Java JFreeChart:从另一个类接收新值时更新/重新绘制折线图
这只是我的第二篇文章,如果我没有正确遵守规则,请原谅我。我正在尝试自动更新一个使用JFreeChart库创建的折线图。我已经尝试了几天了,并且参考了很多例子,并且 我有一个方法可以获取帐户余额并将其发送到另一个类:Java JFreeChart:从另一个类接收新值时更新/重新绘制折线图,java,jfreechart,Java,Jfreechart,这只是我的第二篇文章,如果我没有正确遵守规则,请原谅我。我正在尝试自动更新一个使用JFreeChart库创建的折线图。我已经尝试了几天了,并且参考了很多例子,并且 我有一个方法可以获取帐户余额并将其发送到另一个类: public double credit(double d) { int bonus = 10; if (d >= 500){ logData = "CREDITED: + £" + df.format(d) + "\n **********
public double credit(double d)
{
int bonus = 10;
if (d >= 500){
logData = "CREDITED: + £" + df.format(d) + "\n ********** Whohoo a £10.00 bonus has been added to your balance for depositing at least £500 in a single month **********\n";
currentBalance = currentBalance + d + bonus;
draw.passBalance(currentBalance);
draw.paint(currentBalance); //Send balance to Draw class for the graph (CPB)
} else {
logData = "CREDITED: + £" + df.format(d) + "\n";
currentBalance = currentBalance + d;
}
return currentBalance;
}
接收该数据的类处理图形的数据:
public class Draw extends ApplicationFrame {
private double balance;
private ChartPanel chartPanel;
private JFreeChart chart;
private XYDataset dataset;
private Draw graph;
public Draw(final String title) {
super(title);
dataset = createDataset();
chart = createChart(dataset);
chartPanel = new ChartPanel(chart);
chartPanel.setPreferredSize(new Dimension(750, 350));
setContentPane(chartPanel);
}
private XYDataset createDataset() {
final XYSeries series1 = new XYSeries("Balance");
series1.add(1.0, balance);
series1.add(2.0, balance);
series1.add(3.0, 100.00);
series1.add(4.0, 100.00);
series1.add(5.0, 100.00);
series1.add(6.0, 100.00);
series1.add(7.0, 100.00);
series1.add(8.0, 100.00);
series1.add(9.0, 100.00);
series1.add(10.0, 100.00);
series1.add(11.0, 100.00);
series1.add(12.0, 100.00);
System.out.println(balance);
final XYSeriesCollection dataset = new XYSeriesCollection();
dataset.addSeries(series1);
return dataset;
}
private JFreeChart createChart(final XYDataset dataset) {
// create the chart...
final JFreeChart chart = ChartFactory.createXYLineChart(
"Account Balance", // chart title
"Month", // x axis label
"Balance", // y axis label
dataset, // data
PlotOrientation.VERTICAL,
false, // include legend
true, // tooltips
false // urls
);
chart.setBackgroundPaint(Color.white);
final XYPlot plot = chart.getXYPlot();
plot.setBackgroundPaint(Color.white);
plot.setDomainGridlinePaint(Color.lightGray);
plot.setRangeGridlinePaint(Color.lightGray);
final XYLineAndShapeRenderer renderer = new XYLineAndShapeRenderer();
renderer.setSeriesLinesVisible(1, true);
plot.setRenderer(renderer);
return chart;
}
public double passBalance(double d)
{
return balance = d;
}
public void paint(double d)
{
//System.out.println(balance);
createDataset();
}
}
我的理解是,图表将被重新绘制,因为所有方法都会抛出一个SeriesChangeEvent,但情况似乎并非如此
我对Java比较陌生,非常感谢您的帮助
感谢为了帮助隔离问题,我将您的代码简化为一个,用于更新
XYSeriesCollection
中XYSeriesCollection
中的单个XYDataItem
。请注意,每个XYDataItem
封装了Number
的两个实例;根据XYSeries的要求,每个都是可比的<代码>添加(双x,双y)将每个值转换为double
。单击“更新”按钮查看效果。项目索引
每次单击应增加5
导入java.awt.BorderLayout;
导入java.awt.Dimension;
导入java.awt.EventQueue;
导入java.awt.event.ActionEvent;
导入javax.swing.AbstractAction;
