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Collectors toCollection() method in Java 8
The toCollection() method of the Collectors class in Java returns a Collector that accumulates the input elements into a new Collection in encounter order.
The syntax is as follows
static <T,C extends Collection<T>> Collector<T,?,C> toCollection(Supplier<C> collectionFactory)
Here, the parameter
- T - Type of the input elements
- C - Type of the resulting Collection
- Supplier: A supplier of results
- collectionFactory - Supplier that returns a new, empty Collection of the appropriate type
To work with Collectors class in Java, import the following package
import java.util.stream.Collectors;
The following is an example to implement toCollection() method in Java
Example
import java.util.Collection;
import java.util.TreeSet;
import java.util.stream.Collectors;
import java.util.stream.Stream;
public class Demo {
public static void main(String[] args) {
Stream<String> stream = Stream.of("20", "50", "80", "100", "130", "150", "200");
Collection<String> collection = stream.collect(Collectors.toCollection(TreeSet::new));
System.out.println("Collection = "+collection);
}
}Output
Collection = [100, 130, 150, 20, 200, 50, 80]
Updated on: 30-Jul-2019
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