model.Grafico.java Source code

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Here is the source code for model.Grafico.java

Source

/*
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package model;

import java.io.FileOutputStream;
import java.io.OutputStream;
import java.util.List;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartUtilities;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.ValueAxis;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.plot.XYPlot;
import org.jfree.data.category.DefaultCategoryDataset;

/**
 *
 * @author aluno
 */
public class Grafico {
    String grafico;

    public void geraGrafico(List<Moeda> listamoedas) {
        DefaultCategoryDataset ds = new DefaultCategoryDataset();
        if (listamoedas == null) {
            return;
        }
        for (int i = 0; i < listamoedas.size(); i++) {
            ds.addValue(listamoedas.get(i).getPrecocompra(), "Preo de Compra", listamoedas.get(i).DatatoString());
            ds.addValue(listamoedas.get(i).getPrecovenda(), "Preo de Venda", listamoedas.get(i).DatatoString());

        }
        JFreeChart grafico = ChartFactory.createLineChart("Variaes da Moeda", "Dia", "Valor", ds,
                PlotOrientation.VERTICAL, true, true, false);
        //XYPlot plot = grafico.getXYPlot();    
        //ValueAxis yAxis = plot.getRangeAxis();
        //yAxis.setRange(3, 3.5);
        try {
            OutputStream arquivo = new FileOutputStream("grafico.png");
            ChartUtilities.writeChartAsPNG(arquivo, grafico, 550, 400);
            arquivo.close();
        } catch (Exception e) {
            System.out.println("ERRO");
        }
    }
}