Практика7.2в

package com.company;

import java.util.function.Predicate;

public class Main {

    public static void main(String[] args) {
        String str1 = "Задание 2а", str2 = " ", str3 = "";
        Predicate <String> Ref = (String str) -> str!=null;
        Predicate <String> Ref2 = (String str) -> str!="";

        System.out.println(Ref.and(Ref2).test(str1));
        System.out.println(Ref.and(Ref2).test(str2));
        System.out.println(Ref.and(Ref2).test(str3));
    }
}