#include <iostream> #include <stdio.h> class ac { public: class bd; }; class ac::bd { public: struct fg; }; struct ac::bd:fg { int a = 1; }; int main() { return 0;
集群环境描述:HDFS集群处于HA模式下,同时启动了YARN\JN\KAFKA\ZK。 现象: FAILED: SemanticException Unable to determine if hdfs://s233/user/hive/warehouse/mydb.db/ext_calllogs_in_hbase is encrypted: java.lang.IllegalArgument
异常信息如下: Type Exception ReportMessage Handler dispatch failed; nested exception is java.lang.AbstractMethodError: Method com/mchange/v2/c3p0/impl/NewProxyPreparedStatement.isClosed()Z is abstractDescr
在网上查找原因,发现是非法关闭IDEA导致的。 Open Settings | Plugns and enable it. 在设置中enable JAVA EE和tomcat server即可。 参考: https://stackoverflow.com/questions/43607642/intellij-idea-plugin-errorproblems-found-loadin
Java实现 package com.zehin.map.util;public class GPSUtil { public static double pi = 3.1415926535897932384626; public static double x_pi = 3.14159265358979324 * 3000.0 / 180.0; public static double
gd_t定义在uboot/include/asm-arm/global_data.h /** (C) Copyright 2002* Wolfgang Denk, DENX Software Engineering, wd@denx.de.** See file CREDITS for list of people who contributed to this* project.** Th