扩展JPanel类的程序不访问方法plotComponent()

Question

扩展JPanel类的程序不访问方法plotComponent()这是JFramepackage client.connection;import java.awt.Dimension;import java.io.ObjectInputStream;import java.io.ObjectOutputStream;import javax.swing.JFrame;class DrawFrameRemoteControl extends JFrame{     private DrawPanelRemoteControl imagePanel;     private ClientRemoteControlConnection clientRemoteControlConnection;     private ObjectInputStream clientInputStream;     private ObjectOutputStream clientOutputStream;     private Dimension imageDimension;     private Dimension serverDimension;     public DrawFrameRemoteControl(Dimension imageDimension,ClientRemoteControlConnection clientRemoteControlConnection,ObjectInputStream clientInputStream,ObjectOutputStream clientOutputStream,Dimension serverDimension)     {         super("Remote Desktop Control");         this.clientRemoteControlConnection=clientRemoteControlConnection;         this.clientInputStream=clientInputStream;         this.clientOutputStream=clientOutputStream;         this.imageDimension=imageDimension;         this.serverDimension=serverDimension;         imagePanel=new DrawPanelRemoteControl(imageDimension);         add(imagePanel);         setSize(imageDimension.width,imageDimension.height);         setResizable(false);         setDefaultCloseOperation(EXIT_ON_CLOSE);         setVisible(true);         setLocationRelativeTo(null);     }     void drawNewImageGrayscale(byte[] array)     {         imagePanel.setNewImageGrayscale(array);         imagePanel.repaint();     }}我试过调试代码，尽管imagePanel.repaint()正在多次执行，程序永远不会到达paintComponent()方法DrawPanelRemoteControl班级，等级。有人能告诉我为什么会发生这种事吗？是否与imageDimension反对？补充资料：在……里面main()方法，aDrawFrameRemoteControl对象被创建，并且它的drawNewImageGrayscale(byte[] arr)方法正在从main()每一秒。