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Oracle Certified Professional: Java SE Developer 1Z0-831 (Java SE 25) · Domain 5: Working with arrays and collections

List.remove(int) vs remove(Object) with Integer lists

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Last reviewed September 25, 2026 · Leer en español

The List interface has two methods named remove. E remove(int index) removes the element at a position and returns it. boolean remove(Object o) removes the first element equal to o and returns true if it found one. With a List<String> there is no confusion, but with a List<Integer> a call like list.remove(1) could mean either, and the exam loves this trap.

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