How can you convert a List back to a primitive int[] array?

Solution:Step 1: Understand conversion from List to primitive arrayList<Integer> cannot be cast directly to int[].Step 2: Use Java streams for conversionUsing stream().mapToInt(Integer::intValue).toArray() converts Integer list to int array efficiently.Final Answer:Use stream().mapToInt(Intege

[Solved] How can you convert a List<Integer> back to a primitive int[] array? — Ans: Use stream().mapToInt(Integer::intValue).toArray() | Java

Java - Wrapper Classes

How can you convert a List<Integer> back to a primitive int[] array?

AUse Arrays.copyOf() on the List

BCast List<Integer> to int[] directly

CUse toArray() method on List<Integer>

DUse stream().mapToInt(Integer::intValue).toArray()

Step-by-Step Solution

Solution:

Step 1: Understand conversion from List to primitive array
List<Integer> cannot be cast directly to int[].
Step 2: Use Java streams for conversion
Using stream().mapToInt(Integer::intValue).toArray() converts Integer list to int array efficiently.
Final Answer:
Use stream().mapToInt(Integer::intValue).toArray() -> Option D
Quick Check:
Streams convert List to int[] correctly [OK]

Quick Trick: Use streams to convert List to int[] [OK]

Common Mistakes:

Trying to cast List to int[]
Using toArray() which returns Integer[]
Using Arrays.copyOf on List

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How can you convert a List<Integer> back to a primitive int[] array?

Step 1: Understand conversion from List to primitive array

Step 2: Use Java streams for conversion

Final Answer:

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