12.在集合中存的是自定义的对象（重点）

package com.work;

import java.util.ArrayList;
import java.util.List;

class Student {
    private String name;
    private int age;
    //有参构造
    public Student(String name, int age) {
        this.name = name;
        this.age = age;
    }

    //ToString  防止取到地址
    @Override
    public String toString() {
        return "Student{" +
                "name='" + name + '\'' +
                ", age=" + age +
                '}';
    }

    //get set
    public String getName() {
        return name;
    }

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

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }
}
public class Demo1 {
    public static void main(String[] args) {
        Student student1 = new Student("小白" , 18);
        Student student2 = new Student("小黑" , 8);
        List<Student> list = new ArrayList<>();
        list.add(student1);
        list.add(student2);
        System.out.println(list);
    }
}