Stream.of(T t) in Java with examples

Stream of(T t) returns a sequential Stream containing a single element i.e, a singleton sequential stream. A sequential stream work just like for-loop using a single core. On the other hand, a Parallel stream divide the provided task into many and run them in different threads, utilizing multiple cores of the computer.

Syntax :

static <T> Stream<T> of(T t)

Where, Stream is an interface and T
is the type of stream elements.
t is the single element and the
function returns a singleton 
sequential stream.

Example 1 : Singleton string stream.

// Java code for Stream.of() 
// to get sequential Stream 
// containing a single element. 
import java.util.stream.Stream; 
  
class GFG { 
  
    // Driver code 
    public static void main(String[] args) 
    { 
        // creating a stream of Strings 
        // and printing sequential Stream 
        // containing a single element 
        Stream<String> stream = Stream.of("Geeks"); 
  
        stream.forEach(System.out::println); 
    } 
} 

Output :

Geeks

Example 2 : Singleton Integer Stream.

// Java code for Stream.of() 
// to get sequential Stream 
// containing a single element. 
import java.util.stream.Stream; 
  
class GFG { 
  
    // Driver code 
    public static void main(String[] args) 
    { 
        // creating a stream of Integer 
        // and printing sequential Stream 
        // containing a single element 
        Stream<Integer> stream = Stream.of(5); 
  
        stream.forEach(System.out::println); 
    } 
} 

Output :

Example 3 : Singleton Long stream.

// Java code for Stream.of() 
// to get sequential Stream 
// containing a single element. 
import java.util.stream.Stream; 
  
class GFG { 
  
    // Driver code 
    public static void main(String[] args) 
    { 
        // creating a stream of Long 
        // and printing sequential Stream 
        // containing a single element 
        Stream<Long> stream = Stream.of(4L); 
  
        stream.forEach(System.out::println); 
    } 
} 

Output :

My Personal Notes

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