创建一个list，在list中增加三个工人，基本信息如下：姓名 年龄 工资zhang3 18 3000li4 25 3500wang5 22 3200

public class Demo1 {
    public static void main(String[] args) {
        //调用list集合，可以用ArrayList接受
        List list=new ArrayList<>();
        list.add(new Book("张三",100));
        list.add(new Book("李四",400));
        list.add(new Book("王五",500));

        //在li4之前插入一个工人，信息为:姓名:zhao6，年龄:24，工资3300
        list.add(1,new Book("zhao6",3300));
        //删除wang5的信息
        list.remove(3);
        for (int i = 0; i < list.size(); i++) {
            System.out.println(list.get(i));

        }
    }
}

public class Book implements Comparable {
     private String name;
     private double price;


    public Book(String name, double price) {
        this.name = name;
        this.price = price;
    }

    public Book() {
    }

    public String getName() {
        return name;
    }

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

    public double getPrice() {
        return price;
    }

    public void setPrice(double price) {
        this.price = price;
    }

    @Override
    public String toString() {
        return "Book{" +
                "name='" + name + ''' +
                ", price=" + price +
                '}';
    }

    @Override
    public int compareTo(Object o) {
        Book bk=(Book)o;
        if(bk.price==this.price){
            return 1;
        }
        return 0;
    }
}