public?void?testCompar(){
????List<Student>?students?=?new?ArrayList<>();
????Random?random?=?new?Random();
????List<String>?ss?=?new?ArrayList<>();//用來儲存隨機數
????for(int?i=0;i<3;i++)?{
????????int?num?=?random.nextInt(10);//產生十以內的隨機數
????????String?s?=?String.valueOf(num);//將隨機數轉化為字符串類型
????????if?(!(ss.contains(s)))?{
????????????ss.add(s);
????????}
????}
????students.add(new?Student(?ss.get(0)+?"",?"小明"));
????students.add(new?Student(ss.get(1)?+?"",?"小紅"));
????students.add(new?Student(ss.get(2)?+?"",?"小蘭"));

????for?(Student?student:students)?{
????????System.out.println("學生："+student.no+":"+student.stuName);
????}
????Collections.sort(students);
????System.out.println("**********************");
????for?(Student?student:students)?{
????????System.out.println("學生："+student.no+":"+student.stuName);
????}
}