netbean向导创建的桌面应用程序怎么重写paint，怎么调用repaint

Question

用NETBEAN向导新建了一个桌面应用程序，但是不知道怎么调用paint()函数。repaint()函数是用this.getFrame().repaint()方式调用的，但貌似没调用我自己写的paint()，应该是没有重写成功，因为不是很了解FrameView,所以还望论坛里的前辈们帮我解答一下，谢谢！

Answer 1

不知道netbean创建的程序是怎么样的，但是你创建的是
桌面应用程序的话，应该有JFrame或者JPanel类的子类吧，
你在这个类里重写就是，去查一查文档注意不要写错了

Answer 2

代码如下：
public class PaintPadView extends FrameView {//继承FrameView
    ....
    public PaintPadView(SingleFrameApplication app) {//构造
        ....
    }
    public void paint(Graphics g) {//重写paint()
        ....
    }
    public void update(Graphics g) {
        paint(g);
    }
    private void jPanel3MouseDragged(java.awt.event.MouseEvent evt) {
        ....
        this.getFrame().repaint();//调用repaint()
    }
}
paint()无法调用

Answer 3

public class PaintPadView extends FrameView {
    //0-画笔 1-橡皮 2-多边形 3-直线 4-圆 5-矩形
    protected int toolFlag = 0;
    protected int x = -1;
    protected int y = -1;
    protected Vector paintInfo = new Vector();
    protected Color c = new Color(0, 0, 0);
    protected BasicStroke size = new BasicStroke(con, BasicStroke.CAP_BUTT, BasicStroke.JOIN_BEVEL);
    public PaintPadView(SingleFrameApplication app) {
        super(app);
        initComponents();
        ResourceMap resourceMap = getResourceMap();
        int messageTimeout = resourceMap.getInteger("StatusBar.messageTimeout");
        messageTimer = new Timer(messageTimeout, new ActionListener() {            public void actionPerformed(ActionEvent e) {
                statusMessageLabel.setText("");
            }
        });
        messageTimer.setRepeats(false);
        int busyAnimationRate = resourceMap.getInteger("StatusBar.busyAnimationRate");
        for (int i = 0; i < busyIcons.length; i++) {
            busyIcons[i] = resourceMap.getIcon("StatusBar.busyIcons[" + i + "]");
        }
        busyIconTimer = new Timer(busyAnimationRate, new ActionListener() {            public void actionPerformed(ActionEvent e) {
                busyIconIndex = (busyIconIndex + 1) % busyIcons.length;
                statusAnimationLabel.setIcon(busyIcons[busyIconIndex]);
            }
        });
        idleIcon = resourceMap.getIcon("StatusBar.idleIcon");
        statusAnimationLabel.setIcon(idleIcon);
        progressBar.setVisible(false);        // connecting action tasks to status bar via TaskMonitor
        TaskMonitor taskMonitor = new TaskMonitor(getApplication().getContext());
        taskMonitor.addPropertyChangeListener(new java.beans.PropertyChangeListener() {            public void propertyChange(java.beans.PropertyChangeEvent evt) {
                String propertyName = evt.getPropertyName();
                if ("started".equals(propertyName)) {
                    if (!busyIconTimer.isRunning()) {
                        statusAnimationLabel.setIcon(busyIcons[0]);
                        busyIconIndex = 0;
                        busyIconTimer.start();
                    }
                    progressBar.setVisible(true);
                    progressBar.setIndeterminate(true);
                } else if ("done".equals(propertyName)) {
                    busyIconTimer.stop();
                    statusAnimationLabel.setIcon(idleIcon);
                    progressBar.setVisible(false);
                    progressBar.setValue(0);
                } else if ("message".equals(propertyName)) {
                    String text = (String) (evt.getNewValue());
                    statusMessageLabel.setText((text == null) ? "" : text);
                    messageTimer.restart();
                } else if ("progress".equals(propertyName)) {
                    int value = (Integer) (evt.getNewValue());
                    progressBar.setVisible(true);
                    progressBar.setIndeterminate(false);
                    progressBar.setValue(value);
                }
            }
        });
    }    public void update(Graphics g) {
        System.out.println("In update");
        paint(g);
    }    public void paint(Graphics g) {//待完善
        Graphics2D g2d = (Graphics2D) g;
        Point p1, p2;
        int n = paintInfo.size();        System.out.println("In paint");
        for (int i = 0; i < n - 1; i++) {
            p1 = (Point) paintInfo.elementAt(i);
            p2 = (Point) paintInfo.elementAt(i + 1);
            size = new BasicStroke(p1.boarder, BasicStroke.CAP_BUTT,
                    BasicStroke.JOIN_BEVEL);            g2d.setColor(p1.col);
            g2d.setStroke(size);
            if (p1.tool == p2.tool) {
                switch (p1.tool) {
                    case 0:// 画笔
                        Line2D line1 = new Line2D.Double(p1.x, p1.y, p2.x, p2.y);
                        g2d.draw(line1);
                        break;
                    case 1:// 橡皮
                        g.clearRect(p1.x, p1.y, p1.boarder, p1.boarder);
                        break;
                    case 2://多边形
                        break;
                    case 3:// 画直线
                        Line2D line2 = new Line2D.Double(p1.x, p1.y, p2.x, p2.y);
                        g2d.draw(line2);
                        break;
                    case 4:// 画圆
                        Ellipse2D ellipse = new Ellipse2D.Double(p1.x, p1.y, Math.abs(p2.x - p1.x), Math.abs(p2.y - p1.y));
                        g2d.draw(ellipse);
                        break;
                    case 5:// 画矩形
                        Rectangle2D rect = new Rectangle2D.Double(p1.x, p1.y, Math.abs(p2.x - p1.x), Math.abs(p2.y - p1.y));
                        g2d.draw(rect);
                        break;
                    default:
                }// end switch
            }// end if
        }// end for
    }
private void jPanel3MousePressed(java.awt.event.MouseEvent evt) {
        Point p2;
        System.out.println("press" + toolFlag);
        switch (toolFlag) {
            case 3:// 直线
                x = (int) evt.getX();
                y = (int) evt.getY();
                p2 = new Point(x, y, c, toolFlag, con);
                paintInfo.addElement(p2);
                break;
            case 4: // 圆
                x = (int) evt.getX();
                y = (int) evt.getY();
                p2 = new Point(x, y, c, toolFlag, con);
                paintInfo.addElement(p2);
                break;
            case 5: // 矩形
                x = (int) evt.getX();
                y = (int) evt.getY();
                p2 = new Point(x, y, c, toolFlag, con);
                paintInfo.addElement(p2);
                break;
            default:
        }
    }    private void jPanel3MouseDragged(java.awt.event.MouseEvent evt) {
        Point p1;
        switch (toolFlag) {
            case 0:// 画笔 
            case 1:// 橡皮
                System.out.println("drag" + toolFlag);
                x = (int) evt.getX();
                y = (int) evt.getY();
                p1 = new Point(x, y, c, toolFlag, con);
                paintInfo.addElement(p1);
                this.getFrame().repaint();
                break;
            default:
        }
    }
代码没贴完，太长了，选了主要的

Answer 4

import org.jdesktop.application.FrameView;
FrameView 来自上面的包

Answer 5

怎么用frameview啊，貌似不是标准JDK里的东西，怎么repaint()