动态 JFreeChart 时间序列
基于这个example，我是现在能够收集数据并将其显示在图表中.我不知道如何将生成图表的代码集成到我的应用程序中.
/** @see http://stackoverflow.com/questions/5048852 */公共类 Atol 扩展 ApplicationFrame {private static final String TITLE =动态系列"；private static final String START = "开始";私有静态最终字符串 STOP =停止"；私有静态最终浮点数 MINMAX = 100；私有静态最终 int 计数 = 2 * 60;私有静态最终 int FAST = 100;私有静态最终 int SLOW = FAST * 5;私有静态最终随机随机=新随机()；私人定时器定时器；公共 Atol(最终字符串标题){超级(标题)；最终 DynamicTimeSeriesCollection 数据集= new DynamicTimeSeriesCollection(1, COUNT, new Second());dataset.setTimeBase(new Second(0, 0, 0, 1, 1, 2011));dataset.addSeries(gaussianData(), 0, 高斯数据");JFreeChart 图表 = createChart(dataset);最终的 JButton 运行 = 新的 JButton(STOP);run.addActionListener(new ActionListener() {@覆盖公共无效actionPerformed(ActionEvent e){字符串 cmd = e.getActionCommand();如果(STOP.equals(cmd)){计时器.stop();run.setText(START);} 别的 {计时器.start();运行.setText(停止)；}}});最终的 JComboBox 组合 = 新的 JComboBox();combo.addItem("Fast");combo.addItem(慢");组合.addActionListener(新的ActionListener(){@覆盖公共无效actionPerformed(ActionEvent e){if ("Fast".equals(combo.getSelectedItem())) {timer.setDelay(FAST);} 别的 {timer.setDelay(SLOW);}}});this.add(new ChartPanel(chart), BorderLayout.CENTER);JPanel btnPanel = new JPanel(new FlowLayout());btnPanel.add(运行);btnPanel.add(组合);this.add(btnPanel, BorderLayout.SOUTH);系统信息 si = 新系统信息()；//Criando uma nova classe de infos do SistemHardwareAbstractionLayer hal = si.getHardware();//Infos de Hardware do sistemaCentralProcessor cpu = hal.getProcessor();//E as informações da cpulong[] oldTricks = cpu.getSystemCpuLoadTicks();计时器 = 新计时器(快速，新 ActionListener(){浮动CPU(){双统计 = cpu.getSystemCpuLoadBetweenTicks(oldTricks);//Convertendo o valor de uso da CPU统计 = 统计 * 100d；双 teste = Math.round(stats * 100.0)/100.0;双 d = 睾丸；浮动 f = (浮动) d;System.out.println(f);返回 f;}浮动[]新数据=新浮动[1]；@覆盖公共无效actionPerformed(ActionEvent e){新数据[0] = cpu();数据集.advanceTime();dataset.appendData(newData);}});}私人浮动[] gaussianData() {浮动[] a = 新浮动[计数];for (int i = 0; i < a.length; i++) {a[i] = 2;}返回一个；}私人 JFreeChart createChart(最终 XYDataset 数据集){最终 JFreeChart 结果 = ChartFactory.createTimeSeriesChart(TITLE、hh:mm:ss"、milliVolts"、数据集、真、真、假)；最终 XYPlot 图 = result.getXYPlot();ValueAxis domain = plot.getDomainAxis();域.setAutoRange(真)；ValueAxis range = plot.getRangeAxis();range.setRange(-MINMAX, MINMAX);返回结果；}公共无效开始(){计时器.start();}公共静态无效主要(最终字符串[]参数){EventQueue.invokeLater(new Runnable() {@覆盖公共无效运行(){Atol 演示 = new Atol(TITLE);演示.pack();demo.setVisible(true);演示.start();}});}}
到我的 JFrame 代码(在另一个类中):
私有 void kButton3ActionPerformed(java.awt.event.ActionEvent evt) {//当我点击那个按钮时Atol 演示 = 新 Atol ("");chartCPU.add(new ChartPanel(demo));//这就是图表需要出现并重新调整到它的大小的JPanel}如果 JFreeChart 在一个构造函数中，我如何在 Atol 类中调用图表(JFreeChart 图表)?我没有得到！如何让它出现在我的 chartCPU JPanel 中?(这是一个名为TelaLogin的JFrame类，与Atol类不同.
您的原始问题询问如何捕获 CPU 数据并将其显示在图表中.由于相关方法具有低延迟，因此可以在 javax.swing.Timer 的操作侦听器中调用该方法，如图 这里和上面.
