JFreechart LookUpPaintScale颜色渐变

Question

如何在JFreechart中为LookUpPaintScale添加颜色渐变（3种颜色：红色、黄色、绿色）？感谢

Answer 1

我试着用新的GradientPaint初始化它，但这只需要2种颜色。

你可以试试LinearGradientPaint。

Answer 2

您可以尝试类似的东西

....
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);
....