jtable问题

    JScrollPane jscrollPane = new JScrollPane();

    for (Object date : keys) {
        //每次循环 都建立一个jtable
        List<HistoryMessage> hmList = (List<HistoryMessage>) sourceMap.get(date);
        Object[][] rowData = new Object[hmList.size()][3];

        JPanel topPanel = new JPanel();
        JLabel jTopLabel = new JLabel();
        jTopLabel.setText((String)date);
        topPanel.add(jTopLabel);//这个panel没有显示

        for (int i=0;i<hmList.size();i++) {
            rowData[i][0]=sdf2.format(hm.getDate());
            rowData[i][1]=hm.getName();
            rowData[i][2]=hm.getContent();
        }
        JTable jtable = new JTable(rowData, columnNames);
        //把topPanel添加到jscrollpane中
        jscrollPane.add(topPanel);
        //把jtable添加到jscrollpane中
        jscrollPane.getViewport().add(jtable);

    }

[img]http://dl.iteye.com/upload/attachment/550094/4a566c17-f8b2-3bd4-b5d9-544f33d7d5b3.png[/img]
没有标题 什么的，而且遍历只运行了一次啊，应该有好几个panel才对啊，求解答

[quote]JPanel topPanel = new JPanel(); [/quote]
这句话被你放在 for 循环里面了，移出来吧

[code="java"]
//先建视图
JPanel view=new JPanel(new GridLayout(0, 1));
for (Object date : keys) {
//每次循环 都建立一个jtable
List hmList = (List) sourceMap.get(date);
Object[][] rowData = new Object[hmList.size()][3];

JPanel topPanel = new JPanel();
JLabel jTopLabel = new JLabel();
jTopLabel.setText((String)date);
topPanel.add(jTopLabel);

for (int i=0;i<hmList.size();i++) {
rowData[i][0]=sdf2.format(hm.getDate());
rowData[i][1]=hm.getName();
rowData[i][2]=hm.getContent();
}
JTable jtable = new JTable(rowData, columnNames);
//把topPanel添加到view中
view.add(topPanel);
//把jtable添加到view中
view.getViewport().add(jtable);

}
//用视图构造JScrollPane
JScrollPane jscrollPane = new JScrollPane(view);

[/code]

//把jtable添加到view中

view.getViewport().add(jtable);
不对

应该是
view.add(jtable);

高度是指JPanel view=new JPanel(new GridLayout(0, 1));

的高度？
view.getHeight();