Java ArrayList中存放引用数据类型的方式

import java.util.ArrayList;

public class Student implements Cloneable{

    private int age;
    private String name;

    public static void main(String[] args) {
        Array<b style="color:transparent">本文来源gao@!dai!ma.com搞$$代^@码!网!</b>List<Student> students = new ArrayList<Student>();
        Student st = new Student();
        st.age = 10;
        st.name = "marco";

        students.add(st);
        st.age = 20;    //修改age值

        System.out.println(students.get(0).age);    //输出为20
    }
}