Alexa Top Rankers written in Java ?

Programmer Question

What all Alexa top websites are written in Java, if any?

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Problem with a chart with a polyline and a LinearGradientBrush

Programmer Question

I have a graph with a polyline contained into a canvas. I would like to set the stroke of the polyline starting from a color at the bottom and ending to another color on top. I tried with this xaml:

<Polyline StrokeThickness="2">
  <Polyline.Stroke>
    <LinearGradientBrush StartPoint="0.5,1" EndPoint="0.5,0">
      <GradientStop Color="Blue"  Offset="0" />
      <GradientStop Color="Cyan" Offset="1" />
    </LinearGradientBrush>
  </Polyline.Stroke>
</Polyline>

In this way it works but the height of the gradient is equal to the height of the polyline. I mean, if I have a polyline which goes from the bottom of the canvas to its top, the gradient is applied over the entire height of the canvas. If I have instead a horizontal polyline, the gradient is applied to its thickness.

I would like to have a gradient height equal to the canvas height, independently from the polyline height.

How can I achieve this?

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How can two programs talk to each other in Java?

Programmer Question

I want to ‪reduce‬ the CPU usage/ROM usage/RAM usage - generally‬, all system resources that my app uses - who doesn't? :)

For this reason I want to split the preferences window from the rest of the application,
and let the preferences window to run as ‪independent‬ program.

The preferences program ‪should‬ write to a Property file(not a problem at all) and to send a "update signal" to the main program - which means it should call the update method (that i wrote) that found in the Main class.

How can I call the update method in the Main program from the preferences program?

To put it another way, is a way to build preferences window that take system resources just when the window appears?

Is this approach - of separating programs and let them talk to each other (somehow) - the right approach for speeding up my programs?

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