[OCAJP]自訂例外

Given the following code for the classes MyException and Test:

public class MyException extends RuntimeException{
    
}

public class Test {

    public static void main(String[] args) {
        try {
            method1();
        } catch (MyException ne) {
            System.out.print("A");
        }
    }

    public static void method1() { // line n1
        try {
            throw Math.random() > 0.5 ? new MyException() : new RuntimeException();
        } catch (RuntimeException re) {
            System.out.print("B");
        }
    }
}

What is the result?

A.

B.

C.

D.

E. A compile time error occurs at line n1

題解

MyException是RuntimeException的一種，因此第13行無論拋出MyException還是RuntimeException，都會在第14行被catch接住，而輸出「B」。