DefaultTableModel model=new DefaultTableModel(rows,columnHeads);
columnHeads.addElement("数值");
for(int i=0;i<1000;i++){
rows.addElement(water[i]);
}
wmTable=new JTable(model);
validate();Exception in thread "AWT-EventQueue-0" java.lang.ClassCastException: java.lang.Float
at javax.swing.table.DefaultTableModel.justifyRows(DefaultTableModel.java:242)
at javax.swing.table.DefaultTableModel.setDataVector(DefaultTableModel.java:198)
at javax.swing.table.DefaultTableModel.<init>(DefaultTableModel.java:133)
at water.WaterSystem.actionPerformed(WaterSystem.java:419)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1849)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2169)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:420)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:258)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:236)
at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:231)
at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:231)
at java.awt.Component.processMouseEvent(Component.java:5488)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3126)
at java.awt.Component.processEvent(Component.java:5253)
at java.awt.Container.processEvent(Container.java:1966)
at java.awt.Component.dispatchEventImpl(Component.java:3955)
at java.awt.Container.dispatchEventImpl(Container.java:2024)
at java.awt.Component.dispatchEvent(Component.java:3803)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4212)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3892)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3822)
at java.awt.Container.dispatchEventImpl(Container.java:2010)
at java.awt.Window.dispatchEventImpl(Window.java:1778)
at java.awt.Component.dispatchEvent(Component.java:3803)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:463)
at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:242)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:163)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:157)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:149)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:110)

解决方案 »

  1.   

    补充:Vector columnHeads = new Vector();
        Vector rows = new Vector();
      

  2.   


    columnHeads.addElement("数值");
    for(int i=0;i<1000;i++){
    rows.addElement(water[i]);
    }
    DefaultTableModel model=new DefaultTableModel(rows,columnHeads);
    wmTable=new JTable(model);颠倒一下次序试试
      

  3.   

    代码改为:如下,可以显示表格,但是不能显示滚动条啊?userIdTextarea = new JTextArea(14, 16); userIdTextarea.setEditable(true); String[] columnHeads = { "palnet", "radius" };
    Object[][] rows = { { "ss", 2440.0, 0, false, Color.red },
    { "ss", 24.0 }, { "ss", 24.0 }, { "ss", 24.0 },
    { "ss", 24.0 }, { "ss", 24.0 }, { "ss", 24.0 },
    { "ss", 24.0 }, { "ss", 24.0 }, { "ss", 24.0 } }; DefaultTableModel model = new DefaultTableModel(rows, columnHeads);
    wmTable = new JTable(model);
    wmScrollPane = new JScrollPane(wmTable);
    sp = new JSplitPane(JSplitPane.VERTICAL_SPLIT, userIdTextarea,
    wmTable);
    sp.setDividerLocation(100); generalwmpanel.add(generalwmbutton); generalwmpanel.add(sp);
      

  4.   

    sp = new JSplitPane(JSplitPane.VERTICAL_SPLIT, userIdTextarea,
    wmTable);
    上面的这句 wmTable应该是 wmScrollPane
      

  5.   

    楼上的那个是在程序里面写的参数吧
    如果我要建立一个SQL,然后从SQL里面调参数呢?
    新手问题,请达淫包涵。。