How to get ArrayList from Stream in Java 8

Given a Stream, the task is to convert this Stream into ArrayList in Java 8.

Examples:

Input: Stream: [1, 2, 3, 4, 5]
Output: ArrayList: [1, 2, 3, 4, 5]

Input: Stream: ['G', 'e', 'e', 'k', 's']
Output: ArrayList: ['G', 'e', 'e', 'k', 's']

1. Using Collectors.toList() method:
   1. Get the Stream to be converted.
   2. Collect the stream as List using collect() and Collectors.toList() methods.
   3. Convert this List into an ArrayList
   4. Return/Print the ArrayList

   Below is the implementation of the above approach:

   Program:

   // Java program to convert Stream to ArrayList
   // using Collectors.toList() method
   
   import java.util.*;
   import java.util.stream.*;
   
   public class GFG {
   
       // Function to get ArrayList from Stream
       public static <T> ArrayList<T>
       getArrayListFromStream(Stream<T> stream)
       {
   
           // Convert the Stream to List
           List<T>
               list = stream.collect(Collectors.toList());
   
           // Create an ArrayList of the List
           ArrayList<T>
               arrayList = new ArrayList<T>(list);
   
           // Return the ArrayList
           return arrayList;
       }
   
       // Driver code
       public static void main(String args[])
       {
   
           Stream<Integer>
               stream = Stream.of(1, 2, 3, 4, 5);
   
           // Convert Stream to ArrayList in Java
           ArrayList<Integer>
               arrayList = getArrayListFromStream(stream);
   
           // Print the arraylist
           System.out.println("ArrayList: " + arrayList);
       }
   }
   Output:

   ArrayList: [1, 2, 3, 4, 5]
   

2. Using Collectors.toCollection() method:
   Approach:
   1. Get the Stream to be converted.
   2. Collect the stream as ArrayList using collect() and Collectors.toCollection() methods.
   3. Return/Print the ArrayList

   Below is the implementation of the above approach:

   Program:

   // Java program to convert Stream to ArrayList
   // using Collectors.toList() method
   
   import java.util.*;
   import java.util.stream.*;
   
   public class GFG {
   
       // Function to get ArrayList from Stream
       public static <T> ArrayList<T>
       getArrayListFromStream(Stream<T> stream)
       {
   
           // Convert the Stream to ArrayList
           ArrayList<T>
               arrayList = stream
                               .collect(Collectors
                               .toCollection(ArrayList::new));
   
           // Return the ArrayList
           return arrayList;
       }
   
       // Driver code
       public static void main(String args[])
       {
   
           Stream<Integer>
               stream = Stream.of(1, 2, 3, 4, 5);
   
           // Convert Stream to ArrayList in Java
           ArrayList<Integer>
               arrayList = getArrayListFromStream(stream);
   
           // Print the arraylist
           System.out.println("ArrayList: "
                              + arrayList);
       }
   }
   Output:

   ArrayList: [1, 2, 3, 4, 5]