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();

     }

 }