[20160701]DevideByZeroWithoutNoException——from 《Java How To Program (Early Objects), 10th》

 //一段优美的例子
 import java.util.Scanner;
 import java.util.InputMismatchException;

 public class DevideByZeroWithoutNoException1{
   public static int quotient(int numerator,int denominator)
     throws ArithmeticException
   {
     return numerator/denominator;
   }

   public static void main(String[] args) {
     Scanner scanner=new Scanner(System.in);

     boolean continueLoop=true;

     do {
      try
      {
        System.out.print("please enter an int numerator:");
        int  numerator=scanner.nextInt();

        System.out.print("please enter an in denominator:");
        int  denominator=scanner.nextInt();

        int result=quotient(numerator,denominator);

        System.out.printf("%nResult:%d/%d=%d%n",numerator,denominator,result);

        continueLoop=false;

      }

     catch (InputMismatchException inputMismatchException)
     {
        System.err.printf("%nException:%s%n",inputMismatchException);
        scanner.nextLine();
        System.out.printf("%nYou must enter an integer number.Please try again.%n%n");
     }

     catch (ArithmeticException arithmeticException)
     {
       System.err.printf("%nException:%n%s",arithmeticException);
       System.out.printf("%nZero is an invalid denom inator!Please try again.%n%n");
     }

   } while (continueLoop);

   }
 }