我已经创建了一个使用JFreeChart和SQL的方法,它基本上根据数据库中存在的数据创建一个图。我有3种方法,一个例子,用户体重与时间。我希望在JTabbedPane中显示这些图形,但我不确定如何。当我在一个选项卡上调用方法时,它告诉我不允许使用static/void方法。我的方法没有参数。这是我最初的尝试:在JTabbedPane上调用方法
panelWeight = new JPanel();
panelWeight.setLayout(null);
panelWeight.add(StatGraph.WeightGraph());
编辑: 我回到绘图板,发现了一个之后)我不能把一个空的方法对元件和B)空布局不结垢。这是我重写的方法,我希望调用JTabbedPane,使该方法无效。
public static ChartFrame WeightGraph(){
ChartFrame returnFrame = null;
try{
ConnectionManager connectionManager = ConnectionManager.getInstance();
Connection connection = connectionManager.getConnection();
UserInfoManager user = new UserInfoManager();
int username = user.getId();
String query = "SELECT DATE, WEIGHT FROM STATS WHERE ID=" + username; JDBCCategoryDataset dataset = new JDBCCategoryDataset(connection, query);
JFreeChart chart = ChartFactory.createLineChart("WEIGHTvsDATE Chart", "Date", "Weight", dataset, PlotOrientation.VERTICAL, false, true, true);
BarRenderer renderer = null;
CategoryPlot plot = null;
renderer = new BarRenderer();
ChartFrame frame = new ChartFrame("Progress Log", chart);
returnFrame = frame;
//frame.setVisible(true);
//frame.setSize(750,400);
}
catch(Exception e){
JOptionPane.showMessageDialog(null,e);
}
return returnFrame;
}
我再回到GUI框架和下面的代码添加到该选项卡窗格的面板,通过点击收听激活。 panelWeight.add(StatGraph.WeightGraph()); 不过,我得到以下错误:
Exception in thread "AWT-EventQueue-0" java.lang.IllegalArgumentException: adding a window to a container
at java.awt.Container.checkNotAWindow(Container.java:488)
at java.awt.Container.addImpl(Container.java:1089)
at java.awt.Container.add(Container.java:415)
at GUI.PT.ProgressStatsPT.panelWeightMouseClicked(ProgressStatsPT.java:392)
at GUI.PT.ProgressStatsPT.access$600(ProgressStatsPT.java:26)
at GUI.PT.ProgressStatsPT$7.mouseClicked(ProgressStatsPT.java:138)
at java.awt.Component.processMouseEvent(Component.java:6528)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3324)
at java.awt.Component.processEvent(Component.java:6290)
at java.awt.Container.processEvent(Container.java:2234)
at java.awt.Component.dispatchEventImpl(Component.java:4881)
at java.awt.Container.dispatchEventImpl(Container.java:2292)
at java.awt.Component.dispatchEvent(Component.java:4703)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4898)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4542)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4462)
at java.awt.Container.dispatchEventImpl(Container.java:2278)
at java.awt.Window.dispatchEventImpl(Window.java:2750)
at java.awt.Component.dispatchEvent(Component.java:4703)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758)
at java.awt.EventQueue.access$500(EventQueue.java:97)
at java.awt.EventQueue$3.run(EventQueue.java:709)
at java.awt.EventQueue$3.run(EventQueue.java:703)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:86)
at java.awt.EventQueue$4.run(EventQueue.java:731)
at java.awt.EventQueue$4.run(EventQueue.java:729)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:728)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)
另请参阅这些[示例](http://stackoverflow.com/search?tab=votes&q=user%3a230513%20%5bjfreechart%5d%20jdbcXYdataset)提及'JDBCXYDataset',它适用于时间序列。如果这不是重复的,请编辑你的问题以包含一个[mcve],它显示你修改后的方法不是基于引用的例子。 – trashgod
@trashgod我找不到有关JFreeChart,SQL和JTabbedPane的资源。当我运行SQL查询时,可用资源返回问题。 –
'null'布局不可能缩放;我觉得你忽略了这些[引用例子](http://stackoverflow.com/a/24762078/230513)。 – trashgod