Do I have to push my elements one by one? I tried something like
String[] array;
array=...
Vector<String> vector = new Vector<String>(array);
but my eclipse marks this as an error.
3 Answers
Vector doesn't have a constructor that accepts an array directly.
Assuming that array is of type String[], you could do
Vector<String> vector = new Vector<String>(Arrays.asList(array));
Better to use ArrayList as it doesn't have the overhead of having synchronized methods. You could use
List<String> list = new ArrayList<>(Arrays.asList(array));
This will produce a mutable collection also.
2 Comments
Buhake Sindi
Provided that
array is a String.
Steve Kuo
Or better yet
List<String> list = new Vector<String>(Arrays.asList(array));, or even better yet List<String> list = new ArrayList<String>(Arrays.asList(array));That can't work, since, as the documentation shows, there is no Vector constructor taking an array as argument.
If you just want a non-modifiable list, use
List<String> list = Arrays.asList(array);
If you really want a Vector (but you should use ArrayList instead, because Vector is obsolete), use
Vector<String> vector = new Vector<String>(Arrays.asList(array));
Comments
I'm not 100% sure what you mean by 'one by one'. If you want to add an existing collection to a Vector, you could use this.
If you want to do it one by one, you need to iterate through the items, and call Vector's 'add' method.
for(String item: array) {
vector.add(item);
}
1 Comment
Elderry
I was trying to avoid doing it one by one, thanks anyway:)
Vectoris mostly discouraged nowadays. You should probably preferArrayList.