Java多线程同步实例与技术解答

本示例演示了如何使用Java中的synchronized关键字实现多线程同步，避免竞态条件。通过简单的银行账户取款场景，确保多个线程安全地更新账户余额。

public class BankAccount {
    private int balance = 1000;

    public synchronized void withdraw(int amount) {
        if (amount > 0 && balance >= amount) {
            balance -= amount;
            System.out.println("成功取款：" + amount + " 元，余额：" + balance + " 元");
        } else {
            System.out.println("取款失败，余额不足");
        }
    }

    public static void main(String[] args) {
        BankAccount account = new BankAccount();

        // 创建两个线程模拟两个用户同时取款
        Thread user1 = new Thread(() -> account.withdraw(500));
        Thread user2 = new Thread(() -> account.withdraw(700));

        user1.start();
        user2.start();
    }
}

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