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「大师课」搞定 Java 开发基础

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Java Spring Boot 2.6.0开发实战-1024程序员节创造营公益课

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Java Web开发-Web应用、Tomcat、HTTP请求与响应

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Java并发机制底层实现原理－synchronized

章节目录 synchronized的实现原理与应用 synchronized 重量级锁 1.6版本之前 synchronized 被称之为重量级锁 1.6版本对 synchronized 进行了优化，主要优化的点在于减少获得锁和释放锁带来的性能消耗，为实现这个目的引入了偏向锁、与轻量级锁。 ...

JAVA 【精】从底层分析RunTime出错，Cmd命令执行正常

奥特曼超人杜锦阳曾经说过：“宁可在法度外灭亡,不在法度中生存。” Cmd命令执行失败，可能大家开发中经常会有遇到如下问题，可是百度谷歌却出不来，博主踩的坑共享给大家：报错 CreateProcess error=2, ϵͳÕҲ»µ½ָ¶ JAVA cmd执行失败 JAVA RunTime报错，cm...

JAVA线程创建底层流程

下面让我们来大概的分析下一个Java线程启动后，底层的调用细节。环境：JDK:1.8 glibc:2-25 linux-kernel：...

Java 调用底层接口的几种方法

Java 调用底层接口 Java 调用底层接口要通过动态链接库进行，在windows下是dll文件，linux是so文件 Java调用动态库所需要关心的问题：如何装载文件，以及如何定位所要使用的方法；数据类型...

关于Java的一点感悟---底层开发者的上层学习感悟

这些年主要一直是搞C、C++，偏底层一些，一直想多了解一下上层的东西。于是利用业余时间，看了些Java方面的东西，也利用一些架构搭建了一些简单的程序，在此想简单的谈谈自己的一点感悟。 1.Java真的是非常方便。对于做惯了底层的我，依靠文档在文本编辑器中写程序，已经成为了习惯。一下子转换到Java这...

如何精确地测量java对象的大小-底层instrument API

关于java对象的大小测量，网上有很多例子，大多数是申请一个对象后开始做GC，后对比前后的大小，不过这样，虽然说这样测量对象的大小是可行的，不过未必是完全准确的，因为过程中包含对象本身的开销，也许你运气好，正好能碰上，差不多，不过这种测试往往显得十分的笨重，因为要写一堆代码才能测试一点点东西，而且只...

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