使用list集合实现对数据的增加，插入，删除_实体类的list批量添加数据-优快云博客

本文链接：https://blog.youkuaiyun.com/Yzx02155611/article/details/121219046

该篇博客展示了如何在Java中创建一个名为`Student`的实体类，并进行实例化、存储到ArrayList及进行插入、删除操作。通过一个名为`Test`的测试类，博主演示了ArrayList的基本用法，包括添加新学生对象`zhao6`，删除`wang5`的信息，以及遍历打印所有学生信息的过程。

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1，首先创建实体类

package com.yzx.demo7;
//创建实体类
public class Student {
    private  String  name;
    private  int     age;
    private  int     gongzi;

    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 int getGongzi() {
        return gongzi;
    }

    public void setGongzi(int gongzi) {
        this.gongzi = gongzi;
    }

    @Override
    public String toString() {
        return "Student{" +
                "name='" + name + '\'' +
                ", age=" + age +
                ", gongzi=" + gongzi +
                '}';
    }

    public Student() {
        super();
    }

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

2.然后创建测试类：

package com.yzx.demo7;

import java.util.ArrayList;

//创建测试类
public class Test {
    public static void main(String[] args) {
        ArrayList<Student> list = new ArrayList<>();

        System.out.print("           姓名        ");
        System.out.print("年龄        ");
        System.out.println("工资");

        list.add(new Student("zhang3",19,3000));
        list.add(new Student("li4",25,3500));
        list.add(new Student("wang5",22,3200));

        for(Student s:list) {
            System.out.println(s);
        }

        System.out.println("----------");

        //插入zhao6
        list.add(1,new Student("zhao6",24,3300));
        for (Student w : list) {
            System.out.println(w);
        }
        System.out.println("------------");

        //删除wang5的信息
        list.remove(3);
        for (Student w : list) {
            System.out.println(w);
        }
        System.out.println("------------");


    }
}

效果: