Java异常抛出及try，catch应用实例

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

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

class Computer
{
    private int state=2;
    public void run()throws lanpingException,maoyanException
    {
        if(state==1)
        {
            throw new lanpingException("lanping!!!");
        }
        if(state==2)
        {
            throw new maoyanException("maoyan!!!");
        }
        System.out.println("run bat");
    }
    public void reset()
    {
        state=0;
        System.out.println("computer reset!");
    }
}

class Teacher
{
    private String name;
    private Computer comp;
    Teacher(String name)
    {
        this.name=name;
        comp=new Computer();
    }
    public void prelect()throws maoyanException
    {
        try
        {
            comp.run();
            System.out.println(name+" speak");
        }
        catch(lanpingException e)
        {
            System.out.println(e.toString());
            comp.reset();
            prelect();
        }
        catch(maoyanException e)
        {
            System.out.println(e.toString());
            test();
            throw e;
        }
    }
    public void test()
    {
        System.out.println("test yourself!");
    }
}

class Kandra
{
    public static void main(String[] args)
    {
        Teacher pp=new Teacher("cao");
        try
        {
            pp.prelect();
            
        }
        catch(maoyanException e)
        {
            System.out.println("......");
        }
    }
}