第30題
Given:
1. public class SimpleCalc{
2. public int value;
3. public void calculate(){value += 7;}
4. }
And:
1. public class MultiCalc extends SimpleCalc{
2. public void calculate(){value -= 3;}
3. public void calculate(int multiplier){
4. calculate();
5. super.calculate();
6. value *= multiplier;
7. }
8. public static void main(String[] args){
9. MultiCalc calculator = new MultiCalc();
10. calculator.calculate(2);
11. System.out.println("Value is: " + calculator.value);
12. }
13. }
What is the result?
(A) Value is: 8
(B) Compilation fails.
(C) Value is: 12
(D) Value is: -12
(E) The code runs with no output.
F. An exception is thrown at runtime.
寫作批改
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