导入javax.swing.JButton;
导入org.jfree.chart.ChartFactory;
导入org.jfree.chart.ChartPanel;
导入org.jfree.chart.JFreeChart;
导入org.jfree.chart.plot.PlotOrientation;
导入org.jfree.data.xy.XYDataset;
导入org.jfree.data.xy.XYSeries;
导入org.jfree.data.xy.XYSeriesCollection;
导入org.jfree.ui.ApplicationFrame;
/**@见https://stackoverflow.com/a/33898324/230513 */
公共类Draw扩展了ApplicationFrame{
私有静态最终整数指数=5;
私人最终XYSeries=新XYSeries(“余额”);
私人双平衡;
公共静态void main(字符串[]args){
EventQueue.invokeLater(()->{
新图纸(“测试”);
});
}
公开抽签(最终字符串标题){
超级(标题);
setDefaultCloseOperation(关闭时退出);
ChartPanel ChartPanel=新建ChartPanel(createChart(createDataset())){
@凌驾
公共维度getPreferredSize(){
返回新尺寸(640360);
}
};
添加(图表面板);
添加(新JButton(新抽象操作(“更新”){
@凌驾
已执行的公共无效操作(操作事件e){
余额+=5;
系列。添加或更新(索引、余额);
}
}),边界布局(南部);
包装();
setLocationRelativeTo(空);
setVisible(真);
}
私有XYDataset createDataset(){
对于(int i=0;i<11;i++){
系列。添加(i,100.00);
}
系列。删除(索引);
系列。添加(索引、平衡);
最终XYSeriesCollection数据集=新的XYSeriesCollection();
dataset.addSeries(系列);
返回数据集;
}
私有JFreeChart createChart(最终XYDataset数据集){
最终JFreeChart图表=ChartFactory.createXYLineChart(
“账户余额”,//图表标题
“月”//x轴标签
“平衡”//y轴标签
数据集,//数据
PlotOrientation.VERTICAL,
false,//包含图例
true,//工具提示
false//url
);
收益表;
}
}
感谢@trashgood的及时回复。很抱歉没有将我的代码作为一个独立的示例提供,我将在下一篇文章中继续介绍,但在您指出之前,我并不知道这个资源。我以您为例,将其合并到我的代码中。现在我的图表正在更新,尽管有点不稳定。我需要最小化它的更新窗口。如果我记得以前有人发布过关于这个问题的帖子,那么我需要添加getContentPane().removeAll();和chartPanel.revalidate();以使窗口正确更新。谢谢你的帮助。我将接受这个答案。是的,这会奏效;但原位更新也应该起作用。对于不稳定的,不要忽略调用。
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.event.ActionEvent;
import javax.swing.AbstractAction;
import javax.swing.JButton;
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.xy.XYDataset;
import org.jfree.data.xy.XYSeries;
import org.jfree.data.xy.XYSeriesCollection;
import org.jfree.ui.ApplicationFrame;
/** @see https://stackoverflow.com/a/33898324/230513 */
public class Draw extends ApplicationFrame {
private static final int INDEX = 5;
private final XYSeries series = new XYSeries("Balance");
private double balance;
public static void main(String[] args) {
EventQueue.invokeLater(() -> {
new Draw("Test");
});
}
public Draw(final String title) {
super(title);
setDefaultCloseOperation(EXIT_ON_CLOSE);
ChartPanel chartPanel = new ChartPanel(createChart(createDataset())) {
@Override
public Dimension getPreferredSize() {
return new Dimension(640, 360);
}
};
add(chartPanel);
add(new JButton(new AbstractAction("Update") {
@Override
public void actionPerformed(ActionEvent e) {
balance += 5;
series.addOrUpdate(INDEX, balance);
}
}), BorderLayout.SOUTH);
pack();
setLocationRelativeTo(null);
setVisible(true);
}
private XYDataset createDataset() {
for (int i = 0; i < 11; i++) {
series.add(i, 100.00);
}
series.remove(INDEX);
series.add(INDEX, balance);
final XYSeriesCollection dataset = new XYSeriesCollection();
dataset.addSeries(series);
return dataset;
}
private JFreeChart createChart(final XYDataset dataset) {
final JFreeChart chart = ChartFactory.createXYLineChart(
"Account Balance", // chart title
"Month", // x axis label
"Balance", // y axis label
dataset, // data
PlotOrientation.VERTICAL,
false, // include legend
true, // tooltips
false // urls
);
return chart;
}
}