具有不可预测延迟的数据访问可能会阻塞 事件调度线程，在这种情况下，您应该改用 SwingWorker，如此处所示.p>
要将图表集成到您的应用程序中，请将示例的构造函数重构为工厂方法并采用以下方法之一:
CardLayout，显示在此处.JTabbedPane，显示在此处.JInternalFrame，显示在此处和这里.
[EDIT] Based on this example, I am now able to collect data and display it in a chart. I don't know exactly how to integrate that code that generates the chart into my application.
/** @see http://stackoverflow.com/questions/5048852 */
public class Atol extends ApplicationFrame {
private static final String TITLE = "Dynamic Series";
private static final String START = "Start";
private static final String STOP = "Stop";
private static final float MINMAX = 100;
private static final int COUNT = 2 * 60;
private static final int FAST = 100;
private static final int SLOW = FAST * 5;
private static final Random random = new Random();
private Timer timer;
public Atol(final String title) {
super(title);
final DynamicTimeSeriesCollection dataset
= new DynamicTimeSeriesCollection(1, COUNT, new Second());
dataset.setTimeBase(new Second(0, 0, 0, 1, 1, 2011));
dataset.addSeries(gaussianData(), 0, "Gaussian data");
JFreeChart chart = createChart(dataset);
final JButton run = new JButton(STOP);
run.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
String cmd = e.getActionCommand();
if (STOP.equals(cmd)) {
timer.stop();
run.setText(START);
} else {
timer.start();
run.setText(STOP);
}
}
});
final JComboBox combo = new JComboBox();
combo.addItem("Fast");
combo.addItem("Slow");
combo.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
if ("Fast".equals(combo.getSelectedItem())) {
timer.setDelay(FAST);
} else {
timer.setDelay(SLOW);
}
}
});
this.add(new ChartPanel(chart), BorderLayout.CENTER);
JPanel btnPanel = new JPanel(new FlowLayout());
btnPanel.add(run);
btnPanel.add(combo);
this.add(btnPanel, BorderLayout.SOUTH);
SystemInfo si = new SystemInfo(); //Criando uma nova classe de infos do Sistem
HardwareAbstractionLayer hal = si.getHardware(); //Infos de Hardware do sistema
CentralProcessor cpu = hal.getProcessor(); //E as informações da cpu
long[] oldTricks = cpu.getSystemCpuLoadTicks();
timer = new Timer(FAST, new ActionListener() {
float cpu() {
Double stats = cpu.getSystemCpuLoadBetweenTicks(oldTricks);
//Convertendo o valor de uso da CPU
stats = stats * 100d;
double teste = Math.round(stats * 100.0) / 100.0;
double d = teste;
float f = (float) d;
System.out.println(f);
return f;
}
float[] newData = new float[1];
@Override
public void actionPerformed(ActionEvent e) {
newData[0] = cpu();
dataset.advanceTime();
dataset.appendData(newData);
}
});
}
private float[] gaussianData() {
float[] a = new float[COUNT];
for (int i = 0; i < a.length; i++) {
a[i] = 2;
}
return a;
}
private JFreeChart createChart(final XYDataset dataset) {
final JFreeChart result = ChartFactory.createTimeSeriesChart(
TITLE, "hh:mm:ss", "milliVolts", dataset, true, true, false);
final XYPlot plot = result.getXYPlot();
ValueAxis domain = plot.getDomainAxis();
domain.setAutoRange(true);
ValueAxis range = plot.getRangeAxis();
range.setRange(-MINMAX, MINMAX);
return result;
}
public void start() {
timer.start();
}
public static void main(final String[] args) {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
Atol demo = new Atol(TITLE);
demo.pack();
demo.setVisible(true);
demo.start();
}
});
}
}
To my JFrame code (which is in another class):
private void kButton3ActionPerformed(java.awt.event.ActionEvent evt) {
// when I click in that button
Atol demo = new Atol ("");
chartCPU.add(new ChartPanel(demo)); //Thats the JPanel the chart need to appear and readjust to it size
}
How can I call the chart (JFreeChart chart) in Atol class if the JFreeChart is in one constructor? I didn't get!
How can I make it appear in my chartCPU JPanel? (which is one JFrame class called TelaLogin, not the same as the Atol one).
Your original question asked how to capture CPU data and display it in a chart. Because the relevant method has low latency, it's possible to invoke the method in the action listener of a javax.swing.Timer as shown here and above.
Data access with unpredictable latency may block the event dispatch thread, in which case you should use a SwingWorker instead, as shown here.
To integrate the chart into your application, refactor the example's constructor into a factory method and adopt an approach such as one of these:
CardLayout, shown here.JTabbedPane, shown here.JInternalFrame, shown here and here.
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