IntStream noneMatch() in Java with examples

IntStream noneMatch(IntPredicate 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(IntPredicate predicate)

Where, IntPredicate represents a predicate (boolean-valued function)
of one int-valued argument and 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 IntStream is divisible by 5.

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// Java code for IntStream noneMatch
// (Predicate predicate) to check whether
// no element of this stream match
// the provided predicate.
import java.util.*;
import java.util.stream.IntStream;
  
class GFG {
  
    // Driver code
    public static void main(String[] args)
    {
  
        // Creating an IntStream
        IntStream stream = IntStream.of(3, 5, 9, 12, 14);
  
        // Check if no element of stream
        // is divisible by 5 using
        // IntStream noneMatch(Predicate predicate)
        boolean answer = stream.noneMatch(num -> num % 5 == 0);
  
        // Displaying the result
        System.out.println(answer);
    }
}

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Output:

false

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



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

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Output:

true

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

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

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Output:

true


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

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