What is printed as a result of executing the following code segment? ArrayList p = new ArrayList(); p.add(7); p.add(2); p.add(2); p.remove(2); p.add(1); p.add(2); System.out.printl... What is printed as a result of executing the following code segment? ArrayList p = new ArrayList(); p.add(7); p.add(2); p.add(2); p.remove(2); p.add(1); p.add(2); System.out.println(p);
Understand the Problem
The question is asking what output will be produced by the given Java code segment, which involves manipulating an ArrayList. The key concepts involve understanding how the add and remove methods of an ArrayList work and how the list will be printed after the operations are performed.
Answer
[7, 2, 1, 2]
The final answer is [7, 2, 1, 2].
Answer for screen readers
The final answer is [7, 2, 1, 2].
More Information
The ArrayList p starts with three elements: [7, 2, 2]. The remove(2) call removes the first occurrence of the element '2', resulting in [7, 2]. Then, '1' and '2' are added, making the final list [7, 2, 1, 2].
Tips
A common mistake is misunderstanding the remove() method in ArrayList. The remove(Integer.valueOf(2)) method call differentiates between removing by index and by value and ensures the removal of the first occurrence of the value '2'.
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