如何在绘制之后重新绘制JPanel？

@Override
protected void paintComponent(Graphics g) {
    super.paintComponent(g);
    // 添加自定义的绘制逻辑
    // ...
}

jPanel.repaint();

@Override
protected void paintComponent(Graphics g) {
    super.paintComponent(g);
    // 清除之前的绘制内容
    // ...
    // 添加自定义的绘制逻辑
    // ...
}

public class MyPanel extends JPanel {
    private DataModel dataModel;

    public void setDataModel(DataModel dataModel) {
        this.dataModel = dataModel;
    }

    @Override
    protected void paintComponent(Graphics g) {
        super.paintComponent(g);
        // 根据数据模型的状态进行绘制
        // ...
    }
}