JAVA 学生管理系统

"-----学生管理系统-----"

"功能选项："

"1：新增学生"

"2：删除学生"

"3：修改学生"

"4：查找学生"

"5：查看全部学生"

"6：退出"

public class 学生管理系统 {
    public static void main(String[] args) {
        String[] name1 = new String[100];
        int[] chengji1 = new int[100];
        int count = 0;
        while (true) {
            int choose = chooseFunction();
            switch (choose) {
                case 1:
                    count = add(name1, chengji1, count);
                    break;
                case 2:
                    count = delete(name1, chengji1, count);
                    break;
                case 3:
                    change(name1, chengji1, count);
                    break;
                case 4:
                    find(name1, chengji1, count);
                    break;
                case 5:
                    update(name1, chengji1, count);
                    break;
                case 6:
                    exit();
                    return;
                default:
                    System.out.println("----------------------------------");
                    System.out.println("功能选择有误，请输入正确的功能序号!");
                    break;
            }
        }
    }
        public static int chooseFunction() {
            System.out.println("-----学生管理系统-----");
            System.out.println("功能选项：");
            System.out.println("1：新增学生");
            System.out.println("2：删除学生");
            System.out.println("3：修改学生");
            System.out.println("4：查找学生");
            System.out.println("5：查看全部学生");
            System.out.println("6：退出");
            //接收键盘输入的功能选项序号
            Scanner sc = new Scanner(System.in);
            System.out.print("请输入选项：");
            int choose = sc.nextInt();
            return choose;
        }
        public static int add(String[]name1,int[]chengji1,int count){
            System.out.print("添加人姓名：");
            name1[count]=new Scanner(System.in).next();
            System.out.print("添加人成绩：");
            chengji1[count]=new Scanner(System.in).nextInt();
            System.out.println("添加成功");
            count++;
            System.out.println("添加数量为："+count+"  ");
            return count;

        }
        public static void update(String[]name1,int[]chengji1,int count){
        for (int i=0;i<count;i++){
            System.out.println("姓名    成绩");
            System.out.println(name1[i]+"    "+chengji1[i]);
        }
        }
        public static int delete(String[]name1,int[]chengji1,int count){
            System.out.print("请输入需要删除的学生： ");
            String n=new Scanner(System.in).next();
            for(int i=0;i<count;i++){
                if (n.equals(name1[i])){
                   name1[i]=name1[i+1];
                   chengji1[i]=chengji1[i+1];
                }
            }
            count-=1;
            System.out.println("删除学生"+n+"成功");
            return count;

    }
        public static void change(String[]name1,int[]chengji1,int count){
            System.out.print("输入要修改的学生姓名：");
            String name=new Scanner(System.in).next();
            for (int i=0;i<count;i++){
                if (name.equals(name1[i])){
                    System.out.println("原姓名:  "+name1[i]+"原成绩:  "+chengji1[i]);
                    System.out.print("输入修改的姓名：");
                    name1[i] = new Scanner(System.in).next();
                    System.out.print("输入修改的成绩：");
                    chengji1[i] = new Scanner(System.in).nextInt();
                    System.out.println("修改成功");
                    return;
                }
            }System.out.println("查无此人");
        }
        public static void find(String[]name1,int[]chengji1,int count){
            System.out.print("请输入需要查找的学生姓名：  ");
            String name=new Scanner(System.in).next();
                for (int i=0;i<count;i++){
                    if (name.equals(name1[i])){
                         System.out.println("学生:  "+name1[i]+"成绩:  "+chengji1[i]);
                         return;
                    }
                }
                System.out.println("查无此人");
        }
        public static void exit(){
        System.out.println("----------------退出---------------");
        System.out.println("您已退出系统");
    }
}