In this tutorial, we will see “what is mapToInt() operation as part of streams introduced in Java 8 with example?”
mapToInt() returns an IntStream consisting of the results of applying the given function to the elements of this stream. This is an intermediate operation.
Stream mapToInt in Java 8 with example...!!! Share on X
Example
import java.util.Arrays;
import java.util.List;
import java.util.function.ToIntFunction;
public class MapToInt_Stream_Java8_Example {
public static void main(String[] args) {
System.out.println("mapToInt example - filtering even numbers");
List <String> list = Arrays.asList("5", "14", "23", "98", "76");
//Anonymous Implementation
System.out.println("Using Anonymous Impl");
list.stream().mapToInt(new ToIntFunction <String> () {
@Override
public int applyAsInt(String value) {
return Integer.parseInt(value);
}
}).filter(value -> value % 2 == 0).forEach(value -> System.out.println(value));
//Lambda Implementation
System.out.println("Using Lambda Impl");
list.stream().mapToInt(value -> Integer.parseInt(value)).filter(value -> value % 2 == 0).forEach(value -> System.out.println(value));
}
}
Output:
Using Anonymous Impl 14 98 76 Using Lambda Impl 14 98 76
Stream mapToInt in Java 8 with example...!!! Share on X
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