Java多线程(五)-线程同步(同步方法)

public class Unsafe2 {
    public static void main(String[] args) {
        Account account = new Account(200,"home");
        // 创建家庭账户一共有200w
        GetMoney boy = new GetMoney(account,200,"boy");
        GetMoney girl = new GetMoney(account,50,"girl");
        boy.start();
        girl.start();
    }
}

class Account{

    int money;
    String id;

    public Account(int money, String id) {
        this.money = money;
        this.id = id;
    }
}

class GetMoney extends Thread{

    Account account;
    int get;
    // 取了多少
    int now;
    // 现余多少

    public GetMoney(Account account, int get,String name) {
        super(name);
        this.account = account;
        this.get = get;
    }

    @Override
    public void run() {
        
        synchronized (account){
            if (account.money - get < 0){
                System.out.println(Thread.currentThread().getName()+":money is not enough");
                return;
            }
            try {
                Thread.sleep(1000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            account.money = account.money - get;
            now = now + get;
            System.out.println(account.id+"-account-money:"+account.money);
            System.out.println(Thread.currentThread().getName()+"-now:"+now);
        }
    }
}

home-account-money:0
boy-now:200
girl:money is not enough