Amigos, preciso fazer um grafico no jfreechart e nao to conseguindo.
Um grafico de barras simples…sem novidade,… o problema é a legenda das series que precisaria ficar dentro da barra.
Olhem o exemplo em anexo… este foi feito no excel… alguem ja fez algum grafico com a legenda dentro da barra e pode me ajudar?
André,
As bibliotecas do JFreeChart tem todas as opções.
O exemplo abaixo faz parte do Demo que acompanha o JFreeChart e resolve o teu problema, o texto que deve ir na barra é colocado em string ja no inicio do codigo.
// row keys…
String series1 = “First”;
String series2 = “Second”;
String series3 = “Third”;
É óbvio que pode ser um array e alocado dinamicamente com algumas mudanças
Espero que ajude
package org.jfree.chart.demo;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.GradientPaint;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.CategoryAxis;
import org.jfree.chart.axis.CategoryLabelPositions;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.labels.ItemLabelAnchor;
import org.jfree.chart.labels.ItemLabelPosition;
import org.jfree.chart.labels.StandardCategoryItemLabelGenerator;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.plot.IntervalMarker;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.renderer.BarRenderer;
import org.jfree.data.CategoryDataset;
import org.jfree.data.DefaultCategoryDataset;
import org.jfree.text.TextUtilities;
import org.jfree.ui.ApplicationFrame;
import org.jfree.ui.Layer;
import org.jfree.ui.RectangleAnchor;
import org.jfree.ui.RefineryUtilities;
import org.jfree.ui.TextAnchor;
/**
* A simple demonstration application showing how to create a bar chart with a custom item
* label generator.
*
* @author David Gilbert
*/
public class BarChartDemo7 extends ApplicationFrame {
/**
* A custom label generator.
*/
static class LabelGenerator extends StandardCategoryItemLabelGenerator {
/**
* Generates an item label.
*
* @param dataset the dataset.
* @param series the series index.
* @param category the category index.
*
* @return the label.
*/
public String generateItemLabel(CategoryDataset dataset, int series, int category) {
return dataset.getRowKey(series).toString();
}
}
/**
* Creates a new demo instance.
*
* @param title the frame title.
*/
public BarChartDemo7(String title) {
super(title);
CategoryDataset dataset = createDataset();
JFreeChart chart = createChart(dataset);
ChartPanel chartPanel = new ChartPanel(chart);
chartPanel.setPreferredSize(new Dimension(500, 270));
setContentPane(chartPanel);
}
/**
* Returns a sample dataset.
*
* @return The dataset.
*/
private CategoryDataset createDataset() {
// row keys...
String series1 = "First";
String series2 = "Second";
String series3 = "Third";
// column keys...
String category1 = "Category 1";
String category2 = "Category 2";
String category3 = "Category 3";
String category4 = "Category 4";
String category5 = "Category 5";
// create the dataset...
DefaultCategoryDataset dataset = new DefaultCategoryDataset();
dataset.addValue(1.0, series1, category1);
dataset.addValue(4.0, series1, category2);
dataset.addValue(3.0, series1, category3);
dataset.addValue(5.0, series1, category4);
dataset.addValue(5.0, series1, category5);
dataset.addValue(5.0, series2, category1);
dataset.addValue(7.0, series2, category2);
dataset.addValue(6.0, series2, category3);
dataset.addValue(8.0, series2, category4);
dataset.addValue(4.0, series2, category5);
dataset.addValue(4.0, series3, category1);
dataset.addValue(3.0, series3, category2);
dataset.addValue(2.0, series3, category3);
dataset.addValue(3.0, series3, category4);
dataset.addValue(6.0, series3, category5);
return dataset;
}
/**
* Creates a sample chart.
*
* @param dataset the dataset.
*
* @return The chart.
*/
private JFreeChart createChart(CategoryDataset dataset) {
// create the chart...
