DD

class FuShuException1 extends RuntimeException
{
	FuShuException1(String msg)
	{		
		super(msg);
	}
}

class Demo3
{
	int div(int a,int b) throws ArithmeticException
	{
		if(b<0)
			throw new FuShuException1("出现除数为负数了");
		if(b==0)
			throw new ArithmeticException("被零除了");
		return a/b;
	}
}
public class ExceptionDemo3 {
	public static void main(String[] args) //throws Exception
	{
		Demo3 d=new Demo3();
			int x=d.div(3, -9);
			//此处抛出  new AritchmeticException()
			
			System.out.println("x="+x);
			System.out.println("This over!");
	}
}

/*
class Person
{
	public void checkName(String name)
	{
		//if(name.equals("萝莉")) //NullPointerException
		if("萝莉".equals(name)) //if(name!=null&&name.equals("萝莉"))
			System.out.println("Yes");
		else 
			System.out.println("No");
	}
}

main()
{
	Person p=new Person();
	p.checkName(null);
}