模拟网上取钱

「爱情、让人受尽委屈。」 2022-11-17 10:06 154阅读 0赞

## 模拟网上取钱 ##

题目:小明银行卡有10000元  
小明老婆和小明女儿和小明进行存储.

package org.thread.demo.acount;
    import java.util.Scanner;
    public class Test { 
              public static void main(String[] args) { 
                       /** * 创建账号信息 * */
                       Account account = new Account();
                       account.setAmount(10000);
                       
                       /**小明信息*/
                       Scanner sc = new Scanner(System.in);
                       System.out.println("小明输入账号");
                       String account0 = sc.next();
                       System.out.println("小明输入密码");
                       String password0 = sc.next();
                       System.out.println("1取钱 2 存钱");
                       String operation = sc.next();
                       System.out.println("输入金额");
                       double unit = sc.nextInt();
                       account.setAccount(account0);
                       account.setPassword(password0);
                       
                       /**小明老婆信息*/
                       System.out.println("小明老婆输入账号");
                       String account1 = sc.next();
                       System.out.println("小明老婆输入密码");
                       String password1 = sc.next();
                       System.out.println("1取钱 2 存钱");
                       String operation1 = sc.next();
                       System.out.println("输入金额");
                       double unit1 = sc.nextInt();
                       account.setAccount(account1);
                       account.setPassword(password1);
                       
                       /**小明女儿*/
                       System.out.println("小明女儿输入账号");
                       String account2 = sc.next();
                       System.out.println("小明女儿输入密码");
                       String password2 = sc.next();
                       System.out.println("1取钱 2 存钱");
                       String operation2 = sc.next();
                       System.out.println("输入金额");
                       double unit2 = sc.nextInt();
                       account.setAccount(account2);
                       account.setPassword(password2);
                       
                       
                       DrawBinkThread th1 = new DrawBinkThread(account,operation,unit);
                       DrawBinkThread th2 = new DrawBinkThread(account,operation1,unit1);
                       DrawBinkThread th3 = new DrawBinkThread(account,operation2,unit2);
                       th1.setName("小明");
                       th2.setName("小明老婆");
                       th3.setName("小明女儿");
                       /**线程准备*/
                       th1.start();
                       th2.start();
                       th3.start();
                       
              }
    }

package org.thread.demo.acount;
    public class DrawBinkThread extends Thread{ 
              private Account account;
              
              private String opertion;
              
              private double  unit;
              
              public DrawBinkThread(Account account, String opertion, double unit) { 
                       super();
                       this.account = account;
                       this.opertion = opertion;
                       this.unit = unit;
              }
              public void setAccount(Account account) { 
                       this.account = account;
              }
              @Override
              public void run() { 
                       account.suspend(account,opertion,unit);
                       System.out.println(this.getName()+"取完钱余额为"+account.getAmount());
              }
              public String getOpertion() { 
                       return opertion;
              }
              public void setOpertion(String opertion) { 
                       this.opertion = opertion;
              }
              public double getUnit() { 
                       return unit;
              }
              public void setUnit(double unit) { 
                       this.unit = unit;
              }
              public Account getAccount() { 
                       return account;
              }
    }

package org.thread.demo.acount;
    /** * 银行账号类 * * */
    public class Account { 
              //账号
              private String account;
              //密码
              private String password;
              //余额
              private volatile  double amount;
              
              /** * 取存 * */
              //加上同步机制使得线程安全
              /*方法一 public synchronized void suspend(Account z, String x ,double y) { */
              public  void suspend(Account z, String x ,double y) { 
                       /**方法2*/
                       synchronized (z) { 
                                 if(y<=z.getAmount() && z.getAccount().equals("1") && z.getPassword().equals("1")) { 
                                          if(x.equals("1")) { 
                                                    //取现
                                                    try { 
                                                              //来一段线程不安全的代码 在睡眠的时候同时取一万的人都进来了,卡里余额变成负数
                                                              /** * 1网略不好的时候 * cpu把资源给别的线程 * */
                                                              Thread.sleep(1000);
                                                    } catch (InterruptedException e) { 
                                                              // TODO Auto-generated catch block
                                                              e.printStackTrace();
                                                    }
                                                    amount=amount-y;
                                                    this.setAmount(amount);
                                          }
                                          if(x.equals("2")){ 
                                                    amount=amount+y;
                                                    this.setAmount(amount);
                                          }
                                 }else { 
                                          System.out.println(Thread.currentThread().getName()+"信息有误");
                                 }
                       }
              }
              
              public String getAccount() { 
                       return account;
              }
              public void setAccount(String account) { 
                       this.account = account;
              }
              public String getPassword() { 
                       return password;
              }
              public void setPassword(String password) { 
                       this.password = password;
              }
              public double getAmount() { 
                       return amount;
              }
              public void setAmount(double amount) { 
                       this.amount = amount;
              }
              @Override
              public String toString() { 
                       return "Account [account=" + account + ", password=" + password + ", amount=" + amount + "]";
              }
    }