java 异常处理练习（毕向东）

package Lianxi;
class LanPingException extends Exception
{
  LanPingException(String message)
  {
    super(message);
  }
}
class MaoYanException extends Exception
{
  MaoYanException(String message)
  {
    super(message);
  }
}
class NoPlanException extends Exception
{
  NoPlanException(String message)
  {
    super(message);
  }
}
class Computer
{
  private int state= 3;
  public void run()throws LanPingException,MaoYanException
  {
    if(state==2)
       throw new LanPingException("蓝屏了");
    if(state==3)
       throw new MaoYanException("冒烟了");
    System.out.println("电脑运行");
  }
  public void reset()
  {
    state=1;
    System.out.println("电脑重启");
    
  }
}
class Teacher
{
  private String name;
  private Computer cmpt;
  Teacher(String name)
  {
    this.name = name;
    cmpt = new Computer();
  }
  public void prelect()throws NoPlanException
  {
    try
    {
      cmpt.run();
      
    }
    catch (LanPingException e)
    {
      cmpt.reset();
      
    }
    catch (MaoYanException e)
    {
      test();
       throw new NoPlanException("课时无法继续"+e.getMessage());
       
    }
    System.out.println("讲课");
  }
  public void test()
  {
    System.out.println("lianxi");
  }
}
public class Demo001 {
  public static void main(String [] args)
  {
    Teacher t = new Teacher("张老师");
    try
    {
      t.prelect();
    }
    catch(NoPlanException e) 
    {
      System.out.println(e.toString());
      System.out.println("换老师，或者换电脑或者放假");
    }
  }


}