并发HashMap的默认段值是16。
示例代码如下:
import java.util.concurrent.ConcurrentHashMap;
public class ConcurrentHashMapExample {
public static void main(String[] args) {
ConcurrentHashMap map = new ConcurrentHashMap<>();
// 获取并发HashMap的默认段值
int segments = map.getSegments().length;
System.out.println("默认段值:" + segments);
}
}