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Is there any way to copy or convert a vector to arraylist in Java?

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3 Answers

up vote 30 down vote accepted

Yup - just use the constructor which takes a collection as its parameter:

Vector<String> vector = new Vector<String>();
// (... Populate vector here...)
ArrayList<String> list = new ArrayList<String>(vector);

Note that it only does a shallow copy.

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Thanks Jon! Very Helpful! – Exile Dec 15 '10 at 16:17
up vote 1 down vote

i´m not sure if it is length() or size().... but the idea is the next:

ArrayList<Object> a;

for(int i = 0;i < Vector.length() ; i++)

    a.add(Vector.elementAt(i); // Again... i´m not sure if this is elementAt() or get()

Vector.finalize();
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Why finalize? – Miserable Variable Oct 23 '12 at 0:26
up vote 1 down vote

I just wrote a class to do the same thing, but is more flexible as it will accept Objects accordingly. 

public class ExteriorCastor {
    public static  ArrayList vectorToArrayList(Vector vector){
        if (vector == null){return null;}
        return new ArrayList<Object>(vector);
    }
}
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