Java Collection How to - Insert all elements of other Collection to Specified Index of ArrayList

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Question

We would like to know how to insert all elements of other Collection to Specified Index of ArrayList.

Answer

import java.util.ArrayList;
import java.util.List;
import java.util.Vector;
//  ww  w .j a v  a  2  s .  com
public class Main {
  public static void main(String[] args) {
    List<String> arrayList = new ArrayList<String>();
    arrayList.add("1");
    arrayList.add("2");
    arrayList.add("3");

    Vector<String> v = new Vector<String>();
    v.add("4");
    v.add("5");

    // insert all elements of Vector to ArrayList at index 1
    arrayList.addAll(1, v);
    
    for (String str: arrayList)
      System.out.println(str);
  }
}

The code above generates the following result.

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