JFreeChart chart = ChartFactory.createBarChart(
"Bar Chart Demo 7", // chart title
"Category", // domain axis label
"Value", // range axis label
dataset, // data
PlotOrientation.VERTICAL, // orientation
false, // include legend
true, // tooltips?
false // URLs?
);
// NOW DO SOME OPTIONAL CUSTOMISATION OF THE CHART...
// set the background color for the chart...
chart.setBackgroundPaint(Color.white);
// get a reference to the plot for further customisation...
CategoryPlot plot = chart.getCategoryPlot();
plot.setBackgroundPaint(Color.lightGray);
plot.setDomainGridlinePaint(Color.white);
plot.setRangeGridlinePaint(Color.white);
IntervalMarker target = new IntervalMarker(4.5, 7.5);
target.setLabel("Target Range");
target.setLabelFont(new Font("SansSerif", Font.ITALIC, 11));
target.setLabelAnchor(RectangleAnchor.LEFT);
target.setLabelTextAnchor(TextAnchor.CENTER_LEFT);
target.setPaint(new Color(222, 222, 255, 128));
plot.addRangeMarker(target, Layer.BACKGROUND);
// set the range axis to display integers only...
NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis();
rangeAxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());
// disable bar outlines...
BarRenderer renderer = (BarRenderer) plot.getRenderer();
renderer.setDrawBarOutline(false);
renderer.setItemMargin(0.10);
// set up gradient paints for series...
GradientPaint gp0 = new GradientPaint(
0.0f, 0.0f, Color.blue,
0.0f, 0.0f, Color.lightGray
);
GradientPaint gp1 = new GradientPaint(
0.0f, 0.0f, Color.green,
0.0f, 0.0f, Color.lightGray
);
GradientPaint gp2 = new GradientPaint(
0.0f, 0.0f, Color.red,
0.0f, 0.0f, Color.lightGray
);
renderer.setSeriesPaint(0, gp0);
renderer.setSeriesPaint(1, gp1);
renderer.setSeriesPaint(2, gp2);
renderer.setLabelGenerator(new BarChartDemo7.LabelGenerator());
renderer.setItemLabelsVisible(true);
ItemLabelPosition p = new ItemLabelPosition(
ItemLabelAnchor.INSIDE12, TextAnchor.CENTER_RIGHT,
TextAnchor.CENTER_RIGHT, -Math.PI / 2.0
);
renderer.setPositiveItemLabelPosition(p);
ItemLabelPosition p2 = new ItemLabelPosition(
ItemLabelAnchor.OUTSIDE12, TextAnchor.CENTER_LEFT,
TextAnchor.CENTER_LEFT, -Math.PI / 2.0
);
renderer.setPositiveItemLabelPositionFallback(p2);
CategoryAxis domainAxis = plot.getDomainAxis();
domainAxis.setCategoryLabelPositions(CategoryLabelPositions.UP_45);
// OPTIONAL CUSTOMISATION COMPLETED.
return chart;
}
// ****************************************************************************
// * JFREECHART DEVELOPER GUIDE *
// * The JFreeChart Developer Guide, written by David Gilbert, is available *
// * to purchase from Object Refinery Limited: *
// * *
// * http://www.object-refinery.com/jfreechart/guide.html *
// * *
// * Sales are used to provide funding for the JFreeChart project - please *
// * support us so that we can continue developing free software. *
// ****************************************************************************
/**
* Starting point for the demonstration application.
*
* @param args ignored.
*/
public static void main(String[] args) {
BarChartDemo7 demo = new BarChartDemo7("Bar Chart Demo 7");
demo.pack();
RefineryUtilities.centerFrameOnScreen(demo);
demo.setVisible(true);
}
}
esse codigo da erro na linha 185
renderer.setLabelGenerator(new BarChartDemo7.LabelGenerator());
dia qua nao acha o metodo .setLabelGenerator
e é bem onde gera a legenda…rs
estranho…consegue me ajudar ?
usando o metodo
renderer.setBaseItemLabelGenerator(new BarChartDemo7.LabelGenerator());
funciona… vlw galera pelo exemplo…