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LongStream sorted() in Java

  • Last Updated : 06 Dec, 2018

LongStream sorted() returns a stream consisting of the elements of this stream in sorted order. It is a stateful intermediate operation i.e, it may incorporate state from previously seen elements when processing new elements. Stateful intermediate operations may need to process the entire input before producing a result. For example, one cannot produce any results from sorting a stream until one has seen all elements of the stream.

Syntax :

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LongStream sorted()

Where, LongStream is a sequence of primitive long-valued 
elements. This is the long primitive specialization of Stream.

Exception : If the elements of this stream are not Comparable, a java.lang.ClassCastException may be thrown when the terminal operation is executed.

Return Value : LongStream sorted() method returns the new stream.



Example 1 : Using LongStream sorted() to sort the numbers in given LongStream.




// Java code to sort LongStream
// using LongStream.sorted()
import java.util.*;
import java.util.stream.LongStream;
  
class GFG {
  
    // Driver code
    public static void main(String[] args)
    {
        // Creating an LongStream
        LongStream stream = LongStream.of(10L, 9L, 8L, 7L, 6L);
  
        // displaying the stream with sorted elements
        // using LongStream.sorted() function
        stream.sorted().forEach(System.out::println);
    }
}
Output:
6
7
8
9
10

Example 2 : Using LongStream sorted() to sort the random numbers generated by LongStream generator().




// Java code to sort LongStream
// using LongStream.sorted()
import java.util.*;
import java.util.stream.LongStream;
  
class GFG {
  
    // Driver code
    public static void main(String[] args)
    {
        // Creating an LongStream by generating
        // random elements using LongStream.generate()
        LongStream stream = LongStream.generate(()
                                                    -> (long)(Math.random() * 10000))
                                .limit(5);
  
        // displaying the stream with sorted elements
        // using LongStream.sorted() function
        stream.sorted().forEach(System.out::println);
    }
}
Output:
2218
6150
6757
8020
8266



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