添加学生对象并遍历。需求:定义一个集合，添加一些学生对象，并进行遍历学生类的属性为:姓名，年龄。

先创建学生类

public class Student {
    private String name;
    private int age;

    public Student() {
    }

    public Student(java.lang.String name, int age) {
        this.name = name;
        this.age = age;
    }

    public java.lang.String getName() {
        return name;
    }

    public void setName(java.lang.String name) {
        this.name = name;
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }
}

再创建测试类

import java.util.ArrayList;
public class StudentTest {
    public static void main(String[] args) {
        //创建对象
        ArrayList<Student>list=new ArrayList<>();

        //创建学生对象
        Student s1=new Student("zhangsan",23);
        Student s2=new Student("lisi",24);
        Student s3=new Student("wangwu",25);

        //添加元素
        list.add(s1);
        list.add(s2);
        list.add(s3);

        //遍历组合
        for(int i=0;i<list.size();i++){
            Student stu=list.get(i);
            System.out.println(stu.getName()+","+stu.getAge());
        }
    }
}