为啥我的 CSV 文件不能在我的图表上显示内容？
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【中文标题】为啥我的 CSV 文件不能在我的图表上显示内容？【英文标题】：Why can't my CSV File display the content onto my graph?为什么我的 CSV 文件不能在我的图表上显示内容？ 【发布时间】：2014-07-15 15:02:30 【问题描述】：基本上我的程序所做的是我有一个 csv 文件，它读取 毫秒（我转换的）和一个代表区域的字母。我试图将其显示为条形图，但每个字母（区域）都有不同的选项卡。我的 问题是试图将信件（来自文件）发送到我在标签中创建的特定区域。也许我错过了一些东西，但我不确定。任何帮助都感激不尽。
这是我的代码：
@SuppressWarnings( "serial", "deprecation" )
public class InductionTreeGraph extends JFrame
static TimeSeries ts = new TimeSeries("data", Millisecond.class);
public static void add(JTabbedPane jtp, String label, int mnemonic, AbstractButton button1)
int count = jtp.getTabCount();
JButton button = new JButton(label);
button.setBackground(Color.WHITE);
jtp.addTab(label, null, button, null);
jtp.setMnemonicAt(count, mnemonic);
public InductionTreeGraph() throws Exception
final XYDataset dataset = (XYDataset) createDataset();
final JFreeChart chart = createChart(dataset);
final ChartPanel chartPanel = new ChartPanel(chart);
chartPanel.setPreferredSize(new Dimension(1000, 400));
setContentPane(chartPanel);
JFrame frame = new JFrame("Induction Zone Chart");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
final JTabbedPane jtp = new JTabbedPane();
jtp.setTabLayoutPolicy(JTabbedPane.SCROLL_TAB_LAYOUT);
String zones[] = "Zone A", "Zone B", "Zone C", "Zone S",
"Zone SH","Zone W";
int mnemonic[] = KeyEvent.VK_A, KeyEvent.VK_B, KeyEvent.VK_C,
KeyEvent.VK_S, KeyEvent.VK_H,KeyEvent.VK_W;
for (int i = 0, n=zones.length; i<n; i++)
AbstractButton button1 = null;
InductionTreeGraph.add(jtp, zones[i], mnemonic[i], button1);
final JPanel p = new JPanel(new FlowLayout(FlowLayout.RIGHT));
p.add(new JButton(new AbstractAction("Update")
public void actionPerformed(ActionEvent e)
chartPanel.repaint();
));
frame.add(jtp, BorderLayout.NORTH);
frame.add(p, BorderLayout.SOUTH);
frame.getContentPane().add(chartPanel);
frame.pack();
frame.setVisible(true);
frame.setLocationRelativeTo(null);
@SuppressWarnings("deprecation")
private XYDataset createDataset()
final TimeSeriesCollection dataset = new TimeSeriesCollection();
dataset.addSeries(ts);
TreeMap<String,TreeMap<Integer,Integer[]>> zoneMap = getInductions("","");
// Iterate through all zones and print induction rates for every minute into
// every hour by zone...
Iterator<String> zoneIT = zoneMap.keySet().iterator();
while (zoneIT.hasNext())
String zone = zoneIT.next();
TreeMap<Integer,Integer[]> hourCountsInZoneMap = zoneMap.get(zone);
System.out.println("ZONE " + zone + " : ");
Iterator<Integer> hrIT = hourCountsInZoneMap.keySet().iterator();
while (hrIT.hasNext())
int hour = hrIT.next();
Integer [] indRatePerMinArray = hourCountsInZoneMap.get(hour);
for (int i=0; i< indRatePerMinArray.length; i++)
System.out.print(hour + ":");
System.out.print(i < 10 ? "0" + i : i);
System.out.println(" = " + indRatePerMinArray[i] + " induction(s)");
return dataset;
@SuppressWarnings("deprecation")
private JFreeChart createChart(XYDataset dataset)
final JFreeChart chart = ChartFactory.createXYBarChart(
"Induction Zone Chart",
"Hour",
true,
"Inductions Per Minute",
(IntervalXYDataset) dataset,
PlotOrientation.VERTICAL,
false,
true,
false
);
XYPlot plot = (XYPlot)chart.getPlot();
XYBarRenderer renderer = (XYBarRenderer)plot.getRenderer();
renderer.setBarPainter(new StandardXYBarPainter());
renderer.setDrawBarOutline(false);
ValueAxis axis = plot.getDomainAxis();
axis.setAutoRange(true);
axis.setFixedAutoRange(60000.0);
// Set an Induction target of 30 per minute
Marker target = new ValueMarker(30);
target.setPaint(java.awt.Color.blue);
target.setLabel("Induction Rate Target");
plot.addRangeMarker(target);
return chart;
private TreeMap<String, TreeMap<Integer, Integer[]>> getInductions(String mills, String zone)
// TreeMap of Inductions for Every Minute in Day Per Zone...
