Java实现家庭收支记录软件

刺骨的言语ヽ痛彻心扉 2023-10-05 13:01 14阅读 0赞

Java实现家庭收支记录软件  
先编写工具类  
Utilityimport java.util.Scanner;  
/\*\*  
Utility工具类：  
将不同的功能封装为方法，就是可以直接通过调用方法使用它的功能，而无需考虑具体的功能实现细节。  
*/  
public class Utility \{  
private static Scanner scanner = new Scanner(System.in);  
/*\*  
用于界面菜单的选择。该方法读取键盘，如果用户键入’1’-’4’中的任意字符，则方法返回。返回值为用户键入字符。  
*/  
public static char readMenuSelection() \{  
char c;  
for (; ; ) \{  
String str = readKeyBoard(1);  
c = str.charAt(0);  
if (c != ‘1’ && c != ‘2’ && c != ‘3’ && c != ‘4’) \{  
System.out.print(“选择错误，请重新输入：”);  
\} else break;  
\}  
return c;  
\}  
/*\*  
用于收入和支出金额的输入。该方法从键盘读取一个不超过4位长度的整数，并将其作为方法的返回值。  
*/  
public static int readNumber() \{  
int n;  
for (; ; ) \{  
String str = readKeyBoard(4);  
try \{  
n = Integer.parseInt(str);  
break;  
\} catch (NumberFormatException e) \{  
System.out.print(“数字输入错误，请重新输入：”);  
\}  
\}  
return n;  
\}  
/*\*  
用于收入和支出说明的输入。该方法从键盘读取一个不超过8位长度的字符串，并将其作为方法的返回值。  
\*/  
public static String readString() \{  
String str = readKeyBoard(8);  
return str;  
\}

/**
    用于确认选择的输入。该方法从键盘读取‘Y’或’N’，并将其作为方法的返回值。
    */
    public static char readConfirmSelection() {
        char c;
        for (; ; ) {
            String str = readKeyBoard(1).toUpperCase();
            c = str.charAt(0);
            if (c == 'Y' || c == 'N') {
                break;
            } else {
                System.out.print("选择错误，请重新输入：");
            }
        }
        return c;
    }
    
    
    private static String readKeyBoard(int limit) {
        String line = "";

while (scanner.hasNext()) \{  
line = scanner.nextLine();  
if (line.length() < 1 || line.length() > limit) \{  
System.out.print(“输入长度（不大于” + limit + “）错误，请重新输入：”);  
continue;  
\}  
break;  
\}  
  
return line;  
\}  
\}  
**搭建框架**  
class FamilyAccount  
\{  
public static void main(String\[\] args)  
\{  
boolean isFlag=true;  
//用于记录用户的收入和支出的详情  
String details=“收支\\t账户金额\\t收支金额\\t说 明\\n”;  
int counter=1000;  
do  
\{  
//软件框架  
System.out.println("-------------------家庭收支记账软件---------------------\\n");  
System.out.println(" 1 收支明细");  
System.out.println(" 2 登记收入");  
System.out.println(" 3 登记支出");  
System.out.println(" 4 退 出");  
System.out.println();  
System.out.print(" 请选择（1-4）：");  
  
char selection=Utility.readMenuSelection();//获取一个字符  
switch (selection)  
\{  
case ‘1’:  
//System.out.println(“收支明细”);  
System.out.println("-------------------家庭收支记账软件---------------------");  
//System.out.println(“收支\\t账户金额\\t收支金额\\t说 明\\n”);  
System.out.println(details);  
break;  
case ‘2’:  
//System.out.println(“登记收入”);  
System.out.println("-------------------家庭收支记账软件---------------------");  
System.out.print(“收入金额：”);  
int inMoney=Utility.readNumber();  
System.out.print(“收入说明：”);  
String infoMoney=Utility.readString();  
//处理counter  
counter+=inMoney;  
//处理details变量  
details+=(“收入\\t”+counter+"\\t\\t"+inMoney+"\\t\\t"+infoMoney+"\\n");  
System.out.println("----------------------登记完成--------------------------\\n");  
break;  
case ‘3’:  
//System.out.println(“登记支出”);  
System.out.println("-------------------家庭收支记账软件---------------------");  
System.out.print(“支出金额：”);  
int outMoney=Utility.readNumber();  
System.out.print(“支出说明：”);  
String outMoneyReason=Utility.readString();  
//处理counter  
if (counter>=outMoney)  
\{  
counter-=outMoney;  
\}else\{  
System.out.println(“支出金额超过总金额，支付失败！\\n”);  
\}  
counter-=outMoney;  
//处理details变量  
details+=(“支出\\t”+counter+"\\t\\t"+outMoney+"\\t\\t"+outMoneyReason+"\\n");  
System.out.println("----------------------登记完成--------------------------\\t");  
break;  
case ‘4’:  
//System.out.println(“退出”);  
System.out.println(“确认是否退出（Y/N）：”);  
char isExit=Utility.readConfirmSelection();  
if (isExit==‘Y’)  
\{  
isFlag=false;  
\}  
//break;  
\}

}
        while(isFlag==true);
    }

\}  
实现功能框架：  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NjQyOTI5MA_size_16_color_FFFFFF_t_70_pic_center]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NjQyOTI5MA_size_16_color_FFFFFF_t_70_pic_center 1]  
**3、登记支出**  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NjQyOTI5MA_size_16_color_FFFFFF_t_70_pic_center 2]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NjQyOTI5MA_size_16_color_FFFFFF_t_70_pic_center 3]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NjQyOTI5MA_size_16_color_FFFFFF_t_70_pic_center 4]

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