Parameters to Applets: extensibility

Big Picture:

Parameters to applets free you from recompilation and make your applets more flexible.

Howto:

• <PARAM> tags:

  <PARAM NAME="lambda" VALUE=".5">
  

• Parameter parsing in init() of Applet with getParameter():

  public class myApplet extends java.applet.Applet {
    ...
  
    public void init() {
      ...
  
      String l = getParameter("lambda");
  
      double lambda = Double.valueOf(l).doubleValue();
  
      // or, equivalently,
  
      double Lambda = Double.valueOf(getParameter("lambda")).doubleValue();
  
      ...
    }
  }
  

• Use integral type classes (Double, Integer, Boolean, etc.) to convert a String (from getParameter) into that type (double, int, boolean, etc.)