文字的定时移动和画板的建立.java

 

public class Test extends JFrame {
 private static DrawPane movingPane = new DrawPane();//画板
 Test() {
  setTitle("java练习");
  setSize(500, 500);
  getContentPane().add(movingPane);//如果这句改成getContentPane().add(new DrawPane());那么将只有绘图功能
  setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

  addWindowListener(new WindowAdapter() {// 窗口事件的处理；

   public void windowClosing(WindowEvent e) {
    System.exit(0);// JOptionPane.showConfirmDialog(null, "正在关闭窗口！");// TODO
    // Auto-generated method stub
   }
  });
 }

 public static void main(String[] args) {
  Test test = new Test();
  Thread moving = new Thread(new myThread(10,movingPane));
  moving.start();
  test.setVisible(true);
  
 }
}
     class DrawPane extends JPanel {//定义画板类；

  private Point start = new Point();
  private Point end = new Point();
        private boolean rightButton;
        private boolean leftButton;
        int x;//定义移动文字的横坐标；
        public void setX(int x){
         this.x=x;
        }
  DrawPane() {
   // setTitle("画板");
       setVisible(true);
       addMouseListener(new MouseAdapter() {// 鼠标事件处理；
    public void mousePressed(MouseEvent e) {
     if (e.getButton()==MouseEvent.BUTTON1) {
     start.x = e.getX();// TODO Auto-generated method stub
     start.y = e.getY();
     leftButton=true;//标记左键被按，用于MouseMotionListener;
     }
     else if(e.getButton()==MouseEvent.BUTTON3){
      rightButton=true;
     }
    }
    public void mouseReleased(MouseEvent e) {
     if(e.getButton()==MouseEvent.BUTTON1)
      leftButton=false;
     else if(e.getButton()==MouseEvent.BUTTON3)
      rightButton=false;
    }
   });
   addMouseMotionListener(new MouseMotionAdapter() {

    @Override
    public void mouseDragged(MouseEvent e) {
     Graphics g = getGraphics(); // 获取画笔；
     if (leftButton) {
      g.setColor(Color.RED);
      g.drawLine(start.x, start.y, e.getX(), e.getY());
      start.x = e.getX();// TODO Auto-generated method stub
      start.y = e.getY();
     }
     
      else if(rightButton)
      {
       g.setColor(getBackground());
       g.fillOval(e.getX()-5, e.getY()-5, 10, 10);
       }//做一个椭圆作为橡皮察，抹掉已画的线条
       g.dispose();
    }

   });
  }

  public void paintComponent(Graphics g) {//重写paint();
    super.paintComponent(g);
    g.setColor(Color.RED);
    g.drawString("Hello!",x,50);
    System.out.println(" FUCK ");
  }
 }
     class myThread implements Runnable {
            private int x;
            private DrawPane moving;
   myThread(int x,DrawPane movingPane){
    this.x=x;
       this.moving=movingPane;
   }
   public void run() {
    while(true){
     try {
      Thread.sleep(1000);
      
      if(x<=moving.getSize().width){
       x+=10;
      }
      else{
       x = 0;
      }
      moving.setX(x);
      moving.repaint();
      
     }catch(InterruptedException e){}
     }
    }
    
   }//定义线程

原文链接： http://blog.csdn.net/weiyirong/article/details/6668569