is there a Java equivalent to Javascript's “some” method?

Question

I have a collection and I would like to know if at least one element meets some condition. Essentially, what some does in JavaScript, I would like to do on a collection!

Answer 1

As of Java 8, you can convert the Collection into a Stream and use anyMatch as in the following example.

import java.util.Arrays;
import java.util.List;

public class SomeExample {
    public static void main(String[] args) {
        List list = Arrays.asList(1, 2, 3, 4, 5, -6, 7);
        boolean hasNegative = list.stream().anyMatch(x -> x < 0);
        if (hasNegative) {
            System.out.println("List contains some negative number");
        }
        else {
            System.out.println("List does not contain any negative number");
        }
    }
}