LongStream noneMatch() in Java with examples

LongStream noneMatch(LongPredicate predicate) returns whether no elements of this stream match the provided predicate. It may not evaluate the predicate on all elements if not necessary for determining the result. This is a short-circuiting terminal operation. A terminal operation is short-circuiting if, when presented with infinite input, it may terminate in finite time.
Syntax :

boolean noneMatch(LongPredicate predicate) 

Parameters :

  1. LongPredicate : A predicate (boolean-valued function) of one long-valued argument.

Return Value : The function returns true if either all elements of the stream match the provided predicate or the stream is empty, otherwise false.



Note : If the stream is empty then true is returned and the predicate is not evaluated.

Example 1 : noneMatch() function to check whether no element of LongStream is divisible by 5.

filter_none

edit
close

play_arrow

link
brightness_4
code

// Java code for LongStream noneMatch
// (LongPredicate predicate) to check whether
// no element of this stream match
// the provided predicate.
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(3L, 5L, 9L, 12L, 14L);
  
        // Check if no element of stream
        // is divisible by 5 using
        // LongStream noneMatch(LongPredicate predicate)
        boolean answer = stream.noneMatch(num -> num % 5 == 0);
  
        // Displaying the result
        System.out.println(answer);
    }
}

chevron_right


Output:

false

Example 2 : noneMatch() function to check whether no element in the LongStream obtained after concatenating two LongStreams is less than 2.

filter_none

edit
close

play_arrow

link
brightness_4
code

// Java code for LongStream noneMatch
// (LongPredicate predicate) to check whether
// no element of this stream match
// the provided predicate.
import java.util.*;
import java.util.stream.LongStream;
  
class GFG {
  
    // Driver code
    public static void main(String[] args)
    {
        // Creating an LongStream after concatenating
        // two LongStreams
        LongStream stream = LongStream.concat(LongStream.of(3L, 4L, 5L, 6L),
                                              LongStream.of(7L, 8L, 9L, 10L));
  
        // Check if no element of stream
        // is less than 2 using
        // LongStream noneMatch(LongPredicate predicate)
        boolean answer = stream.noneMatch(num -> num < 2);
  
        // Displaying the result
        System.out.println(answer);
    }
}

chevron_right


Output:

true

Example 3 : noneMatch() function to show if the stream is empty then true is returned.

filter_none

edit
close

play_arrow

link
brightness_4
code

// Java code for LongStream noneMatch
// (LongPredicate predicate) to check whether
// no element of this stream match
// the provided predicate.
import java.util.*;
import java.util.stream.LongStream;
  
class GFG {
  
    // Driver code
    public static void main(String[] args)
    {
        // Creating an empty LongStream
        LongStream stream = LongStream.empty();
  
        // Using LongStream noneMatch() on empty stream
        boolean answer = stream.noneMatch(num -> true);
  
        // Displaying the result
        System.out.println(answer);
    }
}

chevron_right


Output:

true


My Personal Notes arrow_drop_up

In love with a semicolon because sometimes i miss it so badly)

If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.

Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below.