固定大小是因为JPanel的默认布局是FlowLayout，它使用表的首选大小。相反，使用类似于GridLayout的方法，这样可以填充可用空间。

JPanel panel = new JPanel(new GridLayout());

这段代码可以帮助您设置表的行高。

table.setRowHeight(anInteger);

此外，您知道，使用此代码，您可以获得令人愉悦的jtabel高度：

int scrollPaneHeight = scrollPane.getHeight();

所以您希望每一行都有这样的高度：

int spaceForRows = scrollPaneHeight -heightOfheaderOfTabel;

float rowH =(float) spaceForRows / (rowData.length );  

但正如您所知，当您重新调整jframe的大小时，您的滚动窗格和表格不能两次全屏显示。因此，您最多使用componentListener。因此，当您的组件重新调整代码大小时，请计算rowH两次。完整的代码是

public static void main(String[] args) {
    // TODO Auto-generated method stub
    final JFrame frame = new JFrame();
    final JTabbedPane tabbedPane = new JTabbedPane(JTabbedPane.TOP);
    frame.setContentPane(tabbedPane);
    final Object rowData[][] = {
            { "Row1-Column1", "Row1-Column2", "", "", "", "", "" },
            { "Row1-Column1", "Row1-Column2", "", "", "", "", "" },
            { "Row1-Column1", "Row1-Column2", "", "", "", "", "" },
            { "Row1-Column1", "Row1-Column2", "", "", "", "", "" },
            { "Row1-Column1", "Row1-Column2", "", "", "", "", "" },
            { "Row2-Column1", "Row2-Column2", "Row2-Column3", "", "", "",
                    "", "" } };
    Object columnNames[] = { "Column One", "Column Two", "Column Three",
            "", "", "", "" };
    final JTable table = new JTable(rowData, columnNames);
    final JScrollPane scrollPane = new JScrollPane(table);

    tabbedPane.addTab("table", null, scrollPane, null);
    frame.setSize(new Dimension(500, 500));

    tabbedPane.addComponentListener(new ComponentListener() {

        @Override
        public void componentShown(ComponentEvent arg0) {
            // TODO Auto-generated method stub

        }

        @Override
        public void componentResized(ComponentEvent arg0) {
            // TODO Auto-generated method stub

            int scrollPaneHeight = scrollPane.getHeight();
            JTableHeader header = table.getTableHeader();
            int heightOfheaderOfTabel = header.getHeight();
            int spaceForRows = scrollPaneHeight - heightOfheaderOfTabel;
            float rowH = (float) spaceForRows / (rowData.length);
            table.setRowHeight((int) rowH);

        }

        @Override
        public void componentMoved(ComponentEvent arg0) {
            // TODO Auto-generated method stub

        }

        @Override
        public void componentHidden(ComponentEvent arg0) {
            // TODO Auto-generated method stub

        }
    });

    frame.setVisible(true);

}