public abstract class AbstractTest { public int getNum() { return 45; } public abstract class Bar { public int getNum() { return 38; } } public static void main(String[] args) { AbstractTest t = new AbstractTest() { public int getNum() { return 22; } }; AbstractTest.Bar f = t.new Bar() { public int getNum() { return 57; } }; System.out.println(f.getNum() + " " + t.getNum()); } }

technology programming languages

  1. 57 22

  2. 45 38

  3. 45 57

  4. D. An exception occurs at runtime

Show answer
Correct Option: B

AI Explanation

To answer this question, let's go through each option to understand why it is correct or incorrect:

Option A) 57 22 - This option is incorrect because the variable f is an instance of the inner class Bar, which overrides the getNum() method to return 57. However, the variable t is an instance of the anonymous subclass of AbstractTest, which overrides the getNum() method to return 22. Therefore, the correct output for f.getNum() and t.getNum() is 45 and 38, respectively.

Option B) 45 38 - This option is correct because the variable f is an instance of the inner class Bar, which inherits the getNum() method from the outer class AbstractTest and returns 38. The variable t is an instance of the anonymous subclass of AbstractTest, which overrides the getNum() method to return 22. Therefore, the correct output for f.getNum() and t.getNum() is 45 and 38, respectively.

Option C) 45 57 - This option is incorrect because the variable f is an instance of the inner class Bar, which inherits the getNum() method from the outer class AbstractTest and returns 38. The variable t is an instance of the anonymous subclass of AbstractTest, which overrides the getNum() method to return 22. Therefore, the correct output for f.getNum() and t.getNum() is 45 and 38, respectively, not 57.

Option D) An exception occurs at runtime - This option is incorrect because there are no exceptions thrown in the given code. The code will execute without any errors and will print the output.

The correct answer is B. The output of the code will be "45 38" because f.getNum() returns 45 and t.getNum() returns 38.

Find more quizzes: