创建一个工人类（worker），以及一个list集合，在集合中添加三个工人信息： 姓名 年龄 工资 张三 30 3000 Worker w1=new Worker(“张三”,30,3000); 李四 25 3500 王五 27 3200 2.在李四之前插入一个工人，信息为：姓名：赵六，年龄：24，工资3300 3. 删除王五的信息 4．利用for 循环遍历，打印List 中所有工人的信息 5.利用迭代遍历(Iterator)，对List 中所有的工人调用work 方法。用java代码显示

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

class Worker {
    String name;
    int age;
    int salary;

    public Worker(String name, int age, int salary) {
        this.name = name;
        this.age = age;
        this.salary = salary;
    }

    public void work() {
        System.out.println(name + " is working.");
    }

    public String toString() {
        return "Name: " + name + ", Age: " + age + ", Salary: " + salary;
    }
}

public class Main {
    public static void main(String[] args) {
        List<Worker> list = new ArrayList<>();
        Worker w1 = new Worker("张三", 30, 3000);
        list.add(w1);
        Worker w2 = new Worker("李四", 25, 3500);
        list.add(w2);
        Worker w3 = new Worker("王五", 27, 3200);
        list.add(w3);

        Worker w4 = new Worker("赵六", 24, 3300);
        list.add(1, w4);

        list.remove(w3);

        for (int i = 0; i < list.size(); i++) {
            System.out.println(list.get(i));
        }

        Iterator<Worker> it = list.iterator();
        while (it.hasNext()) {
            it.next().work();
        }
    }
}

输出：

Name: 张三, Age: 30, Salary: 3000
Name: 赵六, Age: 24, Salary: 3300
Name: 李四, Age: 25, Salary: 3500

张三 is working.
赵六 is working.
李四 is working.