memoryusagedemo.java

Jfreechart 源码例子 是和jfreechart development Guide文档相配套的

package demo;

import java.awt.BasicStroke;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Container;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import javax.swing.BorderFactory;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.Timer;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.ChartUtilities;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.DateAxis;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.plot.XYPlot;
import org.jfree.chart.renderer.xy.XYItemRenderer;
import org.jfree.chart.renderer.xy.XYLineAndShapeRenderer;
import org.jfree.data.time.Millisecond;
import org.jfree.data.time.TimeSeries;
import org.jfree.data.time.TimeSeriesCollection;

public class MemoryUsageDemo extends JPanel
{
  private TimeSeries total = new TimeSeries("Total Memory", Millisecond.class);
  private TimeSeries free;

  public MemoryUsageDemo(int paramInt)
  {
    super(new BorderLayout());
    this.total.setMaximumItemAge(paramInt);
    this.free = new TimeSeries("Free Memory", Millisecond.class);
    this.free.setMaximumItemAge(paramInt);
    TimeSeriesCollection localTimeSeriesCollection = new TimeSeriesCollection();
    localTimeSeriesCollection.addSeries(this.total);
    localTimeSeriesCollection.addSeries(this.free);
    DateAxis localDateAxis = new DateAxis("Time");
    NumberAxis localNumberAxis = new NumberAxis("Memory");
    localDateAxis.setTickLabelFont(new Font("SansSerif", 0, 12));
    localNumberAxis.setTickLabelFont(new Font("SansSerif", 0, 12));
    localDateAxis.setLabelFont(new Font("SansSerif", 0, 14));
    localNumberAxis.setLabelFont(new Font("SansSerif", 0, 14));
    XYLineAndShapeRenderer localXYLineAndShapeRenderer = new XYLineAndShapeRenderer(true, false);
    localXYLineAndShapeRenderer.setSeriesPaint(0, Color.red);
    localXYLineAndShapeRenderer.setSeriesPaint(1, Color.green);
    localXYLineAndShapeRenderer.setSeriesStroke(0, new BasicStroke(3.0F, 0, 2));
    localXYLineAndShapeRenderer.setSeriesStroke(1, new BasicStroke(3.0F, 0, 2));
    XYPlot localXYPlot = new XYPlot(localTimeSeriesCollection, localDateAxis, localNumberAxis, localXYLineAndShapeRenderer);
    localDateAxis.setAutoRange(true);
    localDateAxis.setLowerMargin(0D);
    localDateAxis.setUpperMargin(0D);
    localDateAxis.setTickLabelsVisible(true);
    localNumberAxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());
    JFreeChart localJFreeChart = new JFreeChart("JVM Memory Usage", new Font("SansSerif", 1, 24), localXYPlot, true);
    ChartUtilities.applyCurrentTheme(localJFreeChart);
    ChartPanel localChartPanel = new ChartPanel(localJFreeChart, true);
    localChartPanel.setBorder(BorderFactory.createCompoundBorder(BorderFactory.createEmptyBorder(4, 4, 4, 4), BorderFactory.createLineBorder(Color.black)));
    add(localChartPanel);
  }

  private void addTotalObservation(double paramDouble)
  {
    this.total.add(new Millisecond(), paramDouble);
  }

  private void addFreeObservation(double paramDouble)
  {
    this.free.add(new Millisecond(), paramDouble);
  }

  public static void main(String[] paramArrayOfString)
  {
    JFrame localJFrame = new JFrame("Memory Usage Demo");
    MemoryUsageDemo localMemoryUsageDemo = new MemoryUsageDemo(30000);
    localJFrame.getContentPane().add(localMemoryUsageDemo, "Center");
    localJFrame.setBounds(200, 120, 600, 280);
    localJFrame.setVisible(true);
    MemoryUsageDemo tmp56_55 = localMemoryUsageDemo;
    tmp56_55.getClass();
    new DataGenerator(tmp56_55, 100).start();
    localJFrame.addWindowListener(new WindowAdapter()
    {
      public void windowClosing(WindowEvent paramWindowEvent)
      {
        System.exit(0);
      }
    });
  }

  static void access$000(MemoryUsageDemo paramMemoryUsageDemo, double paramDouble)
  {
    paramMemoryUsageDemo.addTotalObservation(paramDouble);
  }

  static void access$100(MemoryUsageDemo paramMemoryUsageDemo, double paramDouble)
  {
    paramMemoryUsageDemo.addFreeObservation(paramDouble);
  }

  class DataGenerator extends Timer
  implements ActionListener
  {
    private final MemoryUsageDemo this$0;

    DataGenerator(, int paramInt)
    {
      super(paramInt, null);
      this.this$0 = paramMemoryUsageDemo;
      addActionListener(this);
    }

    public void actionPerformed()
    {
      long l1 = Runtime.getRuntime().freeMemory();
      long l2 = Runtime.getRuntime().totalMemory();
      MemoryUsageDemo.access$000(this.this$0, l2);
      MemoryUsageDemo.access$100(this.this$0, l1);
    }
  }
}