Problem E: List练习

1.题目描述

运用List完成下面的要求:

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

Tom 18 3000

Peter 25 3500

Mark 22 3200

插入一个工人，信息为：姓名：Robert，年龄：24，工资3300
删除姓名为"Mark"的工人
利用for 循环遍历，打印List中所有工人的信息
利用迭代遍历，对List中所有的工人调用work方法。

完成下列代码:

import java.util.ArrayList;

import java.util.Iterator;

import java.util.List;

class Worker{

private int age;

private String name;

private double salary;

public Worker(String name,int age,double salary)

// 你的代码嵌入这里

class Main{

public static void main(String \[\] args){

workerHelper wh = new workerHelper();

List<Worker> ls = new ArrayList<>();

wh.add(ls);

wh.append(ls);

wh.del(ls,"Mark");

wh.print(ls);

wh.callwork(ls);

}

2.输出描述

Workers info:Tom 18 3000.0

Workers info:Peter 25 3500.0

Workers info:Robert 24 3300.0

Tom work

Peter work

Robert work

3.代码实现

1.提交代码

java 复制代码

{
        this.name = name;
        this.age = age;
        this.salary = salary;
    }

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

    // Getter 方法用于访问属性
    public String getName() {
        return name;
    }

    public int getAge() {
        return age;
    }

    public double getSalary() {
        return salary;
    }
}


class workerHelper {

    // 添加初始三个工人
    public void add(List<Worker> list) {
        list.add(new Worker("Tom", 18, 3000));
        list.add(new Worker("Peter", 25, 3500));
        list.add(new Worker("Mark", 22, 3200));
    }

    // 插入一个工人 Robert
    public void append(List<Worker> list) {
        list.add(new Worker("Robert", 24, 3300));
    }

    // 删除姓名为 mark 的工人
    public void del(List<Worker> list, String name) {
        list.removeIf(worker -> worker.getName().equals(name));
    }

    // 使用 for 循环打印所有工人信息
    public void print(List<Worker> list) {
        for (Worker worker : list) {
            System.out.println("Workers info:" + worker.getName() + " " + worker.getAge() + " " + worker.getSalary());
        }
    }

    // 使用 Iterator 遍历并调用 work 方法
    public void callwork(List<Worker> list) {
        Iterator<Worker> iterator = list.iterator();
        while (iterator.hasNext()) {
            Worker worker = iterator.next();
            worker.work();
        }
    }
}

2.完整代码

java 复制代码

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

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

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

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

    // Getter 方法用于访问属性
    public String getName() {
        return name;
    }

    public int getAge() {
        return age;
    }

    public double getSalary() {
        return salary;
    }
}


class workerHelper {

    // 添加初始三个工人
    public void add(List<Worker> list) {
        list.add(new Worker("Tom", 18, 3000));
        list.add(new Worker("Peter", 25, 3500));
        list.add(new Worker("Mark", 22, 3200));
    }

    // 插入一个工人 Robert
    public void append(List<Worker> list) {
        list.add(new Worker("Robert", 24, 3300));
    }

    // 删除姓名为 mark 的工人
    public void del(List<Worker> list, String name) {
        list.removeIf(worker -> worker.getName().equals(name));
    }

    // 使用 for 循环打印所有工人信息
    public void print(List<Worker> list) {
        for (Worker worker : list) {
            System.out.println("Workers info:" + worker.getName() + " " + worker.getAge() + " " + worker.getSalary());
        }
    }

    // 使用 Iterator 遍历并调用 work 方法
    public void callwork(List<Worker> list) {
        Iterator<Worker> iterator = list.iterator();
        while (iterator.hasNext()) {
            Worker worker = iterator.next();
            worker.work();
        }
    }
}



public class Main {
    public static void main(String[] args) {
        workerHelper wh = new workerHelper();
        List<Worker> ls = new ArrayList<>();
        wh.add(ls);
        wh.append(ls);
        wh.del(ls, "Mark");
        wh.print(ls);
        wh.callwork(ls);
    }
}