timer60.java

timer就是一个定时器

/*Timer60.java*/
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;

public class Timer60 extends JPanel
{ protected void init()
  { tmt=null;
    if(cntl==null)
      cntl=new TimerControls(this,Color.cyan);
    if(face==null)
      face=new TimerFace(Color.blue);
    face.set(m,s);
    myBorder();
    setLayout(new BorderLayout());
    add(face,BorderLayout.CENTER);
    add(cntl,BorderLayout.SOUTH);
    if(tk==null)
       tk=Toolkit.getDefaultToolkit();
  }
  private void myBorder()
  { setBorder(BorderFactory.createCompoundBorder
     ( BorderFactory.createEmptyBorder(20,10,10,20),
       BorderFactory.createLineBorder(Color.blue)));
  }
  public int getMinute(){ return m; }
  public int getSecond(){ return s; }
  public void set(int min,int sec)
  {    if(min<0|| sec<0) return;
       pause();
       m=Math.min(min,60);
       if(m==60) s=0;
       else s=Math.min(sec,59);
       face.set(m,s);  //upadate display
  }
  public void countDown()
  {    tick();           //down one second
       face.set(m,s);    //redisplay
  }
  protected void tick()
  {    if(s<=0)
       { if(m<=0)
          {    ring();   //buzzer
               pause();
               cntl.startButton();
               return;
          }
         s=59;m--;
       }
       else s--;
       return;
  }
  protected void ring()
  {  try
     { tk.beep();
       Thread.sleep(400);
       tk.beep();
       Thread.sleep(400);
       tk.beep();
     }catch(InterruptedException e) {}
  }
  public boolean beginEnd()
  { if(tmt==null)
    { if(s<=0&&m<=0) return false;
      tmt=new Quartz(this);
      tmt.tref(tmt);
      tmt.start();
      return true;
    }
    pause();
    return false;
  }
  public void pause()
  { if(tmt!=null)
    {tmt.tref(null);tmt=null;}
  }
  protected void go(JFrame win)
  { win.setContentPane(this);
    win.addWindowListener(new WindowHandler(win));
    win.setSize(220,136);
    win.validate();
    win.setVisible(true);
  }
  private static final class WindowHandler extends WindowAdapter
  {
    public WindowHandler(JFrame f) {fr=f;}
    public void windowClosing(WindowEvent e)
    { fr.setVisible(false);
      fr.dispose();
      System.exit(0);
    }
    private JFrame fr;
  }
  public static void main(String[] args)
  { Timer60 tm=new Timer60();
    tm.init();
    tm.go(new JFrame("Timer"));
  }
  protected TimerFace face;
  protected TimerControls cntl;
  protected int m=0,s=0;            
  protected Quartz tmt=null;        
  protected Toolkit tk;             
}