多线程练习,深刻体会了一次变量的BUG.

 package ltb20180106;
 
 public class TestBankThread {
 
     private int deposit=0;//注意全局变量的摆放.
 
     public TestBankThread() {
 
     }
 
       class BankThread implements Runnable{ 
 
           public BankThread() {
 
           }
 
           public void setDeposit(int money) {
 
               deposit+=money;
 
           }
 
           public int getMoney(int m) { 
 
               deposit=deposit-m;
 
               if(deposit<0) {
 
                   System.out.println("ATM余额不足!!!"+deposit);
 
               }
 
               return m;
           }
 
           public int getBank() {
 
               return deposit;
           }
 
           public void run() {
 
               this.setDeposit(200);
 
               System.out.println("ATM现有存款"+this.getBank());
 
           }
       }
 
      class A extends BankThread {
 
          private int a=0;
 
          public A() {
 
          }
 
          public void setA(int i) {
 
              a=a+i;
          }
 
          public int getA() {
 
              return a;
          }
 
          public void run() {
 
              this.setA(super.getMoney(200));
              System.out.println("A从ATM取出:"+this.getA());
              System.out.println("ATM现在是"+this.getBank());
              this.setA(100);
              System.out.println("在存入A100元最后是:"+a);
              super.setDeposit(getA());
              System.out.println("存入ATM后:"+super.getBank());
          }
 
      }
 
      class B  extends BankThread {
 
          private int b=0;//余额
          private int k=0;//取款数额
          public B() {
 
          }
 
        public void setB(int i) {
 
              b=b+i;
          }
 
        public int getB(int j) {
 
            b=b-j;
 
            if(j>b) {
 
                System.out.println("类B:余额不足了");
            }
 
             k=j;
 
            return j;
        }
 
          public int getB() {
 
              return b;
 
          }
 
          public int getK() {
 
              return k;
          }
 
          public void run() {
 
             this.setB(super.getMoney(300));
             System.out.println("B从ATM取走"+this.getB()+"元");
             this.getB(50);
             super.setDeposit(this.getB());
             System.out.println("B取款"+this.getK()+"元,花掉了.");
             System.out.println("ATM当前存款:"+super.getBank());
 
          }
 
      }
 
     public static void main(String[] args) {
 
      TestBankThread tb=new TestBankThread();
 
        Thread t1=new Thread(tb.new BankThread());
         t1.start();
        Thread t2=new Thread(tb.new A());
        t2.start();
        Thread t3=new Thread(tb.new B());
         t3.start();
 
     }
 
 }