how to convert Vector to an int[]?

Question

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How to convert List<Integer> to int[] in Java?

Is there some method to convert a Vector< Integer> to an int[]?

Thanks

`Vector` can't (and doesn't) exist in Java. – Joachim Sauer Apr 18 '11 at 12:57 — Joachim Sauer, Apr 18 '11 at 12:57
Thank you Joachim Sauer. Vector does exists. – Alex Moreno Apr 18 '11 at 13:04 — Alex Moreno, Apr 18 '11 at 13:04

score 0 · Accepted Answer · answered Apr 18 '11 at 12:58

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toArray() will do the conversion for you. Check the link for the javadoc of all the methods Vector has. This will be the boxed Integer, not int, but you can work from there.

answered Apr 18 '11 at 12:58

unholysampler

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score 0 · Answer 2 · answered Apr 18 '11 at 12:58

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Integer[] sl = (Integer[]) myVector.toArray(new Integer[0]);

answered Apr 18 '11 at 12:58

MarkPowell

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score 0 · Answer 3 · answered Apr 18 '11 at 13:15

Vector uses objects and not primary types. so you can only convert to an Object[], to convert to a primary type array you'd have to use an additional step.

with no further comments on what's the point of your code, I would say that Integer[] would acomplish the same thing

score 0 · Answer 4 · answered Apr 18 '11 at 13:53

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You can use a loop to copy a vector into an int[]

Vector<Integer> vector = ....
int count = 0, ints[] = new int[vector.size()];
for(int i: vector) ints[count++] = i;

answered Apr 18 '11 at 13:53

Peter Lawrey

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how to convert Vector to an int[]?

4 Answers4