设置timer让label一秒钟变一次位置，却不成功（急）

/*
 * Scene3.java
 *
 * Created on 2005年11月20日, 下午2:41
 */package JAVA_2D;/**
 *
 * @author  Administrator
 */
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
public class Scene3 extends JFrame{
    static int bx=90; 
    static int by=90;
    static int OvalW=60;
    static int OvalH=60;
    static int r=30;
    static int blank=5;
    static int lLength=20;
    static int moveL=(int)(1.4*blank);
    static int moveC=(int)(0.7*lLength/2);
    static int currentX=850;
    static int currentY=180;
    final static int braeStartX=492;
    final static int braeStartY=620;
    static int braeMX=50;
    static int braeMY=45;
    static JLabel dog=new JLabel();
    static int x=0;
    static int y=0;
    /** Creates a new instance of Scene3 */
    public Scene3() {
        this.setSize(new Dimension(900,650));
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        this.getContentPane().setLayout(null);
        this.setVisible(true);
        //dog.setBounds(braeStartX,braeStartY,120,130);
        dog.setIcon(new ImageIcon(getClass().getResource("images/21.gif")));
        //this.getContentPane().add(dog);
        getContentPane().setBackground(Color.white);
        //myInit();
    }
    /*public void myInit() {
        this.getContentPane().setLayout(null);
        //dog.setBounds(braeStartX,braeStartY,120,130);
        dog.setIcon(new ImageIcon(getClass().getResource("images/21.gif")));
        this.getContentPane().add(dog);
        getContentPane().setBackground(Color.white);
       
      
    }*/
    public void paint(Graphics g) {
        super.paint(g);
        Graphics2D g2=(Graphics2D)g;
        g2.setColor(Color.red);
        g2.fillOval(bx,by,OvalW,OvalH);
        g2.setColor(Color.yellow);
        g2.drawLine((bx-moveL)-moveC,(by-moveL)+moveC,(bx-moveL)+moveC,(by-moveL)-moveC);//左上45度
        g2.drawLine((bx-moveL)+moveC+lLength,(by-moveL)-moveC,(bx-moveL)+moveC+lLength+lLength,(by-moveL)-moveC);//上横线
        g2.drawLine((bx+2*r+moveL)+moveC,(by-moveL)+moveC,(bx+2*r+moveL)-moveC,(by-moveL)-moveC);//右上45度
        g2.drawLine((bx-moveL)+moveC+lLength,(by+2*r+moveL)+moveC,(bx-moveL)+moveC+lLength+lLength,(by+2*r+moveL)+moveC);//下横线
        g2.drawLine((bx-moveL)-moveC,(by+2*r+moveL)-moveC,(bx-moveL)+moveC,(by+2*r+moveL)+moveC);//左下45度
        g2.drawLine((bx+2*r+moveL)+moveC,(by+2*r+moveL)-moveC,(bx+2*r+moveL)-moveC,(by+2*r+moveL)+moveC);//右下45度
        g2.drawLine((bx-moveL)-moveC,(by-moveL)+moveC+lLength,(bx-moveL)-moveC,(by-moveL)+moveC+lLength+lLength);//左竖线
        g2.drawLine((bx+2*r+moveL)+moveC,(by-moveL)+moveC+lLength,(bx+2*r+moveL)+moveC,(by-moveL)+moveC+lLength+lLength);//右竖线
         //第一个三角形的顶点
        int treeTopX1=(bx-moveL)+moveC+lLength+lLength/2;
        int treeTopY1=(by+2*r+moveL)+moveC+2*5*lLength;
        int i=1;
        int triangleL=(int)(0.7*2*i*lLength);
        //第一个三角形的点
        int xPoints[]={treeTopX1,treeTopX1-triangleL,treeTopX1+triangleL};
        int yPoints[]={treeTopY1,treeTopY1+triangleL,treeTopY1+triangleL};
        g2.setColor(Color.green);
        g2.fillPolygon(xPoints, yPoints, 3);
        //第二个三角形的顶点
        int treeTopX2=treeTopX1;
        int treeTopY2=treeTopY1+triangleL;
        i++;
        triangleL=(int)(0.7*2*i*lLength);
        //第二个三角形的点
        int xPoints1[]={treeTopX2,treeTopX2-triangleL,treeTopX2+triangleL};
        int yPoints1[]={treeTopY2,treeTopY2+triangleL,treeTopY2+triangleL};
        g2.fillPolygon(xPoints1, yPoints1, 3);
        //第三个三角形的顶点
        int treeTopX3=treeTopX2;
        int treeTopY3=treeTopY2+triangleL;
        i++;
        triangleL=(int)(0.7*2*i*lLength);
        //第三个三角形的点
        int xPoints2[]={treeTopX3,treeTopX3-triangleL,treeTopX3+triangleL};
        int yPoints2[]={treeTopY3,treeTopY3+triangleL,treeTopY3+triangleL};
        g2.fillPolygon(xPoints2, yPoints2, 3);
        g2.setColor(Color.GRAY);
        //树根
        g2.fillRect(treeTopX3-triangleL+triangleL/4*3,treeTopY3+triangleL,triangleL/2, triangleL/2);
        g2.setColor(Color.black);
        //g2.drawLine(445,650,985,200);
        for(i=0;i<11;i++) {
            //for(int j=0;j<11;j++) {
                g2.drawLine(braeStartX+i*braeMX,braeStartY-i*braeMY,braeStartX+10*braeMX,braeStartY-i*braeMY);
                g2.drawLine(braeStartX+i*braeMX,braeStartY-i*braeMY,braeStartX+i*braeMX,braeStartY-i*braeMY+i*braeMY);
               
            //}
        }
        g2.drawLine(braeStartX,braeStartY,braeStartX+i*braeMX,braeStartY-i*braeMY);
    }
    /*public void moveDog() {
        javax.swing.Timer t=new javax.swing.Timer(1000,new 
        ActionListener()
        {
        public void actionPerformed(ActionEvent event)
        {
            int x=braeMX-60,y=braeMY+130;
            x=x+braeMX;
            y=y+braeMY;
            dog.setBounds(x,y,120,130);         }
        }
        );
        t.start();
    }*/
    public static void main(String args[]) {
        Scene3 scene3=new Scene3();
        scene3.getContentPane().add(dog);
        //scene3.setBounds(0, 0, 900, 650);
        javax.swing.Timer t=new javax.swing.Timer(1000,new 
        ActionListener()
        {
        public void actionPerformed(ActionEvent event)
        {
            x=braeStartX-60;
            y=braeStartY-133;
            int n=0;
            int count=0;
            /*if(count%2==0) {
                n=n+5;
            }
            else {
                n=n-3;
            }*/
            x=x+50;
            y=y-50;
            //count++;
            /*if(count==7) {
                x=braeStartX-60;
                y=braeStartY-150;
            }*/
            dog.setBounds(x,y,120,130);         }
        }
        );
        t.start();
        //scene3.getContentPane().setBackground(Color.white);
        
            }
}
以上是源程序，在这里先谢谢各位拉。