使用superclass-java进行异常处理

Question

如果我想使用超类来处理异常，我还需要使用try catch来处理异常吗？这是超类的代码和我用来测试它的类。我试图在测试类中使用方法，但我需要添加一个try catch语句来执行我想要的操作。

 public class ExceptionA {




public static int quotient(int numerator, int denominator)
  throws ArithmeticException 
{
  return numerator / denominator; // possible division by zero
} 


}

public class ExceptionTest {


public static void main(String[] args) {


  Scanner scanner = new Scanner(System.in); 
  boolean continueLoop = true;




  do 
 {
     try
     {
         System.out.println("Please enter an integer numerator");
         int numerator = scanner.nextInt();
         System.out.println("Please enter an integer denominator");
         int denominator = scanner.nextInt();

         int result = ExceptionA.quotient(numerator, denominator);
         System.out.printf("%nResult: %d / %d = %d%n", numerator, 
         denominator , result);
         continueLoop = false;
     }
     catch ( ArithmeticException arithmeticException)
     {
         System.err.printf("%nException: %s%n" , arithmeticException);
         System.out.printf("Zero is an invalid denominator. Please try again."
                 + "%n%n");
     }

     } while(continueLoop);

 }
 }

Answer 1

如果方法抛出异常，那么您要么必须编写方法来抛出异常，要么使用try / catch来处理异常。在某些时候，您将不得不使用try / catch，尤其是在您使用main方法调用代码时。