[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);

}
}