// Key = Zone
// Value = TreeMap of Inductions per Minute per Hour:
// Key = Hour
// Value = Array of 60 representing Induction Rate Per Minute
// (each element is the induction rate for that minute)
TreeMap<String, TreeMap<Integer, Integer[]>> zoneMap = new TreeMap<String, TreeMap<Integer, Integer[]>>();
// Input file name...
String fileName = "/home/a002384/ECLIPSE/IN070914.CSV";
try
BufferedReader br = new BufferedReader(new FileReader(fileName));
String line;
try
// Read a line from the csv file until it reaches to the end of the file...
while ((line = br.readLine()) != null)
// Parse a line of text in the CSV...
String [] indData = line.split("\\,");
long millisecond = Long.parseLong(indData[0]);
String zone1 = indData[1];
// The millisecond value is the number of milliseconds since midnight.
// From this, we can derive the hour and minute of the day as follows:
int secOfDay = (int)(millisecond / 1000);
int hrOfDay = secOfDay / 3600;
int minInHr = secOfDay % 3600 / 60;
// Obtain the induction rate TreeMap for the current zone.
// If this is a "newly-encountered" zone, create a new TreeMap.
TreeMap<Integer, Integer[]> hourCountsInZoneMap;
if (zoneMap.containsKey(zone1))
hourCountsInZoneMap = zoneMap.get(zone1);
else
hourCountsInZoneMap = new TreeMap<Integer, Integer[]>();
// Obtain the induction rate array for the current hour in the current zone.
// If this is a new hour in the current zone, create a new array,
// and initialize this array with all zeroes.
// The array is size 60, because there are 60 minutes in the hour.
// Each element in the array represents the induction rate for that minute.
Integer [] indRatePerMinArray;
if (hourCountsInZoneMap.containsKey(hrOfDay))
indRatePerMinArray = hourCountsInZoneMap.get(hrOfDay);
else
indRatePerMinArray = new Integer[60];
Arrays.fill(indRatePerMinArray, 0);
// Increment the induction rate for the current minute by one.
// Each line in the csv file represents a single induction at a
// single point in time.
indRatePerMinArray[minInHr]++;
// Add everything back into the TreeMaps if these are newly-created.
if (!hourCountsInZoneMap.containsKey(hrOfDay))
hourCountsInZoneMap.put(hrOfDay, indRatePerMinArray);
if (!zoneMap.containsKey(zone1))
zoneMap.put(zone1, hourCountsInZoneMap);
finally
br.close();
catch (Exception e)
e.printStackTrace();
return zoneMap;
@SuppressWarnings("deprecation")
public static void main(String[] args) throws Exception
try
InductionTreeGraph dem = new InductionTreeGraph();
dem.pack();
dem.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
while(true)
double millisecond = 2;
double num = millisecond;
System.out.println(num);
ts.addOrUpdate(new Millisecond(), num);
try
Thread.sleep(20);
catch (InterruptedException ex)
System.out.println(ex);
catch (Exception e)
e.printStackTrace();
【问题讨论】：
【参考方案1】：我的第一个建议是关于这一行：
setContentPane(chartPanel);
不要乱用内容窗格。改用这一行：
getContentPane().add(chartPanel);
我在您的代码中看到的问题是 InductionTreeGraph 扩展自 JFrame 并且您将此 chartPanel 设置为此框架的内容窗格，但随后您使用了一个新的 JFrame 局部变量（称为 frame ) 并将此 chartPanel 也添加到此框架中：
JFrame frame = new JFrame("Induction Zone Chart");
...
frame.getContentPane().add(chartPanel);
Swing 组件旨在“按原样”使用，因此它比继承更可取。话虽如此，您应该考虑在您的类声明中删除extends JFrame，并将您的所有组件（图表面板、按钮等）添加到此本地frame。
相关
您可能需要查看this Q&A 中显示的示例。这个或任何 @trashgod 在 Stack Overflow 中关于 JFreeChart 的示例（例如 this one）可能会帮助您更好地构建代码。
【讨论】：
+1 @user3841414 见Extends JFrame vs. creating it inside the the program以上是关于为啥我的 CSV 文件不能在我的图表上显示内容？的主要内容，如果未能解决你的问题，请参考以下文章
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