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Copy pathStreamsExample.java
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50 lines (39 loc) · 1.58 KB
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import java.util.Arrays;
import java.util.Collections;
import java.util.LinkedList;
import java.util.List;
import java.util.stream.IntStream;
import java.util.stream.Stream;
public class StreamsExample {
// Streams example
public static void main(String[] args) {
// Primitive Array
int[] premitiveArray = { 1, 2, 3, 4 };
// Object Arrays
Integer[] objectArray = { 1, 2, 3, 4 };
final IntStream intStream = Arrays.stream(premitiveArray);
intStream.forEach(System.out::println);
System.out.println("************************************");
final Stream<Integer> integerStream = Stream.of(objectArray);
integerStream.forEach(System.out::println);
System.out.println("----");
List<Integer> integerList = Arrays.asList(1, 2, 3, 4);
integerList.stream()
.forEach(System.out::println);
// Filter
System.out.println("Filter Example");
List<Integer> numbers = Arrays.asList(1, 2, 3, 4, 5, 6);
numbers.stream()
.filter(n -> n % 2 == 0)
.forEach(System.out::println);
// Reverse the numbers using STREAMS
List<Integer> lists = Arrays.asList(217, 317, 417, 517);
lists.stream()
.sorted(Collections.reverseOrder()) // Method on Stream<Integer>
.forEach(System.out::println);
LinkedList<Integer> reversed = new LinkedList<>();
lists.parallelStream()
.forEachOrdered(reversed::addFirst);
System.out.println("Reversed List: " + reversed);
}
}