我使用 DatasetChangeListener 来监视某些 XYSeriesCollection 的修改，因为一个系列中的更改必须反映到我的应用程序图表的其他系列中。
public void datasetChanged(DatasetChangeEvent arg0) {
XYSeriesCollection d = (XYSeriesCollection)arg0.getDataset();
System.out.println(d.getGroup().getID());
}
我使用 DatasetGroup 来存储唯一标识数据集的字符串。
现在的重点是，我只想知道发生更改的数据集的单个条目，否则我将被迫迭代所有数据集并检查所有数据。有什么办法可以做到这一点吗？
例如，我想知道集合中的系列 1 在第三个元素的 y 值上发生了更改。这可能吗？
I'm using a DatasetChangeListener to monitor the modification of some XYSeriesCollection because a change in one series must be reflected to other series of my application's charts.
public void datasetChanged(DatasetChangeEvent arg0) {
XYSeriesCollection d = (XYSeriesCollection)arg0.getDataset();
System.out.println(d.getGroup().getID());
}
I'm using DatasetGroup to store a string that uniquely identify the dataset.
Now the point is, I would like to know only the single entry of the dataset on which the changed occured, otherwise I am forced to iterate through all the dataset and inspect all datas. Is there any way to do that?
For example I would like to know that a changed occured for the series 1 in the collection, on the y value of the third element. Is that possible?
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getDataset()在这种情况下可能没有用。相反，请查看的来源SeriesChangeEvent。您可能必须重写XYSeries跟踪更改详细信息。The
Datasetreturned bygetDataset()is probably not useful in this context. Instead, look at the source of aSeriesChangeEvent. You'll probably have to override one or more of theadd()methods in a subclass ofXYSeriesto track the change details.我使用 SeriesChangeListener 部分解决了问题，并向每个系列添加了描述字符串，但我仍然需要检查系列内的所有值。
这是比使用 DatasetChangeListener 更好的解决方案（我不需要检查数据集中所有系列的所有值），但它并不完美。
I partially solved using SeriesChangeListener and adding a description String to each serie, but I still need to inspect all the values inside the serie.
It's a better solution than using a DatasetChangeListener (I don't need to inspect all values of all series in the dataset) but it's not perfect.