">

<param name="bg" value="ffce63">

<param name="ink" value="000000">

The parameters provided are:
- it : code of the language used (ArcadeVillage "speaks" English, French and Japanese)
- ig : a code for the game
- bg : the background color
- ink : the color of the ink.

In the first article, we saw in Hebi's code the following lines:

String s = getParameter("bg");

if ( s != null )

{

try

{

c = new Color( Integer.parseInt(s,16) );

}

catch( Exception e )

{

}

}

s = getParameter("ink");

if ( s != null )

{

try

{

ink = new Color( Integer.parseInt(s,16) );

}

catch( Exception e )

{

}

An application is not linked to a html page, I decided to use the class Properties which offers the ease of being able to be loaded from an XML file.
The model of the XML file is as follows:

<?xml version="1.0" encoding="UTF-8" standalone="no"?>

<!DOCTYPE properties SYSTEM "http://java.sun.com/dtd/properties.dtd">

<properties>

<entry key="url.documentbase">games/hebi/</entry>

<entry key="applet.width">310</entry>

<entry key="applet.height">360</entry>

<entry key="il">2</entry>

<entry key="ig">1</entry>

<entry key="fl">1</entry>

<entry key="bg">ffce63</entry>

<entry key="ink">000000</entry>

</properties>

This format is recognized by the Properties class that I use to retrieve the parameter values.
My Applet class will contain the code :

public class CCApplet extends Panel

{

 private Properties params = new Properties();

 ..



 public String getParameter( String key )

  {

	return params.getProperty(key);

		

  }

 public void setParameter( String key, String value )

 {

	params.setProperty(key,value);		

	

 }



 public void loadParamsFromXML( String appfile )

  {

   InputStream f = null;

   try 

    {

     f = new FileInputStream(appfile);

      // load a properties file

     params.loadFromXML(f);

     f.close();

    } 

  catch (Exception ex) 

    {

     ex.printStackTrace();

    }

}

The application must contain a call to the loadParamsFromXML function at the beginning of the program to load the parameters.

Now, the getParameter function return the same values ​​as if we were in an applet called from an HTML page.
The smartest of you will have noted the following lines in the XML file:

<entry key="url.documentbase">games/hebi/</entry>
<entry key="applet.width">310</entry>
<entry key="applet.height">360</entry>

I'm also using this file to simulate the getDocumentBase() function.
The implementation of this one, as well as getCodeBase(), will be explained in the next article.