Add new file

bank.java

+
+
+/**
+ * 1.用户登录界面,若用户输入ID passWord和预定义初始化ID相符，进入用户自定义操作界面 User_Inter()
+ * 2.Switch分支,进入不同的分系统,查询,存款,取款,退出
+ * 3.查询:系统输出存款,初始化存款由Math.random()方法随机生成,结束后返回User_Inter()
+ * 4.存款:用户输入存款数额,进行存款自增计算,并更新存款数据,结束后返回User_Inter()
+ * 5.取款:判断，若取款数额大于账户存款数额,则重新执行用户输入,若取款成功，则执行存款自减计算,并更新存款数据,结束后返回User_Inter()
+ * 6.退出,利用延时算法,线程休眠2000ms后执行System。exit(0);并最终退出整个程序
+ */
+
+import java.util.Scanner;
+
+
+//import static java.lang.System.*;
+
+//定义ID 和 passWord常量
+//abstract class constInt {
+//    public static final int fadt_ID = 123;
+//    public static final int fast_passWord = 321;
+//}
+
+
+public class bank {
+    private static boolean isTrue;            //判断是否正确
+    private static double Balance = Math.random() * 1000;          //账户余额
+    private static double Deposit;          //取钱模块
+    private static double Withdrawal;       //存钱模块
+    private static String fadt_ID = "123";                //初始化ID
+    private static String fast_passWord = "321";          //初始化passWord
+
+    //查询函数
+    static void Inquire() {
+        System.out.println("您账户的当前余额为：" + Balance);
+        User_Inter();
+    }
+
+
+    //取款函数
+    static void Withdrawal() {
+        System.out.println("欢迎进入取款页面，请输入取款金额");
+        Scanner in = new Scanner(System.in);
+        while (true) {
+            //获取存款金额
+            System.out.println("请输入您要取出的金额：");
+
+            double Withdrawal = in.nextDouble();
+
+
+            if (Balance < Withdrawal) {
+                System.out.println("余额不足，请重新输入");
+                break;
+            }
+            Balance = Balance - Withdrawal;
+
+            System.out.println("您取出了" + Withdrawal + "元" + "现在共有存款" + Balance);         //显示剩余余额
+
+            System.out.println("继续请输入1,退出请输入0");         //获取是否继续存款1或者0
+            Scanner sc = new Scanner(System.in);
+            int jx = sc.nextInt();
+            if (jx == 0) {
+                User_Inter();
+                return;
+            } else {
+                Withdrawal();
+            }
+            User_Inter();
+        }
+    }
+
+    //存钱函数
+    static void Deposit() {
+        while (true) {
+            System.out.println("欢迎进入存款页面，请输入取款金额");
+            Scanner in = new Scanner(System.in);
+            double Deposit = in.nextDouble();
+            Balance = Balance + Deposit;
+            System.out.println("您存入了" + Deposit + "元" + "现在共有存款" + Balance);
+            System.out.println("继续请输入1,退出请输入0");         //获取是否继续存款1或者0
+            Scanner sc = new Scanner(System.in);
+            int jx = sc.nextInt();
+            if (jx == 0) {
+                User_Inter();
+                return;
+            } else {
+                Deposit();
+            }
+            User_Inter();
+        }
+    }
+
+    //用户自定义操作函数
+    static void User_Inter() {
+        System.out.println("1.查询账户");
+        System.out.println("2.存款");
+        System.out.println("3.取款");
+        System.out.println("4.退出");
+        System.out.println("请选择您的业务");
+        Scanner in = new Scanner(System.in);
+        int Inter = in.nextInt();
+        //当boolean判断为true
+//        while (true) {
+
+        switch (Inter) {                 //switch选择自定义操作
+            case 1:
+                Inquire();//查询函数
+                break;
+            case 2:
+                Deposit();//存款函数
+                break;
+            case 3:
+                Withdrawal();//取款函数
+                break;
+            case 4:
+                System.out.println("感谢使用，系统将在两秒后自动退出，欢迎下次光临!");
+
+                try {        //延时2秒，线程停滞
+                    Thread.sleep(2000);
+                } catch (InterruptedException e) {
+// TODO Auto-generated catch block
+                    e.printStackTrace();
+                }
+
+
+                System.exit(0);      //退出程序
+        }
+//        }
+    }
+
+
+    public static void main(String[] args) {
+        System.out.println("**********欢迎使用中国银行ATM**********");
+
+        for (int i = 0; i < 3; i++) {
+            System.out.println("请输入你的ID:");
+            Scanner in = new Scanner(System.in);
+            String ID = in.next();
+            System.out.println("请输入你的密码:");
+            Scanner s = new Scanner(System.in);
+            String passWord = s.next();
+
+            if (ID.equals(fadt_ID) && passWord.equals(fast_passWord)) {
+                System.out.println("恭喜你!登陆成功!");
+                User_Inter();
+                break;
+            } else {
+                System.out.println("密码错误!请重新输入!您还有" + (2 - i) + "次机会!");
+            }
+        }
+    }
+}
+