JFreechart LookUpPaintScale color gradient

How do you ad开发者_StackOverflow社区d a color gradient (3 colors: red, yellow, Green) to a LookUpPaintScale in JFreechart? Thanks

I tried initializing it with the new GradientPaint, but this only take 2 colors.

You could try LinearGradientPaint.

you can try something like this

....

XYPlot plot = new XYPlot(data1, xAxis, yAxis, null);

    LookupPaintScale ps = new LookupPaintScale(0,101,Color.lightGray);
    ps.add(0, Color.green);
    ps.add(10, Color.yellow);
    ps.add(20, Color.red);

    renderer1.setBlockHeight(0.95f);
    renderer1.setBlockWidth(0.95f);

    renderer1.setPaintScale(ps);
    plot.setRenderer(renderer1);

....