如何为JTable标题设置自定义工具提示位置？

import javax.swing.*;
import javax.swing.table.JTableHeader;
import java.awt.*;
import java.awt.event.MouseEvent;
import java.awt.event.MouseMotionAdapter;

public class CustomTableHeader extends JTableHeader {

    public CustomTableHeader(JTable table) {
        super(table);

        addMouseMotionListener(new MouseMotionAdapter() {
            @Override
            public void mouseMoved(MouseEvent e) {
                TableColumnModel columnModel = table.getColumnModel();
                int column = columnModel.getColumnIndexAtX(e.getX());
                int realColumnIndex = table.convertColumnIndexToModel(column);
                TableColumn tableColumn = columnModel.getColumn(realColumnIndex);
                String columnName = (String) tableColumn.getHeaderValue();

                // 设置自定义工具提示文本
                setToolTipText("自定义工具提示位置：" + columnName);

                // 设置工具提示位置
                ToolTipManager.sharedInstance().setInitialDelay(0);
                Point point = e.getPoint();
                point.y += 20; // 调整工具提示位置
                ToolTipManager.sharedInstance().mouseMoved(new MouseEvent(CustomTableHeader.this, e.getID(), e.getWhen(), e.getModifiers(), point.x, point.y, e.getXOnScreen(), e.getYOnScreen(), e.getClickCount(), e.isPopupTrigger(), MouseEvent.NOBUTTON));
            }
        });
    }
}

JTable table = new JTable(data, columnNames);
CustomTableHeader header = new CustomTableHeader(table);
table.setTableHeader(header);