小编Abh*_*ash的帖子

我写了一个简单的服务器和客户端示例如下.

客户:

• 打开连接
• 获取输出流,写入流并关闭输出流

• 获取输入流并从流中读取.此时获得例外

  public class DateServer {
  public static void main(String[] args) throws InterruptedException {
  ServerSocket serverSocket = null;
  Socket client = null;
  try {
      serverSocket = new ServerSocket(6013);
      while (true) {
          client = serverSocket.accept();
          OutputStream outputStream = client.getOutputStream();
          InputStream inputStream = client.getInputStream();
  
          System.out.println("" + outputStream + "-" + inputStream);
  
          BufferedReader bufferedReader = new BufferedReader(
                  new InputStreamReader(inputStream));
  
          String line = null;
          while ((line = bufferedReader.readLine()) != null) {
              System.out
                      .println("Message recieved from client ::" + line);
          }
  
          PrintWriter …

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我正在使用JFreeChart XYPLot绘制具有不同标签的XYData集.我为不同的标签创建了不同的XYSeries对象,这样我就可以为不同的标签设置不同的颜色.现在我需要更改每个XYDataSeries中特定点(测试数据)的形状,如下所示.在上面的绘图中,有两种不同的XYSeries,蓝色和红色.在这两个中,我需要将某些点(测试数据)的形状更改为X而不是圆形.是否有可能在JFreeChart. 这篇文章解释了如何为整个数据集做到这一点,但我想只改变特定点

下面是我到目前为止编写的代码

  public static Map<String, XYSeries> createXYSeries(Data[] dataSet){       
    Map<String,XYSeries> xySeries = new HashMap<String, XYSeries>();        
    for(Data data : dataSet){
        if(xySeries.get(data.actualLabel) == null){
            xySeries.put(data.actualLabel, new XYSeries(data.actualLabel));
        }
        xySeries.get(data.actualLabel).add(data.dimensionValues[0],data.dimensionValues[1]);
    }   

    return xySeries;
}

   public XYDataset createXYSeriesCollection(Map<String, XYSeries> plottingDataSet) {
    XYSeriesCollection xySeriesCollection = new XYSeriesCollection();
    for (String key : plottingDataSet.keySet()) {
        xySeriesCollection.addSeries(plottingDataSet.get(key));
    }
    return xySeriesCollection;
}

   private ChartPanel createPlottingPanel(String title,
        Map<String, XYSeries> plottingDataSet) {
    JFreeChart jfreechart = ChartFactory.createScatterPlot(title, "X", "Y",
            createSampleData(plottingDataSet), PlotOrientation.VERTICAL,
            true, true, false);
    XYPlot xyPlot = (XYPlot) jfreechart.getPlot(); …