Problem E: List练习

1.题目描述

运用List完成下面的要求: 
1) 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 
2) 插入一个工人，信息为：姓名：Robert，年龄：24，工资3300 
3) 删除姓名为"Mark"的工人 
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，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

{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 Robertpublic 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

 

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 Robertpublic 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);}
}