Example usage for java.util.function Predicate test

Introduction

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

Prototype

boolean test(T t);

Source Link

Document

Evaluates this predicate on the given argument.

Usage

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  
}

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(""));
}

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));
}

From source file:Main.java

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

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

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));
}

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(""));
}

From source file:Main.java

License:asdf

public static void main(String[] args) {
    Predicate<String> i = Predicate.isEqual("asdf");

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

From source file:Main.java

public static void main(String[] args) {
    Predicate<Integer> prime = (value) -> {
        if (value <= 2) {
            return (value == 2);
        }//from w  ww. ja  v  a 2 s  . c o  m
        for (long i = 2; i * i <= value; i++) {
            if (value % i == 0) {
                return false;
            }
        }
        return true;
    };

    System.out.println("Primzahl 1: " + prime.test(1));
    System.out.println("Primzahl 1: " + prime.test(3));
}

From source file:Main.java

public static boolean checkVisaCode(Predicate<Integer> pred, Integer param) {

    return pred.test(param);

}

From source file:Main.java

/**
 * Adds the given value to the collection if the value satisfies the given predicate.
 *
 * @param <E>//www.ja v a 2 s .  c om
 *            the collection element type
 * @param collection
 *            the collection to add the value to
 * @param value
 *            the value to add
 * @param predicate
 *            the predicate to test againts the given value
 * @return <code>true</code>, if the collection has been modified by the operation and <code>false</code> if the
 *         value was <code>null</code> or the collection already contained the value
 */
public static <E> boolean addIf(Collection<E> collection, E value, Predicate<E> predicate) {
    if (predicate.test(value)) {
        return collection.add(value);
    }
    return false;
}