[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);


  }
}