Projekt - die Verwendung von Sammlungen

import java.util.ArrayList;
import java.util.Scanner;

//Iterator  迭代器
//hasNext
//用集合完成以下功能
//1.查询所有员工信息
//2.增加新员工
//3.输入员工工号修改员工数据
//3.1.修改姓名
//3.2.修改年龄
//3.3.修改肤色
//3.4.修改工号
//4.删除员工
//5.查询员工
//5.1.以姓名关键字查询
//5.2.以年龄范围查询
//5.3.以颜色查询
//5.4.以工号查询
public class Demo1 {
    static ArrayList<Person> data = new ArrayList<>();
    static Scanner input = new Scanner(System.in);

    static {
        data.add(new Person("张三", 23, "黄色", 10016));
        data.add(new Person("李四", 32, "黄色", 10086));
    }

    public static void main(String[] args) {
        System.out.println("是否开启程序：\n0.退出程序\n1.开启程序\n");
        int num = input.nextInt();
        if (num == 1) {
            while (true) {
                System.out.println("请输入需要执行的指令：");
                System.out.println("0.退出程序\n1.查询所有员工信息\n2.增加新员工\n3.输入员工工号修改员工数据\n4.删除员工\n5.查询员工");
                int dir = input.nextInt();
                if (dir == 0) {
                    break;
                } else if (dir == 1) {
                    staffInquire();
                } else if (dir == 2) {
                    staffAdd();
                } else if (dir == 3) {
                    staffRevise();
                } else if (dir == 4) {
                    staffDel();
                } else if (dir == 5) {
                    staffKey();
                } else {
                    throw new DirectivesException("指令" + dir + "不存在");
                }
            }
        } else {
            return;
        }
    }

    public static void staffInquire() {
        for (Person per : data) {
            System.out.println(per);
        }
    }

    public static void staffAdd() {
        System.out.println("请输入需要新增的人员信息，中间以‘-’隔开，例如：姓名-年龄-肤色-工号");
        String staff = input.next();
        String[] sta = staff.split("-");
        data.add(new Person(sta[0], Integer.parseInt(sta[1]), sta[2], Integer.parseInt(sta[3])));
    }

    public static void staffRevise() {
        System.out.println("请输入需要更改人员的工号：");
        int number = input.nextInt();
        for (int i = 0; i < data.size(); i++) {
            if (data.get(i).getJobNo() == number) {
                while (true) {
                    System.out.println("请输入指令：");
                    System.out.println("0.返回\n1.修改姓名\n2.修改年龄\n3.修改肤色\n4.修改工号");
                    int choose = input.nextInt();
                    if (choose == 0) {
                        break;
                    } else if (choose == 1) {
                        System.out.println("请输入需要修改成的姓名：");
                        data.get(i).setName(input.next());
                    } else if (choose == 2) {
                        System.out.println("请输入需要修改成的年龄：");
                        data.get(i).setAge(input.nextInt());
                    } else if (choose == 3) {
                        System.out.println("请输入需要修改成的肤色：");
                        data.get(i).setColor(input.next());
                    } else if (choose == 4) {
                        System.out.println("请输入需要修改成的工号：");
                        data.get(i).setJobNo(input.nextInt());
                    } else {
                        throw new DirectivesException("不存在此指令");
                    }
                }
            }
        }
    }

    public static void staffDel() {
        /*//删除所有员工——迭代器
        Iterator<Person> its = data.iterator();
        while (its.hasNext()){
            Person str = its.next();
            System.out.println(str);
            its.remove();
        }
        System.out.println(data.size());*/
        System.out.println("请输入需要删除的员工工号");
        int number = input.nextInt();
        for (int i = 0; i < data.size(); i++) {
            if (data.get(i).getJobNo() == number) {
                data.remove(i);
            }
        }
    }

    public static void staffKey() {
        while (true) {
            System.out.println("请输入需要查询的指令:");
            System.out.println("0.返回主界面\n1.以姓名关键字查询\n2.以年龄范围查询\n3.以肤色查询\n4.以工号查询");
            int choose = input.nextInt();
            if (choose == 0) {
                break;
            } else if (choose == 1) {
                System.out.println("请输入姓名关键字进行查询");
                String name = input.next();
                for (Person per : data) {
                    if (per.getName().contains(name)) {
                        System.out.println(per);
                    }
                }
            } else if (choose == 2) {
                System.out.println("请输入低位年龄：");
                int age1 = input.nextInt();
                System.out.println("请输入高位年龄：");
                int age2 = input.nextInt();
                for (Person per : data) {
                    if (per.getAge() >= age1 && per.getAge() <= age2) {
                        System.out.println(per);
                    }
                }
            } else if (choose == 3) {
                System.out.println("请输入肤色进行查询：");
                String color = input.next();
                for (Person per : data) {
                    if (per.getColor().equals(color)) {
                        System.out.println(per);
                    }
                }
            } else if (choose == 4) {
                System.out.println("请输入需要查询的工号：");
                int jobNo = input.nextInt();
                for (Person per : data) {
                    if (per.getJobNo() == jobNo) {
                        System.out.println(per);
                    }
                }
            } else {
                throw new DirectivesException("不存在此指令");
            }
        }
    }
}
class DirectivesException extends RuntimeException{
    public DirectivesException() {
    }

    public DirectivesException(String message) {
        super(message);
    }
}

class Person {
    private String name;
    private int age;
    private String color;
    private int jobNo;

    public Person() {
    }

    public Person(String name, int age, String color, int jobNo) {
        this.name = name;
        this.age = age;
        if (age <= 0 || age >= 150){
            throw new DirectivesException("年龄不合理，范围应在0-150之间");
        }
        this.color = color;
        this.jobNo = jobNo;
    }

    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;
        if (age <= 0 || age >= 150){
            throw new DirectivesException("年龄不合理，范围应在0-150之间");
        }
    }

    public String getColor() {
        return color;
    }

    public void setColor(String color) {
        this.color = color;
    }

    public int getJobNo() {
        return jobNo;
    }

    public void setJobNo(int jobNo) {
        this.jobNo = jobNo;
    }

    @Override
    public String toString() {
        return "{" +
                "姓名：'" + name + '\'' +
                ", 年龄：" + age +
                ", 肤色：'" + color + '\'' +
                ", 工号：" + jobNo +
                '}';
    }
}