class MainMenu{ Scanner MainMenusc = new Scanner(System.in); public int YourChoice; public void MainMenu(){ System.out.println("Welcome"); System.out.println("1. Quan ly sinh vien"); System.out.println("2. Quan ly diem"); System.out.println("3. Quan ly thong ke"); System.out.println(""); System.out.println("0. Thoat"); System.out.print("Vui long chon chuc nang muon su dung: "); YourChoice = MainMenusc.nextInt(); if(YourChoice==1){ Menu1 mn1 = new Menu1(); mn1.Menu1(); } } } class Menu1 extends MainMenu{ Scanner Menu1sc = new Scanner(System.in); public int YourChoice; public void Menu1(){ System.out.println("Welcome"); System.out.println("1. Nhap sinh vien moi"); System.out.println("2. Sua thong tin sinh vien"); System.out.println("3. Xoa sinh vien"); System.out.println(""); System.out.println("9. Return to main menu"); System.out.println("0. Thoat"); System.out.print("Vui long chon chuc nang muon su dung: "); YourChoice = Menu1sc.nextInt(); if(YourChoice==9){ MainMenu.MainMenu(); } } } class Menu2 extends MainMenu{ Scanner Menu2sc = new Scanner(System.in); public int YourChoice; public void Menu2(){ System.out.println("Welcome"); System.out.println("1. Nhap diem"); System.out.println("2. Sua diem"); System.out.println("3. Xoa diem"); System.out.println("4. Sap xep diem"); System.out.println(""); System.out.println("9. Return to main menu"); System.out.println("0. Thoat"); System.out.print("Vui long chon chuc nang muon su dung: "); YourChoice = Menu2sc.nextInt(); } } class Menu3 extends MainMenu{ Scanner Menu3sc = new Scanner(System.in); public int YourChoice; public void Menu3(){ System.out.println("Welcome"); System.out.println("1. Thong ke sinh vien"); System.out.println("2. Thong ke diem"); System.out.println(""); System.out.println("9. Return to main menu"); System.out.println("0. Thoat"); System.out.print("Vui long chon chuc nang muon su dung: "); YourChoice = Menu3sc.nextInt(); } } class Menu31 extends Menu3{ Scanner Menu31sc = new Scanner(System.in); public int YourChoice; public void Menu31(){ System.out.println("Welcome"); System.out.println("1. Tong so sinh vien"); System.out.println("2. Tong so sinh vien toan"); System.out.println("3. Tong so sinh vien ly"); System.out.println("4. Tong so sinh vien hoa"); System.out.println(""); System.out.println("9. Ve menu truoc"); System.out.println("0. Thoat"); System.out.print("Vui long chon chuc nang muon su dung: "); YourChoice = Menu31sc.nextInt(); } } class Menu32 extends Menu3{ Scanner Menu32sc = new Scanner(System.in); public int YourChoice; public void Menu32(){ System.out.println("Welcome"); System.out.println("1. So sinh vien gioi "); System.out.println("2. So sinh vien kha"); System.out.println("3. So sinh vien trung binh"); System.out.println("4. So sinh vien yeu"); System.out.println("5. Sinh vien co diem cao nhat"); System.out.println("6. Sinh vien co diem thap nhat"); System.out.println(""); System.out.println("9. Ve menu truoc"); System.out.println("0. Thoat"); System.out.print("Vui long chon chuc nang muon su dung: "); YourChoice = Menu32sc.nextInt(); } } //Class main class MainTask{ public static void main(String args[]){ /* stm = new StudentManager(); stm.InputInfo(); stm.ViewInfo();*/ MainMenu menu = new MainMenu(); menu.MainMenu(); } }
MainMenu mn = new Mainmenu
menu
MainMenu
Scanner
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