Java基础之异常Exception（5）---小练习

class LanPingException extends Exception
{
LanPingException(String message)
{
super(message);
}
}

class MaoYanException extends Exception
{
MaoYanException(String message)
{
super(message);
}
}

class NoPlanException extends Exception
{
NoPlanException(String msg)
{
super(msg);
}
}

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("练习");
}

}

class ExceptionTest
{
public static void main(String[] args)
{
Teacher t = new Teacher("毕老师");
try
{
t.prelect();
}
catch (NoPlanException e)
{
System.out.println(e.toString());
System.out.println("换老师或者放假");
}

}
}