package?experiment5;

class?OnlyOneException?extends?Exception{
	OnlyOneException（）{
		super（）;
	}
}


class?NoOprandException?extends?Exception{
	NoOprandException（）{
		super（）;
	}
}


public?class?LX2?{

	/**
	?*?@param?args
	?*/
	public?static?void?main（String[]?args）?throws?OnlyOneExceptionNoOprandException{
		try{
			
			if（args.length==1）
				throw