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Java 8 predicate test method example

for this
https://stackoverflow.com/questions/1128723/how-do-i-determine-whether-an-array-contains-a-particular-value-in-java/1128728#1128728                 

I have a String[] with values like so:

public static final String[] VALUES = new String[] {"AB","BC","CD","AE"};

Given String s, is there a good way of testing whether VALUES contains s?

ANS:

Java 8 predicate test method is best for it.

test(T t) : Evaluates this predicate on the given argument.boolean test(T t)

test(T t) Parameters: t - the input argument Returns: true if the input argument matches the predicate, otherwise false

Here is a full example of it.

import java.util.Arrays;

import java.util.List;

import java.util.function.Predicate;

public class Test {

public static final List<String> VALUES = Arrays.asList("AA", "AB", "BC", "CD", "AE");

public static void main(String args[]) {

Predicate<String> containsLetterA = VALUES -> VALUES.contains("AB");

for (String i : VALUES) {

System.out.println(containsLetterA.test(i));

}

}

}