IntStream peek() es un método en java.util.stream.IntStream. La función devuelve una secuencia que consta de los elementos de esta secuencia y, además, realiza la acción proporcionada en cada elemento a medida que se consumen elementos de la secuencia resultante.
Sintaxis:
IntStream peek(IntConsumer action) Where, IntStream is a sequence of primitive int-valued elements and the function returns a parallel IntStream and IntConsumer represents an operation that accepts a single int-valued argument.
Ejemplo 1: Realización de una suma en un flujo de rango dado.
// Java code for IntStream peek()
// where the action performed is to get
// sum of all elements in given range
import java.util.*;
import java.util.stream.IntStream;
class GFG {
// Driver code
public static void main(String[] args) {
// Creating a stream of integers
IntStream stream = IntStream.range(2, 10);
// performing action sum on elements of
// given range and storing the result in sum
int sum = stream.peek(System.out::println).sum();
// Displaying the result of action performed
System.out.println("sum is : " + sum);
}
}
Producción :
2 3 4 5 6 7 8 9 sum is : 44
Ejemplo 2: Realización de una operación de conteo en un flujo de rango dado.
// Java code for IntStream peek()
// where the action performed is to get
// count of all elements in given range
import java.util.*;
import java.util.stream.IntStream;
class GFG {
// Driver code
public static void main(String[] args) {
// Creating a stream of integers
IntStream stream = IntStream.range(2, 10);
// performing action count on elements of
// given range and storing the result in Count
long Count = stream.peek(System.out::println).count();
// Displaying the result of action performed
System.out.println("count : " + Count);
}
}
Producción :
2 3 4 5 6 7 8 9 count : 8
Ejemplo 3: Realización de una operación promedio en un flujo de rango dado.
// Java code for IntStream peek()
// where the action performed is to get
// average of all elements in given range
import java.util.*;
import java.util.OptionalDouble;
import java.util.stream.IntStream;
class GFG {
// Driver code
public static void main(String[] args) {
// Creating a stream of integers
IntStream stream = IntStream.range(2, 10);
// performing action average on elements of
// given range and storing the result in avg
OptionalDouble avg = stream.peek(System.out::println)
.average();
// If a value is present, isPresent()
// will return true, else -1 is displayed.
if(avg.isPresent())
{
System.out.println("Average is : " + avg.getAsDouble());
}
else
{
System.out.println("-1");
}
}
}
Producción :
2 3 4 5 6 7 8 9 Average is : 5.5
Publicación traducida automáticamente
Artículo escrito por Sahil_Bansall y traducido por Barcelona Geeks. The original can be accessed here. Licence: CCBY-SA