第五次作业

 1 import java.util.ArrayList;
 2 import java.util.List;
 3 import java.util.Random;
 4 
 5 public class Driver {
 6 
 7     private static String[] lastNames = {"Doe", "Smith", "Jones", "Adams", "Marshall", "Thompson", "Bradley", "Brown", "White", "Franklin", "Davis", "Cohn", "Clark"};
 8     private static String[] firstNames = {"Mary", "John", "Susan", "Michael", "David", "Lisa", "Wendy", "Diane", "Kelly", "Claire", "Elizabeth", "Mitchell", "Richard"};
 9 
10     public static void main(String[] args) {
11         
12         // create an empty list
13         List<Student> studentList =  new ArrayList<Student>();
14 
15         // initialize random generator
16         Random random = new Random();
17         
18         // create random number of students
19         generate_radom(studentList, random);
20                 
21     //print out the students
22     put(studentList);
23 
24    }
25 
26     public static void put(List<Student> studentList) {
27         for (Student temp : studentList)
28         {
29             System.out.println(temp);        
30         }
31     }
32 
33     public static void generate_radom(List<Student> studentList, Random random) {
34         for (int i=0; i < 3; i++) {
35 
36             // get random first name
37             String tempFirstName = firstNames[random.nextInt(firstNames.length)];
38             
39             // get random last name
40             String tempLastName = lastNames[random.nextInt(lastNames.length)];
41             
42             // get random age
43             int age = 18 + random.nextInt(20);
44 
45             // create student
46             Student tempStudent = new Student(tempLastName, tempFirstName, age);
47             
48             // add them to the list
49             studentList.add(tempStudent);
50         }
51     }
52 
53 }