Java DVD租借系统

项目要求：
在控制台输出一个DVD管理系统
拥有六个功能：
1、新增
2、查看
3、删除
4、借出
5、归还
6、退出

源码：
DVD类：

public class DVD {



    //DVD类
    private String name;
    private int state;
    private int date;
    private int count;


    //private表示私有，增加安全性


    //无参方法
    public DVD() {

    }

    //有参构造
    public DVD(String name, int state, int date, int count) {
        this.name = name;
        this.state = state;
        this.date = date;
        this.count = count;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getState() {
        return state;
    }

    public void setState(int state) {
        this.state = state;
    }

    public int getDate() {
        return date;
    }

    public void setDate(int date) {
        this.date = date;
    }

    public int getCount() {
        return count;
    }

    public void setCount(int count) {
        this.count = count;
    }


//toString方法

    @Override
    public String toString() {
        return "DVD [name='" + name +
                ", state=" + state +
                ", date=" + date +
                ", count=" + count +
                ']';
    }
}

实现类：

public class newGongNeng {

    DVD[] dvd = new DVD[6];

    //初始化
    void chushihuan() {
        dvd[0] = new DVD("诡秘之主", 1, 0, 18);
        dvd[1] = new DVD("完美世界", 0, 0, 22);
        dvd[2] = new DVD("悲惨世界", 0, 0, 10);
    }

    void qidong() {
        Scanner s = new Scanner(System.in);

        //菜单
        System.out.println("------------------------------");
        System.out.println("|-----欢迎使用 DVD租借器-----|");
        System.out.println("------------------------------");
        System.out.println("|           1.新增           |");
        System.out.println("|           2.查看           |");
        System.out.println("|           3.删除           |");
        System.out.println("|           4.租借           |");
        System.out.println("|           5.归还           |");
        System.out.println("|           6.退出           |");
        System.out.println("------------------------------");
        System.out.println("请选择：");
        int xuhao = s.nextInt();

        switch (xuhao) {
            case 1://新增
                xinzeng();
                fanhui();
                break;
            case 2://查看
                chakan();
                fanhui();
                break;
            case 3://删除
                shanchu();
                fanhui();
                break;
            case 4://租借
                zujie();
                fanhui();
                break;
            case 5://归还
                guihuan();
                fanhui();
                break;
            case 6://退出
                System.out.println("再见！");
                break;
            default:
                System.out.println("输入错误！");
        }

    }


    //返回方法
    void fanhui() {
        System.out.println("------------------------------------");
        System.out.println("返回输入0");
        Scanner s = new Scanner(System.in);
        //判断输入的是否为0
        if (s.nextInt() == 0) {
            qidong();
        } else {
            System.out.println("输入错误！");
            //失败的话重新调用，递归
            fanhui();
        }


    }

    //新增
    void xinzeng() {
        Scanner s = new Scanner(System.in);
        System.out.println("新增");
        System.out.print("请输入名称：");
        //获取输入的名称
        String name = s.next();
        //使用for循环查找内容为空的DVD
        for (int i = 0; i < dvd.length; i++) {
            //如果查找到为空的DVD 就将输入名称赋给它
            if (dvd[i] == null) {
                dvd[i] = new DVD(name, 0, 0, 0);
                System.out.println("成功！");
                break;
            }
        }
    }

    //查看
    void chakan() {
        System.out.println("查看");
        System.out.println("序号\t状态\t名称\t\t日期\t次数");
        //循环遍历整个数组
        for (int i = 0; i < dvd.length; i++) {
            //如果不为空，将判断是否借出的属性转换为文本
            if (dvd[i] != null) {
                String x = null;
                //如果stata为1 便为已借出
                if (dvd[i].getState() == 1) {
                    x = "已借出";
                } else if (dvd[i].getState() == 0) {
                    x = "未借出";
                }
                //打印
                System.out.println((i + 1) + "\t" + "\t" + x + "\t" + dvd[i].getName() + "\t" + dvd[i].getDate() + "号" + "\t" + "\t" + dvd[i].getCount() + "次");
            }
        }

    }

    //删除
    void shanchu() {
        Scanner s = new Scanner(System.in);
        System.out.println("删除");
        System.out.print("删除的名称：");
        //获得要删除的名称
        String name = s.next();
        //设一个o判断条件
        int o = -1;
        //遍历寻找名称对应的DVD
        for (int i = 0; i < dvd.length; i++) {
            if (dvd[i] != null) {
                if (dvd[i].getName().equals(name)) {
                    o = i;
                    break;
                }
            }
        }
        //如果找到对应DVD
        if (o != -1) {
            //如果已借出，则失败
            if (dvd[o].getState() == 1) {
                System.out.println("DVD已借出，暂时不能删除.");
            } else if (dvd[o].getState() == 0) {
                System.out.println("删除成功！");
                dvd[o] = null;
            }
        } else if (o == -1) {//没有找到
            System.out.println("没有此DVD");
        }
    }

    void zujie() {
        Scanner s = new Scanner(System.in);
        System.out.println("租借");
        System.out.print("输入租借的名称：");
        String name = s.next();
        int o = -1;
        for (int i = 0; i < dvd.length; i++) {
            if (dvd[i] != null) {
                if (dvd[i].getName().equals(name)) {
                    o = 1;
                    break;
                }
            }
        }
        if (o != -1) {
            if (dvd[o].getState() == 1) {
                System.out.println("DVD已借出.");
            } else if (dvd[o].getState() == 0) {
                System.out.print("输入日期：");
                int date = s.nextInt();
                dvd[o].setDate(date);
                dvd[o].setCount(dvd[o].getCount() + 1);
                dvd[o].setState(1);
                System.out.println("租借成功 ！");
            }

        } else if (o == -1) {
            System.out.println("没有此DVD");
        }

    }

    void guihuan() {
        Scanner s = new Scanner(System.in);
        System.out.println("归还");
        System.out.print("归还名称：");
        String name = s.next();
        int o = -1;
        for (int i = 0; i < dvd.length; i++) {
            if (dvd[i] != null) {
                if (dvd[i].getName().equals(name)) {
                    o = 1;
                    break;
                }
            }
        }
        if (o != -1) {
            if (dvd[o].getState() == 1) {
                System.out.print("输入日期 ：");
                int data = s.nextInt();
                System.out.println("租金为：" + (data - dvd[o].getDate()) * 2 + "元");
                dvd[o].setState(0);
                dvd[o].setDate(0);
            } else if (dvd[o].getState() == 0) {
                System.out.println("此DVD没有借出，归还失败");
            }

        } else if (o == -1) {
            System.out.println("没有此DVD");
        }

    }

}

本文地址：https://blog.csdn.net/qq_40469797/article/details/107662570