更新 模型 ，随后将显示侦听 视图
。动画更新，而不会阻塞事件调度线程，使用
javax.swing.Timer;
stop()根据需要调用。
经测试：
import java.awt.BorderLayout;import java.awt.Dimension;import java.awt.EventQueue;import java.awt.event.ActionEvent;import java.util.Random;import javax.swing.AbstractAction;import javax.swing.JButton;import javax.swing.Jframe;import org.jfree.chart.ChartFactory;import org.jfree.chart.ChartPanel;import org.jfree.chart.JFreeChart;import org.jfree.chart.plot.PlotOrientation;import org.jfree.data.category.DefaultCategoryDataset;public class Test { private static final String ROW_KEY = "Values"; private static final Random r = new Random(); private void display() { Jframe f = new Jframe("Test"); f.setDefaultCloseOperation(Jframe.EXIT_ON_CLOSE); final DefaultCategoryDataset model = new DefaultCategoryDataset(); model.setValue(1, ROW_KEY, "1"); model.setValue(2, ROW_KEY, "2"); model.setValue(3, ROW_KEY, "3"); JFreeChart chart = ChartFactory.createBarChart("Proxi", "Sensors", "Value", model, PlotOrientation.VERTICAL, false, true, false); ChartPanel barPanel = new ChartPanel(chart) { @Override public Dimension getPreferredSize() { return new Dimension(320, 240); } }; f.add(barPanel); f.add(new JButton(new AbstractAction("Update") { @Override public void actionPerformed(ActionEvent e) { model.setValue(r.nextDouble() * 3, ROW_KEY, "2"); } }), BorderLayout.SOUTH); f.pack(); f.setLocationRelativeTo(null); f.setVisible(true); } public static void main(String[] args) { EventQueue.invokeLater(new Runnable() { @Override public void run() { new Test().display(); } }); }}
