JFreeChart儀表圖DialChartDemo1

在學習使用JFreeChart儀表圖時，發現國內資源很少，所以分享一些Demo給大家。所需的JFreeChart－jar可以自己下載，也可以在我的分享裏面免費下載。

效果如下：

項目源碼：

package com.hellojava.jfreechart;

import java.awt.*;
import javax.swing.*;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.plot.dial.*;
import org.jfree.data.general.DefaultValueDataset;
import org.jfree.data.general.ValueDataset;
import org.jfree.ui.GradientPaintTransformType;
import org.jfree.ui.StandardGradientPaintTransformer;

@SuppressWarnings(“serial”)
public class DialDemo1 extends JFrame
{
static class DemoPanel extends JPanel
implements ChangeListener
{

    JSlider slider;
    DefaultValueDataset dataset;

    public static JFreeChart createStandardDialChart(String s, String s1, ValueDataset valuedataset, double d, double d1, double d2, int i)
    {
        DialPlot dialplot = new DialPlot();
        dialplot.setDataset(valuedataset);
        dialplot.setDialFrame(new StandardDialFrame());
        dialplot.setBackground(new DialBackground());
        DialTextAnnotation dialtextannotation = new DialTextAnnotation(s1);
        dialtextannotation.setFont(new Font("Dialog", 1, 14));
        dialtextannotation.setRadius(0.69999999999999996D);
        dialplot.addLayer(dialtextannotation);
        DialValueIndicator dialvalueindicator = new DialValueIndicator(0);
        dialplot.addLayer(dialvalueindicator);
        StandardDialScale standarddialscale = new StandardDialScale(d, d1, -120D, -300D, 10D, 4);
        standarddialscale.setMajorTickIncrement(d2);
        standarddialscale.setMinorTickCount(i);
        standarddialscale.setTickRadius(0.88D);
        standarddialscale.setTickLabelOffset(0.14999999999999999D);
        standarddialscale.setTickLabelFont(new Font("Dialog", 0, 14));
        dialplot.addScale(0, standarddialscale);
        dialplot.addPointer(new org.jfree.chart.plot.dial.DialPointer.Pin());
        DialCap dialcap = new DialCap();
        dialplot.setCap(dialcap);
        return new JFreeChart(s, dialplot);
    }

    public void stateChanged(ChangeEvent changeevent)
    {
        dataset.setValue(new Integer(slider.getValue()));
    }

    public DemoPanel()
    {
        super(new BorderLayout());
        dataset = new DefaultValueDataset(10D);
        JFreeChart jfreechart = createStandardDialChart("Dial Demo 1", "Temperature", dataset, -40D, 60D, 10D, 4);
        DialPlot dialplot = (DialPlot)jfreechart.getPlot();
        StandardDialRange standarddialrange = new StandardDialRange(40D, 60D, Color.red);
        standarddialrange.setInnerRadius(0.52000000000000002D);
        standarddialrange.setOuterRadius(0.55000000000000004D);
        dialplot.addLayer(standarddialrange);
        StandardDialRange standarddialrange1 = new StandardDialRange(10D, 40D, Color.orange);
        standarddialrange1.setInnerRadius(0.52000000000000002D);
        standarddialrange1.setOuterRadius(0.55000000000000004D);
        dialplot.addLayer(standarddialrange1);
        StandardDialRange standarddialrange2 = new StandardDialRange(-40D, 10D, Color.green);
        standarddialrange2.setInnerRadius(0.52000000000000002D);
        standarddialrange2.setOuterRadius(0.55000000000000004D);
        dialplot.addLayer(standarddialrange2);
        GradientPaint gradientpaint = new GradientPaint(new Point(), new Color(255, 255, 255), new Point(), new Color(170, 170, 220));
        DialBackground dialbackground = new DialBackground(gradientpaint);
        dialbackground.setGradientPaintTransformer(new StandardGradientPaintTransformer(GradientPaintTransformType.VERTICAL));
        dialplot.setBackground(dialbackground);
        dialplot.removePointer(0);
        org.jfree.chart.plot.dial.DialPointer.Pointer pointer = new org.jfree.chart.plot.dial.DialPointer.Pointer();
        pointer.setFillPaint(Color.yellow);
        dialplot.addPointer(pointer);
        ChartPanel chartpanel = new ChartPanel(jfreechart);
        chartpanel.setPreferredSize(new Dimension(400, 400));
        slider = new JSlider(-40, 60);
        slider.setMajorTickSpacing(10);
        slider.setPaintLabels(true);
        slider.addChangeListener(this);
        add(chartpanel);
        add(slider, "South");
    }
}


public DialDemo1(String s)
{
    super(s);
    setDefaultCloseOperation(3);
    setContentPane(createDemoPanel());
}

public static JPanel createDemoPanel()
{
    return new DemoPanel();
}

public static void main(String args[])
{
    DialDemo1 dialdemo1 = new DialDemo1("JFreeChart - Demo Dial 1");
    dialdemo1.pack();
    dialdemo1.setVisible(true);
}

}

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