Lambda end operation find and match allmatch

allMatch

​ It can be used to judge whether they all meet the matching conditions , The result is boolean type . If they all agree, the result is true, Otherwise, the result is false.

Example ：

​ Judge whether all writers are adults

//         Judge whether all writers are adults 
        List<Author> authors = getAuthors();
        boolean flag = authors.stream()
                .allMatch(author -> author.getAge() >= 18);
        System.out.println(flag);