Java JVM_第76页-阿里云

Java刷题知识点之什么是进程、什么是线程、什么是多线程、多线程的好处和弊端、多线程的创建方式、JVM中的多线程解析、多线程运行图解

什么是进程？　　正在进行中的程序(直译)。什么是线程？　　就是进程中一个负责程序执行的控制单元(执行路径)。　　见一个进程中可以多执行路径，称之为多线程。什么是多线程？　　一个进程中至少要有一个线程。　　开启多个线程是为了同时运行多...

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The environment variable JAVA_HOME(with the value of xxx) does not point to a valid JVM installation

电脑上的IntelliJ IDEA有段时间没用了，今天有朋友在相关文章 IntelliJ IDEA 运行你的第一个Java应用程序中提出问题，我就打开IntelliJ IDEA看看，结果提示以下信息： The environment variable JAVA_HOME(with the...

java多线程之：深入JVM锁机制2-Lock （转载）

前文（深入JVM锁机制-synchronized）分析了JVM中的synchronized实现，本文继续分析JVM中的另一种锁Lock的实现。与synchronized不同的是，Lock完全用Java写成，在java这个层面是无关JVM实现的。在 java.util.concurrent.lock...

【JVM调优（一）】----JAVA内存模型抽象结构

线程之间的通信机制有两种：共享内存和消息传递。 Java线程之间的通信由Java内存模型（JMM）控制，JMM控制一个线程对共享变量的写入什么时候对另一个线程可见。下图是JMM的抽象结构： &...

深入理解Java虚拟机:JVM高级特性与最佳实践

目录 [ - ] 《深入理解Java虚拟机:JVM高级特性与最佳实践》前言《深入理解Java虚拟机:JVM高级特性与最佳实践》内容特色《深入理解Java虚拟机:JVM高级特性与最佳实践》目录第1章走近Java 1.1　概述 1.2　Java技术体系 1.3　Java发展史 1.4...

Java千百问_07JVM架构（001）_java内存模型是什么样的

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JVM学习（4）——全面总结Java的GC算法和回收机制

　　引用实例被添加在引用队列中，可以在任何时候通过查询引用队列回收对象。　　　　现在我对一个对象的生命周期进行描述：　　新建Java对象A首先处于可达的，未执行finalize方法的状态，随着程序的运行，一些引用关系会消失，或者变迁，当对A使用可达性算法判断，对象A变成了 GC Ro...

JVM学习（3）——总结Java内存模型

俗话说，自己写的代码，6个月后也是别人的代码……复习！复习！复习！涉及到的知识点总结如下：为什么学习Java的内存模式缓存一致性问题什么是内存模型 JMM（Java Memory Model）简介 volatitle关键字原子性可见性有序性指令重排先行发生——happen-befor...

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