List<Student> ls = new ArrayList<Student>();
......
Student student = (Student)ls.get(1)
student.getXXX()
......
追问(Student)ls.get(1) 为什么要转型成Student?
追答我这个只是示意,String name、String age、String sex 这几个属性属于哪个对象你就转换为哪个对象
Student s1 = new Student();
s1.setName("张三");
......
Student s2 = new Student();
s2.setName("张三");
......
Student s3 = new Student();
s3.setName("张三");
......
List<Student> ls = new ArrayList<Student>();
ls.add(s1);
ls.add(s2);
ls.add(s3);
//获取第二个
Student st = (Student)ls.get(1); //获取的是s2对象
String ss = st.getName();
......本回答被提问者采纳