override CategoryPlot.getLegendItems

[cris-rj]

I created a subclass of CategoryPlot because I needed to override the getLegendItems method. I want to edit the legends items.
here is my code:

Code: Select all

public class LegendCategoryPlot extends CategoryPlot{

	public LegendItemCollection getLegendItems(Paint[] paint){
		System.out.println("teste");
		LegendItemCollection lc = new LegendItemCollection();
		LegendItem li1 = new LegendItem("item1",paint[1]);
		LegendItem li2 = new LegendItem("item2",paint[2]);
		LegendItem li3 = new LegendItem("item3",paint[4]);
		lc.add(li1);
		lc.add(li2);
		lc.add(li3);
		return lc;
	}

}

my problem is that when I get the plot from chart and put it in the variable
of type that I create.

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 LegendCategoryPlot plot = (LegendCategoryPlot)chart.getCategoryPlot()
or 
 LegendCategoryPlot plot = (LegendCategoryPlot)chart.getPlot()

both of lines compiles but raise runtime errors.

does anybody have an idea?
thanks .