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Applet or Servlet

There are several factors to consider when choosing whether to implement either the applet or servlet version of the graph. The table below highlights some of the most important points to be taken into account.

Implementation Type Advantages Disadvantages
  • Graph can be inserted in dynamic HTML with the IMG tag.
  • Provides ability for direct database access
  • Requires a Servlet Engine to be running on the web server.
  • Easy to install and modify.
  • Interactive Graph functionality (eg. display pop-up values on mouse over, execute URL & JavaScript on mouse click.)
  • Does not require any custom modifications to the server.
  • The small size of the JAR files provide quick applet load times (only 15kb).
  • Some browsers do not print applets.


As you can see from the table above the big advantage of the Applet are the interactive features and the big advantage of the Servlet is the ability to print the graph image consistently across all browser versions. If both these factors are important to your implementation then a combination of the two may be the answer. For an outline of this solution please see the section "Graph Printing" or click here.

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Common Problems
This section describes and provides solutions to common problems.

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