编写一段代码，使得这段代码必定会产生死锁
使用Thread.sleep
以下是一个经典的 Java 死锁实现，通过两个线程互相持有对方需要的锁来确保必定发生死锁：
public class DeadlockDemo {
// 创建两个锁对象
private static final Object lock1 = new Object();
private static final Object lock2 = new Object();
public static void main(String[] args) {
// 线程1：先获取lock1，再尝试获取lock2
Thread thread1 = new Thread(() -> {
synchronized (lock1) {
System.out.println("线程1持有lock1，等待lock2...");
try {
Thread.sleep(10000); // 等个10秒增加死锁概率
} catch (InterruptedException e) {
e.printStackTrace();
}
synchronized (lock2) {
System.out.println("线程1成功获取lock2");
}
}
});
// 线程2：先获取lock2，再尝试获取lock1
Thread thread2 = new Thread(() -> {
synchronized (lock2) {
System.out.println("线程2持有lock2，等待lock1...");
try {
Thread.sleep(10000); // 等个10秒增加死锁概率
} catch (InterruptedException e) {
e.printStackTrace();
}
synchronized (lock1) {
System.out.println("线程2成功获取lock1");
}
}
});
thread1.start();
thread2.start();
try {
thread1.join();
thread2.join();
} catch (InterruptedException e) {
e.printStackTrace();
}
System.out.println("程序正常结束（这行永远不会执行）");
}
}