快递E栈01（变量、流程控制、数组）

功能介绍:

　　1. 角色切换(快递员和普通用户)

　　

 　　

 　　快递员功能:存快递，删除快递，修改快递，查看所有快递

　　普通用户功能:取快递

　　2. 存快递 

　　

 　　3.删除快递

　　

 　　4.修改快递

　　

 　　5.查看所有快递

　　

 　　6.取快递

　　

 　　代码：

　　

import java.util.Random;
import java.util.Scanner;

public class Express {

    private static Scanner scanner = new Scanner(System.in);
    static Express5[] ex = new Express5[10];
    public static void add() {
        System.out.println("请输入快递单号：");
        int tracking0 = scanner.nextInt();
        System.out.println("请输入公司名称：");
        String company0 = scanner.next();
        Express5 e = new Express5();
        int c = code();
        e.setCode(c);
        e.setCompany(company0);
        e.setNumber(tracking0);
        for (int i = 0; i < ex.length; i++) {
            if (ex[i] == null) {
                ex[i]=e;
                break;
            }
        }
        System.out.println("快递已存入，取件码是："+c);
    }
    public static int code() {
        Random random = new Random();
        return random.nextInt(899) + 100;
    }
    public static void delete() {
        System.out.println("请输入要删除的快递单号：");
        int tracking1 = scanner.nextInt();
        for(int i = 0;i < ex.length;i ++) {
            if(ex[i] == null) {
                System.out.println("未找到快递");
                break;
            }else if(ex[i].getNumber() == tracking1) {
                ex[i] = null;
                System.out.println("删除成功");
                break;
            }
        }
    }
    public static void change() {
        System.out.println("请输入要修改的快递单号：");
        int tracking1 = scanner.nextInt();
        for(int i = 0;i < ex.length;i ++) {
            Express5 e = new Express5();
            if(ex[i] == null) {
                System.out.println("未找到快递");
                break;
            }else if(ex[i].getNumber() == tracking1) {
                System.out.println("请输入新的快递单号：");
                int tracking3 = scanner.nextInt();
                System.out.println("请输入新的公司名称：");
                String company1 = scanner.next();
                e.setCode(code());
                e.setNumber(tracking3);
                e.setCompany(company1);
                ex[i] = e;
                System.out.println("修改成功");
                break;
            }
        }
    }

    public static void find() {
        System.out.println("所有快递信息如下：");
        System.out.println("快递单号    公司名称    取件码");
        for (int i = 0; i < ex.length; i++) {
            if (ex[i] != null) {
                System.out.println(ex[i].number + "      " + ex[i].company + "       " + ex[i].code);
            }
        }
    }

    public static void delete2() {
        System.out.println("请输入取件码：");
        int tracking1 = scanner.nextInt();
        for(int i = 0;i < ex.length;i ++) {
            if(ex[i] == null) {
                System.out.println("未找到快递");
                break;
            }else if(ex[i].getCode() == tracking1) {
                ex[i] = null;
                System.out.println("取件成功");
                break;
            }
        }
    }

    public static void main(String[] args) {
        while(true) {
            System.out.println("=====欢迎使用快递柜=====");
            System.out.println("请输入您的身份：1-快递员，2-用户");
            Scanner scanner = new Scanner(System.in);
            int a = scanner.nextInt();
                if(a == 1) {
                    System.out.println("请选择操作：1-存快递 2-删除快递 3-修改快递信息 4-查看所有快递");
                    int b = scanner.nextInt();
                    if (b == 1) {
                        add();
                    } else if (b == 2) {
                        delete();
                    } else if (b == 3) {
                        change();
                    } else if (b == 4) {
                        find();
                    } else {
                        System.out.println("输入有误，请重新输入");
                    }
                }else if(a == 2) {
                    delete2();
                }
        }
        
    }
}



class Express5 {

    int code;
    String company;
    int number;

    public int getCode() {
        return code;
    }

    public void setCode(int code) {
        this.code = code;
    }

    public String getCompany() {
        return company;
    }

    public void setCompany(String company) {
        this.company = company;
    }

    public int getNumber() {
        return number;
    }

    public void setNumber(int number) {
        this.number = number;
    }
}