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Plot a graph!!!

Posted on 2000-04-13
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Last Modified: 2008-03-06
Hello,

I am a beginner in using Java to write an applet.

Now I need to read data from a SQL server and then plot a graph by using the data from the server.

Is there any good exmaple existed which can download from the web?

Furthermore, if I have used the Perl script to read data from SQL server, can I pass the data to the Java Program??? if yes, how can I do this?

Thank you for your opinion?

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Question by:cplau
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Accepted Solution

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bava_anand earned 240 total points
ID: 2712967
It's very easy.

In the question u have mentioned himself had the solution.

The only thing is you have to be good or concentrate in writing applet with the knowledge of the methods involved in Graphics.

1) The first thing u have to do is to construte the Applet tag dynamically (Using Perl Script or ASP) with the java class file name( your java program) and the various data needed for ploting the graph placed in the Parameter tag.

like below

<html>
<body>
<applet  CODE="Graph.class" Width="500" Height="150">
<param name=GraphData value="OGL,12.45,14.34,16.854,18.23,20.234,18.233,16.234,14.23,12.34,^
       SDBC,8.45,9.34,10.854,11.23,12.234,11.233,10.234,9.23,8.34,^
       BM,6.45,7.34,8.854,9.23,10.234,9.233,8.234,7.23,6.34,^">
</applet>
</body>

2) The next thing is writing the Graph.java program that reads the data from the parameter provided in the applet tag and plots the graph according
to your spec without any flicker problem by using drawimage instead of paint.

Str = getParameter("GraphData")

I think this will solve your problem.
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