class Demo
{
int div(int a ,int b)throws FuShuException
{
if(b<0)
throw new FuShuException();
return a/b;
}
}
class ExceptionDemo3
{
public static void main(String[] args)
{
Demo d = new Demo();
try
{
int x = d.div(4,1);
System.out.println("x="+x);
}
catch (FuShuException e)
{
System.out.println(e.toString());
System.out.println("除数出现负数了");
}