修改映射并迭代键集时,Java ConcurentMap keySet()问题

import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;

public class Main {
    public static void main(String[] args) {
        // 创建一个线程安全的ConcurrentMap
        Map<String, String> concurrentMap = new ConcurrentHashMap<>();

        // 添加一些元素到ConcurrentMap
        concurrentMap.put("key1", "value1");
        concurrentMap.put("key2", "value2");
        concurrentMap.put("key3", "value3");

        // 将ConcurrentMap转换为线程安全的Map
        Map<String, String> synchronizedMap = Collections.synchronizedMap(concurrentMap);

        // 迭代线程安全的Map
        synchronized (synchronizedMap) {
            for (String key : synchronizedMap.keySet()) {
                System.out.println("Key: " + key + ", Value: " + synchronizedMap.get(key));
            }
        }
    }
}