❌ A. The code will print nothing ❌ B. The code will print "NULL" ❌ C. NullPointerException will be thrown ✅ D. IllegalArgumentException will be thrown ❌ E. Compilation error ❌ F. None of the above
Explanation: In the given code snippet, an Optional is created using the ofNullable method, passing a null reference. Then, the map method is called on the optional, applying the toUpperCase function to the value inside the Optional. Since the value inside the Optional is null, the map function will not be executed, and the Optional will remain empty.
The orElseThrow method is then called, which will throw an IllegalArgumentException if the Optional is empty. In this case, the Optional is indeed empty, as it was created with a null value. Therefore, the code will throw an IllegalArgumentException.
The correct answer is option D) IllegalArgumentException will be thrown.
❌ A. The code will print nothing ❌ B. The code will print "NULL" ❌ C. NullPointerException will be thrown ✅ D. IllegalArgumentException will be thrown ❌ E. Compilation error ❌ F. None of the above
Explanation: In the given code snippet, an Optional is created using the ofNullable method, passing a null reference. Then, the map method is called on the optional, applying the toUpperCase function to the value inside the Optional. Since the value inside the Optional is null, the map function will not be executed, and the Optional will remain empty.
The orElseThrow method is then called, which will throw an IllegalArgumentException if the Optional is empty. In this case, the Optional is indeed empty, as it was created with a null value. Therefore, the code will throw an IllegalArgumentException.
The correct answer is option D) IllegalArgumentException will be thrown.
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