LongStream mapToObj() returns an object-valued Stream consisting of the results of applying the given function.
Note : LongStream mapToObj() is a intermediate operation. These operations are always lazy. Intermediate operations are invoked on a Stream instance and after they finish their processing, they give a Stream instance as output.
Syntax :
<U> Stream<U> mapToObj(LongFunction<? extends U> mapper)
Parameters :
- U : The element type of the new stream.
- Stream : A sequence of elements supporting sequential and parallel aggregate operations.
- LongFunction : Represents a function that accepts a long-valued argument and produces a result.
- mapper : A stateless function to apply to each element.
Return Value : The function returns an object-valued Stream consisting of the results of applying the given function.
Example 1 :
// Java code for LongStream mapToObj// (LongFunction mapper)import java.util.*;import java.util.stream.Stream;import java.util.stream.LongStream; class GFG { // Driver code public static void main(String[] args) { // Creating an LongStream LongStream stream = LongStream.range(3L, 8L); // Creating a Stream of Strings // Using LongStream mapToObj(LongFunction mapper) // to store binary representation of // elements in LongStream Stream<String> stream1 = stream.mapToObj(num -> Long.toBinaryString(num)); // Displaying an object-valued Stream // consisting of the results of // applying the given function. stream1.forEach(System.out::println); }} |
Output :
11 100 101 110 111
Example 2 :
// Java code for LongStream mapToObj// (LongFunction mapper)import java.util.*; import java.math.BigInteger;import java.util.stream.Stream;import java.util.stream.LongStream; class GFG { // Driver code public static void main(String[] args) { // Creating an LongStream LongStream stream = LongStream.of(3L, 5L, 7L, 9L, 11L); // Creating a Stream // Using LongStream mapToObj(LongFunction mapper) Stream<BigInteger> stream1 = stream .mapToObj(BigInteger::valueOf); // Displaying an object-valued Stream // consisting of the results of // applying the given function. stream1.forEach(num -> System.out.println(num.add(BigInteger.TEN))); }} |
Output :
13 15 17 19 21
