第五次作业（1、2、3、4.1)

import java.util.ArrayList;
import java.util.List;
import java.util.Random;


public class Driver {

    private static String[] lastNames = {"Doe", "Smith", "Jones", "Adams", "Marshall", "Thompson", "Bradley", "Brown", "White", "Franklin", "Davis", "Cohn", "Clark"};
    private static String[] firstNames = {"Mary", "John", "Susan", "Michael", "David", "Lisa", "Wendy", "Diane", "Kelly", "Claire", "Elizabeth", "Mitchell", "Richard"};

    public static void main(String[] args) {
        
        // create an empty list
        List<Student> studentList =  new ArrayList<Student>();

        // initialize random generator
        Random random = new Random();
        
        // create random number of students
        loop(studentList, random);
        
        
    //print out the students
    for (Student temp : studentList) {
        printDetails(temp);
        
    }

   }

    public static void loop(List<Student> studentList, Random random) {
        for (int i=0; i < 3; i++) {

            // get random first name
            String tempFirstName = firstNames[random.nextInt(firstNames.length)];
            
            // get random last name
            String tempLastName = lastNames[random.nextInt(lastNames.length)];
            
            // get random age
            int age = 18 + random.nextInt(20);

            // create student
            Student tempStudent = new Student(tempLastName, tempFirstName, age);
            
            // add them to the list
            studentList.add(tempStudent);
        }
    }

    public static void printDetails(Student temp) {
        System.out.println(temp);
    }

}