import sun.swing.SwingUtilities2.RepaintListener; //导入依赖的package包/类
@Override
public void addRepaintListener(RepaintManager rm, RepaintListener l) {
    rm.addRepaintListener(l);
}
 

import sun.swing.SwingUtilities2.RepaintListener; //导入依赖的package包/类
@Override
public void removeRepaintListener(RepaintManager rm, RepaintListener l) {
    rm.removeRepaintListener(l);
}
 

import sun.swing.SwingUtilities2.RepaintListener; //导入依赖的package包/类
/**
 * Notify the attached repaint listeners that an area of the {@code c} component
 * has been immediately repainted, that is without scheduling a repaint runnable,
 * due to performing a "blit" (via calling the {@code copyArea} method).
 *
 * @param c the component
 * @param x the x coordinate of the area
 * @param y the y coordinate of the area
 * @param w the width of the area
 * @param h the height of the area
 */
void notifyRepaintPerformed(JComponent c, int x, int y, int w, int h) {
    for (RepaintListener l : repaintListeners) {
        l.repaintPerformed(c, x, y, w, h);
    }
}