IntStream map() method in Java

The IntStream map() method returns the new stream consisting of the results of applying the given function to the elements of this stream.

The syntax is as follows

IntStream map(IntUnaryOperator mapper)

Here, mapper parameter is a non-interfering, stateless function to apply to each element

Create an IntStream and add some elements

IntStream intStream1 = IntStream.of(20, 35, 40, 55, 60);

Now, map it with the new IntStream and display the updated stream elements applying the condition in the map() function

IntStream intStream2 = intStream1.map(a -> (a + a));

The following is an example to implement IntStream map() method in Java

Example

 Live Demo

import java.util.*;
import java.util.stream.IntStream;
public class Demo {
   public static void main(String[] args) {
      IntStream intStream1 = IntStream.of(20, 35, 40, 55, 60);
      IntStream intStream2 = intStream1.map(a -> (a + a));
      System.out.println("Updated Stream...");
      intStream2.forEach(System.out::println);
   }
}

Output

Updated Stream...
40
70
80
110
120