java虚拟机在执行java程序的过程中会把它所管理的内存划分为若干个区域,这些区域都有各自的用途,以及创建和销毁的时间,有的区域随着虚拟机进程的启动而存在,有些区域则依赖着用户的线程的启动和结束而建立和销毁.根据java 虚拟机规范的规定,java虚拟机所管理的内存将会包括以下几个运行时数据区域. 如下图所示: java虚拟机运行时数据区可以分为: 程序计数器  堆  方法区  运行时常量池  本地方法栈  java虚拟机栈.其中程序计数器.java栈.本地方法栈,是根据线程的启动而创建的:而…

前言 本文主要介绍JVM的运行时数据区 来自Oracle文档 Java Virtual Machine Specification -- Chapter 2. The Structure of the Java Virtual Machine 2.5 Link : http://docs.oracle.com/javase/specs/jvms/se7/html/jvms-2.html#jvms-2.5 ----------------------------------------------…

Ref: JVM Run-Time Data Areas class SimpleThread extends Thread { public SimpleThread(String name) { super(name); } public void run() { for(int i = 0; i < 50; i++) //every 'i' variable corresponds to an individual thread,that is,each thread contains i…

http://www.programcreek.com/2013/04/jvm-run-time-data-areas/ This is my note of reading JVM specification. I draw a diagram which helps me understand. 1. Data Areas for Each Individual Thread (not shared) Data Areas for each individual thread include…

没有安装java的童鞋可以先去安装一下,地址:https://www.java.com/zh_CN/ 安装之后还是提示如下错误: ➜ elasticsearch-2.4.3 bin/elasticsearch No Java runtime present, requesting install. ➜ elasticsearch-2.4.3 java -version No Java runtime present, requesting install. 执行如下解决方案: # 首先 cd e…

1,报错截图 2,报错信息 五月 08, 2018 9:57:58 上午 org.apache.tomcat.util.digester.SetPropertiesRule begin 警告: [SetPropertiesRule]{Server/Service/Engine/Host/Context} Setting property 'source' to 'org.eclipse.jst.jee.server:MyCastBox' did not find a matching prope…

java: Runtime和Process调用本机程序 调用纸牌程序,Process用来销毁程序 import java.io.IOException; public class RunTimeDemo { public static void main(String args[]) throws Exception { Runtime rt = Runtime.getRuntime(); Process pro = rt.exec("freecell.exe"); Thread.sl…

Java Runtime.availableProcessors()方法用法实例教程.   描述 java.lang.Runtime.availableProcessors() 方法返回到Java虚拟机的可用的处理器数量.此值可能会改变在一个特定的虚拟机调用.应用程序可用处理器的数量是敏感的,因此偶尔查询该属性,并适当地调整自己的资源使用情况. 声明 以下是声明java.lang.Runtime.availableProcessors()方法 public int availableProces…

几天做项目,生成一堆注解的实体,当实体数超过86个时,jvm报错: # # A fatal error has been detected by the Java Runtime Environment: # #  Internal Error (c1_Optimizer.cpp:271), pid=5104, tid=6488 #  guarantee(x_compare_res != Constant::not_comparable) failed: incomparable constan…

系统环境:win7 64bit JDK:jdk-7u79-windows-x64 Eclipse:eclipse-jee-helios-win32 启动eclipse:弹出A Java Runtime Evironment(JRE) or Java Development Kit(JDK).... 只需要明确一点:不论计算机系统是多少位的,jdk和eclipse位数必须一致! 总结:之所以弹出上述的弹框就是jdk和eclipse版本不匹配!…