content: package com.annimon.stream;
  
  import com.annimon.stream.function.Function;
  import java.util.Arrays;
  import java.util.List;
  
  /**
   * Holds data for testing purposes.
   */
  public final class Students {
  
      public static final Student STEVE_CS_4 = new Student("Steve", "CS", 4);
      public static final Student MARIA_ECONOMICS_1 = new Student("Maria", "Economics", 1);
      public static final Student VICTORIA_CS_3 = new Student("Victoria", "CS", 3);
      public static final Student JOHN_CS_2 = new Student("John", "CS", 2);
      public static final Student SERGEY_ECONOMICS_2 = new Student("Sergey", "Economics", 2);
      public static final Student GEORGE_LAW_3 = new Student("George", "Law", 3);
      public static final Student SERGEY_LAW_1 = new Student("Sergey", "Law", 1);
      public static final Student SOPHIA_ECONOMICS_2 = new Student("Sophia", "Economics", 2);
      public static final Student MARIA_CS_1 = new Student("Maria", "CS", 1);
      
      public static final List<Student> ALL = Arrays.asList(
              STEVE_CS_4, MARIA_ECONOMICS_1, VICTORIA_CS_3, JOHN_CS_2, SERGEY_ECONOMICS_2,
              GEORGE_LAW_3, SERGEY_LAW_1, SOPHIA_ECONOMICS_2, MARIA_CS_1
      );
      
      
      public static final Function<Student, String> speciality = new Function<Student, String>() {
          @Override
          public String apply(Student student) {
              return student.getSpeciality();
          }
      };
      
      public static final Function<Student, Integer> course = new Function<Student, Integer>() {
          @Override
          public Integer apply(Student student) {
              return student.getCourse();
          }
      };
      
      public static final Function<Student, String> studentName = new Function<Student, String>() {
          @Override
          public String apply(Student student) {
              return student.getName();
          }
      };
  }
  