Simple utility method to check for 'emptiness' of objects.The 'emptiness' criteria is defined by a java.util.function.Predicate.On the lines of Objects.requireNonNull

RandomGist.java

import java.util.Collections;
import java.util.List;
import java.util.Objects;
import java.util.function.Predicate;

public class RandomGist {

    public static <T> T requireNonEmpty(T object, Predicate<T> predicate, String msgToCaller){
        Objects.requireNonNull(object);
        Objects.requireNonNull(predicate);
        if (predicate.test(object)){
            throw new IllegalArgumentException(msgToCaller);
        }
        return object;
    }

    public static void main(String[] args) {
        
    //Usage 1: an empty string (intentional)

    String s = "";
    System.out.println(requireNonEmpty(Objects.requireNonNull(s), (s1) -> s1.isEmpty() , "My String is Empty!"));

    //Usage 2: an empty List (intentional)
    List list =  Collections.emptyList();
    System.out.println(requireNonEmpty(Objects.requireNonNull(list), (l) -> l.isEmpty(), "List is Empty!").size());

    //Usage 3: an empty User (intentional)
    User user = new User("");
    System.out.println(requireNonEmpty(Objects.requireNonNull(user), (u) -> u.getName().isEmpty(), "User is Empty!"));
}

    private static class User {
        private String name;

        public User(String name){
            this.name = name;
        }

        public String getName(){
            return name;
        }
    }
}