save1.java

介绍有关java的资料 课件 相当一本书籍 里面都是很基础的知识

//[例10.5]

class Account1                                 //帐户缓冲区
{
 private String name;
 private int value;

 void put(int i)                               //欲存入金额i
 {
  value=value+i;                               //存入时，value值增加
  }

 int get(int i)                               //欲取金额i，返回实际取到金额
 {
  if(value>i)
     value=value-i;                            //取走时，value值减少
  else                                         //帐户金额不够所取走时
     {
      i=value;
      value=0;                                 //取走全部所余金额
      }
  return i;
  }

  int howmatch()                               //查看帐户上现有金额
  {
   return value;
   }
 }

 class Save1 extends Thread                    //存款线程
 {
  private Account1 a1;
  private int amount;
  public Save1(Account1 a1,int amount)
  {
   this.a1=a1;
   this.amount=amount;
   }

   public void run()
   {
    int k=a1.howmatch();
    try
    {
     sleep(1);                                      //花费时间
     }

   catch(InterruptedException e)
   {
    System.out.println(e);
    }

   a1.put(amount);
   System.out.println("现有"+k+", 存入"+amount+", 金额"+a1.howmatch());
   }

   public static void main(String args[])
   {
    Account1 a1=new Account1();
    (new Save1(a1,100)).start();
    (new Save1(a1,200)).start();
    (new Fetch1(a1,500)).start();
    }
   }

  class Fetch1 extends Thread                        //取款线程
  {
   private Account1 a1;
   private int amount;
   public Fetch1(Account1 a1,int amount)
   {
    this.a1=a1;
    this.amount=amount;
    }

   public void run()
   {
    int k=a1.howmatch();
    try
    {
     sleep(1);                                        //花费时间
    }

   catch(InterruptedException e)
   {
    System.out.println(e);
    }

   System.out.println("现有"+k+", 取走"+a1.get(amount)+", 金额"+a1.howmatch());

   }

  }