java Bank Account Management Project.

java Bank Account Management Project.

import java.util.*;
/**
 *
 * @author Shohan
 * Bank Account Class
 * // Main ClassName -- "Main"
 * // Add interest feature by @korrio
 */

class Account{
    String name,acc_type;
    int Acc_num,Acc_Balance;
    Account(){

    }
        Account(String n,int acc_num,int b,String a_t){
            name=n;
            Acc_num=acc_num;
            Acc_Balance=b;
            acc_type=a_t;
        }
} // end class

class create_account extends Account{
    create_account(String n,int acc_num,int b,String a_t){ // pass name and account type
            name=n;
            Acc_num=acc_num;
            Acc_Balance=b;
            acc_type=a_t;
    }
    create_account(){
        super();
    }

    void insert(String n,int acc_num,String a_t){ // input user name, account number and type
        name=n;
        acc_type=a_t;
        Acc_num=acc_num; // generate random number
        Acc_Balance=0;
    }

    void display_details(){
        System.out.println("Depositor Name :" +name);
        System.out.println("Account Number : "+Acc_num);
        System.out.println("Account Balance : "+Acc_Balance);
        System.out.println("Account Type : "+acc_type);
        System.out.println("Interest : 1.65%");
    }

        void deposite(int acc_num,int money){
                Acc_Balance=money;
        }

        int withdraw(int withd){
                Acc_Balance=Acc_Balance-withd;
                return Acc_Balance;
        }

} // end class

public class Main {
    public static void main(String args[]){
        String user_name=null,type;
        type = null;
        int balance=0,tmp=0;
        int withd=0,cb=0;
        int totalYear = 0;
// to generate Random Account Number
int aNumber = 0;
aNumber = (int)((Math.random() * 9000)+1000);

        create_account user = new create_account("user",0,0,"savings"); // initilaize -- name,acc_number,Balance,Type

            Scanner in = new Scanner(System.in);
            Scanner strng=new Scanner(System.in);
            int userChoice;
            boolean quit = false;

            do {
                  System.out.println("1. Create Account");
                  System.out.println("2. Deposit money");
                  System.out.println("3. Withdraw money");
                  System.out.println("4. Check balance");
                  System.out.println("5. Display Account Details");
                  System.out.println("6. Increase year \n");
                  System.out.println("0. to quit: \n");
                  System.out.print("Enter Your Choice : ");
                  userChoice = in.nextInt();
                  switch (userChoice) {

                  case 1:
                        System.out.print("Enter your Name : ");
                        user_name=strng.nextLine();
                        System.out.print("Enter Accout Type : ");
                        type=in.next();
                        user.insert(user_name, aNumber, type);  // inserted
                        System.out.println("\n\tYour Account Details\n\tDont Forget Account Number\n");
                        System.out.println("**************************");
                        user.display_details();
                        break;

                case 2: // deposite
                    System.out.print("Enter your account Number : ");
                    tmp=in.nextInt();
                 if(tmp==user.Acc_num){
                 System.out.print("Enter Amount Of Money : ");
                 balance=in.nextInt();
                 user.Acc_Balance=balance;
                 System.out.println("\t Successfully Deposited.");
              }
                     else
                    System.out.println("Wrong Accoount Number.");
                   break;

                  case 3: // withdraw money
                     System.out.print("Enter your account Number : ");
                      tmp=in.nextInt();

                          if(tmp==user.Acc_num){
                             if(user.Acc_Balance==0)
                             System.out.print("Your Account is Empty.");

                             else{
                             System.out.print("Enter Amout Of Money : ");
                             withd=in.nextInt();

                             if(withd>user.Acc_Balance){
                             System.out.print("Enter Valid Amout of Money : ");
                             withd=in.nextInt();
                             }
                             else
                             cb= user.withdraw(withd);
                             System.out.println("Your Current Balance : "+cb);
                             }
                          }
                             else
                             System.out.println("Wrong Accoount Number.");
                        break;

                  case 4: // check balance

                      System.out.print("Enter your Account Number : ");
                      tmp=in.nextInt();

                             if(tmp==user.Acc_num){
                             System.out.println("Your Current Balance : "+user.Acc_Balance);
                             }
                             else
                             System.out.println("Wrong Accoount Number.");
                      break;

                  case 5: // display all info

                      System.out.print("Enter your Account Number :");
                      tmp=in.nextInt();
                             if(tmp==user.Acc_num){
                             user.display_details();
                        }else
                             System.out.println("Wrong Accoount Number.");

                      break;
                  case 6:
                    System.out.print("Increase year :");
                    tmp=in.nextInt();
                    totalYear += tmp;
                    if(tmp >= 1) {
                      balance = user.Acc_Balance;
                      balance = (int) (balance + (balance * 0.0165 * tmp));
                      //transaction
                      //verify ? parties
                      //commit blockchain
                      user.Acc_Balance = balance;
                      System.out.println("Your Current Balance : "+user.Acc_Balance);
                      System.out.println("Total saving day(s) : "+ (totalYear * 365));
                    }
                    break;
                  case 0:
                        quit = true;
                        break;
                  default:
                        System.out.println("Wrong Choice.");
                        break;
                  }
                  System.out.println("\n");
            } while (!quit);
            System.out.println("Thanks !");

     } //  end main function

} //  end mian class