我已經創建了一個使用JFreeChart和SQL的方法,它基本上根據數據庫中存在的數據創建一個圖。我有3種方法,一個例子,用戶體重與時間。我希望在JTabbedPane中顯示這些圖形,但我不確定如何。當我在一個選項卡上調用方法時,它告訴我不允許使用static/void方法。我的方法沒有參數。這是我最初的嘗試:在JTabbedPane上調用方法
panelWeight = new JPanel();
panelWeight.setLayout(null);
panelWeight.add(StatGraph.WeightGraph());
編輯: 我回到繪圖板,發現了一個之後)我不能把一個空的方法對元件和B)空佈局不結垢。這是我重寫的方法,我希望調用JTabbedPane,使該方法無效。
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框架和下面的代碼添加到該選項卡窗格的面板,通過點擊收聽激活。 panelWeight.add(StatGraph.WeightGraph()); 不過,我得到以下錯誤:
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)
另請參閱這些[示例](http://stackoverflow.com/search?tab=votes&q=user%3a230513%20%5bjfreechart%5d%20jdbcXYdataset)提及'JDBCXYDataset',它適用於時間序列。如果這不是重複的,請編輯你的問題以包含一個[mcve],它顯示你修改後的方法不是基於引用的例子。 – trashgod
@trashgod我找不到有關JFreeChart,SQL和JTabbedPane的資源。當我運行SQL查詢時,可用資源返回問題。 –
'null'佈局不可能縮放;我覺得你忽略了這些[引用例子](http://stackoverflow.com/a/24762078/230513)。 – trashgod