Example usage for java.util.function Predicate negate

Introduction

In this page you can find the example usage for java.util.function Predicate negate.

Prototype

default Predicate<T> negate() 

Source Link

Document

Returns a predicate that represents the logical negation of this predicate.

Usage

From source file:Main.java

public static void main(String[] args) {
    Predicate<String> i = (s) -> s.length() > 5;

    System.out.println(i.negate().test("java2s.com "));
}

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From source file:Main.java

public static void main(String[] args) {
    List<String> names = Arrays.asList("Chris", "HTML", "XML", "CSS", "");

    Stream<String> s = names.stream();

    Predicate<String> isEmpty = String::isEmpty;
    Predicate<String> notEmpty = isEmpty.negate();

    System.out.println(s.filter(notEmpty).collect(Collectors.toList()));
}

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From source file:Main.java

public static void main(String... args) {
    Predicate<String> predicate = (s) -> s.length() > 0;

    predicate.test("foo"); // true
    predicate.negate().test("foo"); // false  
}

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From source file:Main.java

public static void main(String[] argv) throws Exception {
    List<String> argList = Arrays.asList("help", "v");

    Predicate<String> isHelp = (s) -> s.matches("(h|help)");

    argList = argList.stream().filter(isHelp.negate()).collect(Collectors.toList());

    System.out.println(argList);/*from www  .j  a  va 2 s .c o  m*/
}

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From source file:Main.java

public static void main(String... args) {
    Predicate<String> isEmpty = String::isEmpty;
    System.out.println(isEmpty.test(""));
    System.out.println(isEmpty.negate().test(""));
}

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From source file:Main.java

public static void main(String... args) {
    Predicate<Boolean> nonNull = Objects::isNull;
    System.out.println(nonNull.test(true));
    System.out.println(nonNull.negate().test(false));
}

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From source file:Main.java

public static void main(String... args) {
    Predicate<Boolean> nonNull = Objects::nonNull;
    System.out.println(nonNull.test(true));
    System.out.println(nonNull.negate().test(false));
}

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From source file:Main.java

public static void main(String... args) {
    Predicate<String> isEmpty = String::isEmpty;
    System.out.println(isEmpty.test(""));

    Predicate<String> isNotEmpty = isEmpty.negate();

    System.out.println(isNotEmpty.test(""));
}

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From source file:Main.java

public static void main(String[] args) {
    Predicate<Student> isPaidEnough = e -> e.gpa > 1;
    Predicate<Student> isExperiencedEnough = e -> e.id < 10;

    List<Student> students = Arrays.asList(new Student(1, 3, "John"), new Student(2, 4, "Jane"),
            new Student(3, 3, "Jack"));

    System.out.println(findStudents(students, isPaidEnough));
    System.out.println(findStudents(students, isExperiencedEnough));
    System.out.println(findStudents(students, isExperiencedEnough.negate()));

    Student somebody = students.get(0);//from  www. j a  v a2  s  .c  o m
    System.out.println(findStudents(students, Predicate.<Student>isEqual(somebody)));
}

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From source file:io.github.jeddict.jcode.util.JavaUtil.java

public static <R> Predicate<R> not(Predicate<R> predicate) {
    return predicate.negate();
}

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