Household accounting procedures (First Edition)

Project requirement ：

/*1. Suppose that the basic fund of family life is 10000 element

2. Income per registration （ menu 2） after , The amount of income should be added to the base Fund , And record the details of this income , For subsequent queries

3. Each registration expense （ menu 3） after , The amount of expenditure shall be deducted from the basic fund , And record the details of this expenditure , For subsequent queries .

4. Query revenue and expenditure details （ menu 1） when , All revenues will be displayed 、 Detailed list of expenditure names */

My implementation process ：

Console output option after fine tuning process ：

  As shown in the figure ,\t : Horizontal tabulation (HT) ( Skip to the next TAB Location ) .\t Tabs each blank 8 Complete the current string length to 8 Integer multiple , You can adjust the position of the options until they are centered .

 

 

import java.util.Objects;
import java.util.Scanner;

/*1. Suppose that the basic fund of family life is 10000 element 
2. Income per registration （ menu 2） after , The amount of income should be added to the base Fund , And record the details of this income , For subsequent queries 
3. Each registration expense （ menu 3） after , The amount of expenditure shall be deducted from the basic fund , And record the details of this expenditure , For subsequent queries .
4. Query revenue and expenditure details （  menu 1） when , All revenues will be displayed 、 Detailed list of expenditure names  */
public class FamilyLedger {
    public static void main(String[] args) {
//  Because of the use of hierarchical directories , So I will enter the steps I want to enter on the console , Import Scanner
        Scanner sc = new Scanner(System.in);
        System.out.println("---------------- Family income and expenditure accounting software -----------------");
        System.out.println("\t\t\t\t1  Income and expenditure details ");
        System.out.println("\t\t\t\t2  Registered income ");
        System.out.println("\t\t\t\t3  Registration indication ");
        System.out.println("\t\t\t\t4  refund   Out ");
        System.out.println(" Please select (1-4)：");
        int choice = sc.nextInt();

        //  Limit the scope 
        if (choice < 1 || choice > 4) {
            System.out.println(" The content you entered is incorrect ！");
        }

        // Because in addition to the initial capital fixed at the beginning , There will be dynamic changes in the future 
        // Initial bill 
        int start = 0;
        if (choice == 1) {
            Scanner a = new Scanner(System.in);
            System.out.println(" Please enter the initial amount ：");
            start = a.nextInt();
        }

        // The income bill 
        int income = 0;
        String source = "";
        if (choice == 2) {
            Scanner a = new Scanner(System.in);
            System.out.println(" Please enter the revenue amount ：");
            System.out.println(" Please enter the source of income ：");
            income = a.nextInt();
            source = a.next();
        }
        // Expense bills 
        int expenditure = 0;
        String reason = "";
        if (choice == 3) {
            Scanner b = new Scanner(System.in);
            System.out.println(" Please enter the expense amount ：");
            System.out.println(" Please enter the expense reason ：");
            expenditure = b.nextInt();
            reason = b.next();
        }


        // Because it involves jumping to the corresponding menu , Here, select... In the process control statement switch sentence 
        switch (choice) {
            case 1:
                System.out.println("---------------- Your income and expenditure details ----------------");
                System.out.println("\t\t\t\t Initial funding " + start + " element ");
                break;
            case 2:
                System.out.println(" Income and expenditure \t" + " Total account amount \t\t" + " The amount of income \t\t" + " explain ");
                System.out.println(" income \t" + (10000 + income) + "\t\t\t" + (+income) + "\t\t\t" + source);
                break;
            case 3:
                System.out.println(" Income and expenditure \t" + " Total account amount \t\t" + " The amount of income \t\t" + " explain ");
                System.out.println(" income \t" + (10000 - expenditure) + "\t\t\t" + (-expenditure) + "\t\t\t" + reason);
                break;
            case 4:
                // Exit the screen 
                String exit = "";
                Scanner c = new Scanner(System.in);
                System.out.println(" Are you sure you want to exit this login interface ？");
                System.out.println(" Definite exit （y）/ No , I'll think about it again （n）：");
                exit = c.next();
                if (Objects.equals(exit, "y")) {
                    System.out.println(" You have exited the menu ！");
                    return;
                } else if (Objects.equals(exit, "n")) {
                    System.out.println(" You have entered the menu ！");
                    break;
                }
        }

    }
}

Output results ：

Output 1 The situation of ：

Output 2 The situation of ： 

Output 3 The situation of ：

Output 4 The situation of ：