線程的同步案例

1.銀行有一個賬戶，有兩個儲戶分别向同一個賬戶存3000元，存3次。每次存完列印賬戶餘額。

public class AccountTest {
    public static void main(String[] args){
        Account acct=new Account(1000);
        Customer c1=new Customer(acct);
        Customer c2=new Customer(acct);

        c1.setName("甲");
        c2.setName("乙");

        c1.start();
        c2.start();

    }
}

class Account{
    private double balance;

    public Account(double balance){
        this.balance=balance;
    }

    //存錢
    public synchronized void deposit(double amt){
        if (amt>0){
            balance+=amt;

            try {
                Thread.sleep(1000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            System.out.println(Thread.currentThread().getName()+"存錢成功。餘額為："+balance);
        }
    }
}

class Customer extends Thread{
    private Account acct;

    public Customer(Account acct){
        this.acct=acct;
    }

    @Override
    public void run() {
        for (int i=0;i<3;i++){
            acct.deposit(100);
        }

    }
}