Program to Convert a Vector to List in Java

Given a Vector, the task is to Convert Vector to List in Java

Examples:

Input: Vector: [1, 2, 3, 4, 5]
Output: List: [1, 2, 3, 4, 5]

Input : Vector = [a, b, c, d, e, f]
Output : List  = [a, b, c, d, e, f]

• Using Collections.list() method

  Syntax:

  List list = Collections.list(vec.elements());
  

  Approach:

  1. Get the Vector
  2. Convert into list using Collections.list(vector.elements()) method, which returns a List of objects.
  3. Print the List

  Below is the implementation of the above approach:

  
  

  
  
  

  // Java program to // convert vector to List    import java.util.*;    public class GFG {     public static void main(String[] args)     {            // Create a Vector of String elements         Vector<String> vec = new Vector<String>();            // Adding values of Vector         vec.add("1");         vec.add("2");         vec.add("3");         vec.add("4");         vec.add("5");            // print Vector elements         System.out.println("Vector: " + vec);            // Convert Vector to List         List<String>             list = Collections.list(vec.elements());            // print List Elements         System.out.println("List:" + list);     } }

  Output:

  Vector: [1, 2, 3, 4, 5]
  List:[1, 2, 3, 4, 5]
  

• Using Collection.unmodifiableList()

  Syntax:

  List list = Collections.unmodifiableList(vector);
  

  Approach:

  1. Get the Vector
  2. Convert into list using Collections.unmodifiableList(vector) method, which returns an immutable List of objects.
  3. Print the List

  Below is the implementation of the above approach:

  
  

  
  
  

  // Java program to // convert vector to List    import java.util.*;    public class GFG {     public static void main(String[] args)     {            // Create a Vector of String elements         Vector<String> vec = new Vector<String>();            // Adding values of Vector         vec.add("1");         vec.add("2");         vec.add("3");         vec.add("4");         vec.add("5");            // print Vector elements         System.out.println("Vector: " + vec);            // Convert Vector to List         List<String>             list = Collections.unmodifiableList(vec);            // print List Elements         System.out.println("List:" + list);     } }

  Output:

  Vector: [1, 2, 3, 4, 5]
  List:[1, 2, 3, 4, 5]
  

• Using constructor

  Syntax:

  List list = new ArrayList(vector);
  

  Approach:

  1. Get the Vector
  2. Create a List from the Vector by passing the vector as the parameter.
  3. Print the List

  Below is the implementation of the above approach:

  
  

  
  
  

  // Java program to // convert vector to List    import java.util.*;    public class GFG {     public static void main(String[] args)     {            // Create a Vector of String elements         Vector<String> vec = new Vector<String>();            // Adding values of Vector         vec.add("1");         vec.add("2");         vec.add("3");         vec.add("4");         vec.add("5");            // print Vector elements         System.out.println("Vector: " + vec);            // Convert Vector to List         List<String>             list = new ArrayList<String>(vec);            // print List Elements         System.out.println("List:" + list);     } }

  Output:

  Vector: [1, 2, 3, 4, 5]
  List:[1, 2, 3, 4, 5]