class Teacher
{
  private Computer cmp;
  public void shangKe()throws NoPlanException      /*聲明異常*/
  {
    cmp=new Computer();
    try
    {
      cmp.run();
    }
    catch(LanPingException e)               /*電腦捕獲處理藍屏的異常*/                   
    {
      cmp.recst();
    }
    catch(MaoYanException e)                /*電腦捕獲處理電腦冒煙的異常*/
    {
      throw new NoPlanException("上課無法繼續(xù),因為"+e.getMessage());    /*電腦無法處理這個異常，繼續(xù)把這個異常拋給老師來處理*/   
    }
    
    System.out.println("老師上課");                /*沒有異常，老師就正常上課*/
  }
}
class LanPingException extends Exception               /*自定義藍屏異常*/
{
  LanPingException(String m)
  {
    super(m);
  }
}

class MaoYanException extends Exception             /*自定義電腦冒煙異常*/
{
  MaoYanException(String m)
  {
    super(m);
  }
}
class NoPlanException extends Exception             /*自定義老師處理異常*/
{
  NoPlanException(String m)
  {
    super(m);
  }
}

class Computer
{
  private int state=3;           /*不同的異常狀態(tài)選擇*/
  
  public void run()throws LanPingException,MaoYanException
  {
    if(state==2)                     
    {
      throw new LanPingException("電腦藍屏了");        /*符合條件就拋出異常對象*/
    }
    if(state==3)
    {
      throw new MaoYanException("電腦冒煙了");
    }
    System.out.println("電腦運行");
  }
  
  
  public void recst()
  {
    System.out.println("電腦重啟");
  }
}

class ExceptionText
{
  public static void main(String args[])
  {
    Teacher t=new Teacher();
    try
    {
      t.shangKe();
    }
    catch(NoPlanException e)               /*老師捕獲處理電腦冒煙異常*/   
    {
      System.out.println(e.toString());
    }    
  }
}