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java并发编程读书笔记
java并发编程读书笔记
java并发编程读书笔记
(1)-对象的共享
对于每个包含多个变量的不变条件,其中涉及的多有变量都需要由同一个锁来保护
java
内存模型要求变量的读取操作和写入操作都必须是原子操作,但对于非volatile类型的64位数值变量(double,long),jvm允许将64位的
读
操作或写操作分解为两个32...
java并发编程读书笔记
(1)-对象的共享
对于每个包含多个变量的不变条件,其中涉及的多有变量都需要由同一个锁来保护
java
内存模型要求变量的读取操作和写入操作都必须是原子操作,但对于非volatile类型的64位数值变量(double,long),jvm允许将64位的
读
操作或写操作分解为两个32...
Java并发编程
艺术-
读书笔记
(一)
https://blog.csdn.net/a724888/article/details/63683054
并发编程
的挑战 1上下文切换。cpu通过时间片分配算法来执行任务,从一个任务切换到另一个任务时会保留上个任务的状态。多线程切换上下文开销大,不一定比单线程快。减少上下文切换...
Java并发编程
艺术-
读书笔记
(二)
https://blog.csdn.net/a724888/article/details/64214595
java并发编程
艺术2 java并发机制的底层实现。java-》编译——》。class字节码-》字节码加载到JVM-》字节码转化为汇编让cpu执行。1volatile:2volatile的定义 3volatile追加...
Java并发编程
艺术-
读书笔记
(三)
非公平:不论是否可以获取锁,先用cas操作
读
volatile变量
并
修改。于是这两个锁都有volatile的读写语义。什么是cas?cas操作就是比较
并
交换,可以用这个原理实现原子操作,但是本身存在一些不足。新版jdk解决了cas操作所存在的一些问题,...
《
Java并发编程
实战》第十四章 构建自己定义的同步工具
读书笔记
4 通知 5 演示样例:阀门类 6 子类的安全问题 7 封装条件队列 8 入口协议与出口协议 三、显式的Condition对象 四、Synchronizer剖析 五、AbstractQueuedSynchronizer 六、
java
.util.concurrent同步器类中的 AQS 1 ReentrantLock 2 ...
1
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Dragonwell
Alibaba Dragonwell 是一款免费的, 生产就绪型Open JDK 发行版,提供长期支持,包括性能增强和安全修复。完全兼容 Java SE 标准,您可以在任何常用操作系统(包括 Linux、Windows 和 macOS)上开发 Java 应用程序。
立即下载
了解更多
开发者必备
必备 IDE 插件
应用托管平台
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Dragonwell
Alibaba Dragonwell 是一款免费的, 生产就绪型Open JDK 发行版,提供长期支持,包括性能增强和安全修复。完全兼容 Java SE 标准,您可以在任何常用操作系统(包括 Linux、Windows 和 macOS)上开发 Java 应用程序。
立即下载
了解更多
开发者必备
必备 IDE 插件
应用托管平台