• What is JFDraw?
• Who will use JFDraw?
• Which OS that JFDraw supports?
• Is JFDraw completely free?
• What about a jfdraw.jar file?
• What about a jfdraw.jnlp file?
• How can I run JFDraw?
• Can I release an online web start JFDraw like you have done?

  Developers

  JFDraw Web Start Solution

  JFDraw Applet Solution

  General

• By double click jfdraw.jar in your file system, if you have installed JDK/JRE in your machine.
• Run command below under console prompt mode:
   
  Prompt> java -jar jfdraw.jar
   
• Web start JFDraw online. If you have installed Java Web Start(Java Web Start is included in JDK/JRE 1.4.x or above), just enter url below in your browser to web start JFDraw.
  http://www.jfimagine.com/download/jfdraw.jnlp

• You need a jnlp file, such as a jfdraw.jnlp at jfimagine.com website,then modify some content of jfdraw.jnlp,please notice that a jnlp file is just an Unicode text file.
   
• You need a small startup jpg or gif image , so you can get an image icon when your Java Web Start tool startup,
   
• You would have ability to add a new JNLP mime type(application/x-java-jnlp-file) into your web server, or you can ask your ISP's permission to do that,
   
• You do need a jfdraw.jar file, sure you can download it simply from jfimagine.com website.
   

  Developers

  JFDraw Web Start Solution

• One method is to use a static link, such as the Static Demo has done, When you press "Launch It" there would be a hyper-link such as http://www.jfimagine.com/webstart/webstart.jsp?fileName=http://www
  .jfimagine.com/webstart/mechanical.jfd under "Launch it". The background routine,http://www.jfimagine
  .com/webStart, is a very simple routine that is used to generate a dynamic JNLP http response with the file name parameter included, so the client machine can get a reference of the file name(http://www.jfimagine.com/webstart/mechanical.jfd) as soon as JFDraw startup.
   
• The second method, as you know at the Dynamic Demo is almost a same solution as the static demo above. It uses a html form to dynamically pass the four text boxes' value,fileName,fileName2, fileName3 and fileName4 to the http://www.jfimagine.com/webstart/webstart.jsp routine, then dynamically generate a JNLP http response to tell the client machine to download and start JFDraw application, and load the four files(fileName,fileName2,fileName3 and fileName4) if specified.
   

• First of all, download the jfdraw_webstart.jar file to your local machine,
   
• then under command prompt box, go to the directory the file jfdraw_webstart.jar located, type the command below:
  
  java -jar jfdraw_webstart.jar http://www.jfimagine.com/webstart/datagram.jfd
  
  The command above would run JFDraw in your local machine, and concurrently load the JFD file at http://www.jfimagine.com/webstart/datagram.jfd.

• codebase="http://www.jfimagine.com/webstart", you can change this codebase directory to another url in your own web server. you need to place the two files, jfdraw_webstart.jar and jfimagine.small.jpg under this directory.
  Note: the code base, http://www.jfimagine.com/webstart is just a directory, not the routine name webStart, they're different.
   
• You can write such a webStart routine use your own web languages,when you start to generate such a jnlp text http response, notice to set the header content type of http response as "application/x-java-jnlp-file". and the encode type of http response would be 'UTF-8'.
  and, you'd better to the set the http header expires immediately, or please always set a new date-time for the response.So the browser will be forced to fetch jnlp content each time.
  
  In jsp/servlet, the setup for response would like below:
  
  response.setContentType("application/x-java-jnlp-file");
  response.setHeader("Expires", "0");
  response.addDateHeader("Date", java.util.Calendar.getInstance().getTime().getTime());
  response.addDateHeader("Last-Modified", java.util.Calendar.getInstance().getTime().getTime());
  
   
• The arguments in JNLP. such as:
  
  <argument>http://www.jfimagine.com/webstart/mechanical.jfd</argument>
  <argument>http://www.jfimagine.com/webstart/datagram.jfd</argument>
  
  These arguments are the file names you transfer from web pages to JFDraw, now it would be re-packaged between <argument></argument> elements, each file name would occupy one line of <argument></argument> pair.
   
• by the way, a local file path(the file will be in client local machine), or an UNC file path (the file will be in local network)are also supported by JFDraw, you can try to package such a file name in <argument> element pair. But notice that only specified local machine can access such files in JFDraw.
   
• Never forget to add a new JNLP mime type(application/x-java-jnlp-file) into your web server and restart web server before you doing these all above.
   

• Right-click server computer in left pane, then select Properties from the drop-down menu.
   
• In the 'Computer MIME Map' click the Edit button.
   
• The File Types window is displayed. Click New Type.
   
• In the File Type box, enter the following in the Associated Extension edit box: jnlp
   
• In the Content Type (MIME) box, enter: application/x-java-jnlp-file
   
• Click Ok to close the File Type box. Click Ok again to close the File Types Window. Click Ok in the Server properties window to save the changes.
   
• Restart the IIS Admin Service.
   

• Maybe your proxy settings has something wrong, use the java web start manager to set correctly proxy settings.
   
• Old Java web start may not support NTLM authentification in microsoft proxy, we recommend you to use web start within JDK/JRE 1.4.2(or above), or you can use "proxy ntlm", a little software written in python, to pass NTLM authentification.

  JFDraw Applet Solution  Back to top

<applet code="JFDrawApplet.class"
width="600" height="450"
archive="jfdraw_applet.jar">
</applet>

<applet code="JFDrawApplet.class"
width="600" height="450"
archive="jfdraw_para.jar">
<param name=file1 value="http://www.jfimagine.com/webstart/datagram.jfd">
</applet>

<applet code="JFDrawApplet.class"
width="600" height="450"
archive="jfdraw_para.jar">
<param name=file1 value="<%=request.getParameter("file1")%>">
</applet>