This is an example of how to append all elements of a Collection to a Vector. We are using an ArrayList as a Collection implementation. Appending all elements of an ArrayList to a Vector implies that you should:
- Create a new Vector.
- Populate the vector with elements, with
add(E e)API method of Vector. - Create a new ArrayList.
- Populate the arrayList with elements, with
add(E e)API method of ArrayList. - Invoke
addAll(Collection c)API method of Vector. It appends all of the elements in the specified arrayList to the end of this Vector, in the order that they are returned by the arrayList’s Iterator. The behavior of this operation is undefined if the arrayList is modified while the operation is in progress.
Let’s take a look at the code snippet that follows:
package com.javacodegeeks.snippets.core;
import java.util.Vector;
import java.util.ArrayList;
public class AppendAllElementsOfCollectionToVector {
public static void main(String[] args) {
// Create a Vector and populate it with elements
Vector vector = new Vector();
vector.add("element_1");
vector.add("element_2");
vector.add("element_3");
// Create another collection e.g. ArrayList and populate it with elements
ArrayList arrayList = new ArrayList();
arrayList.add("arrayList_element_1");
arrayList.add("arrayList_element_2");
// Append all elements of ArrayList to Vector using the boolean addAll(Collection c) operation
vector.addAll(arrayList);
System.out.println("Elements in Vector :");
for(int i=0; i < vector.size(); i++)
System.out.println(vector.get(i));
}
}
Output:
Elements in Vector :
element_1
element_2
element_3
arrayList_element_1
arrayList_element_2
This was an example of how to append all elements of a Collection to a Vector in Java.
