Skip to content

Instantly share code, notes, and snippets.

doubledouble

Block or report user

Report or block doubledouble

Hide content and notifications from this user.

Learn more about blocking users

Contact Support about this user’s behavior.

Learn more about reporting abuse

Report abuse
View GitHub Profile
View jvm内存模型
jvm内存模型
---JMM就是java解决多线程下内存共享的一个模型,与内存分区管理是不同的层面!
根据线程私有和线程共享来看:
线程私有:
---程序计数器:如果正在执行Java方法,则指向虚拟机字节码指令的地址,如果是native的,这个计算器的值为空。
---虚拟机栈:保存本地变量、操作数栈、动态链接、方法出口等信息。为执行java方法服务。
View lock
自旋锁
自适应自旋
锁消除 (eg 方法体内)
锁粗化
轻量级锁 (CAS)
偏向锁
View back.html
<html>
<div id="header">
<a href="javascript:document.getElementById('my_iframe').contentWindow.history.back();" target="iframe">返回</a>
</div>
<div id="main">
<iframe id="my_iframe">内容</iframe>
</div>
</html>
View validate.addmethod.js
var vcity={ 11:"北京",12:"天津",13:"河北",14:"山西",15:"内蒙古",
21:"辽宁",22:"吉林",23:"黑龙江",31:"上海",32:"江苏",
33:"浙江",34:"安徽",35:"福建",36:"江西",37:"山东",41:"河南",
42:"湖北",43:"湖南",44:"广东",45:"广西",46:"海南",50:"重庆",
51:"四川",52:"贵州",53:"云南",54:"西藏",61:"陕西",62:"甘肃",
63:"青海",64:"宁夏",65:"新疆",71:"台湾",81:"香港",82:"澳门",91:"国外"
};
isIdCardNo = function(card)
{
@doubledouble
doubledouble / ALG.java
Last active Dec 14, 2015
插入排序,归并排序
View ALG.java
package test.algorithm;
import java.util.Arrays;
/**
* from wiki http://zh.wikipedia.org/wiki/插入排序
* http://zh.wikipedia.org/wiki/归并排序
**/
public class ALG {
@doubledouble
doubledouble / SynchronizedTest.java
Created Mar 4, 2013
SynchronizedTest 4个线程 2个加一,2个减一
View SynchronizedTest.java
package test;
public class SynchronizedTest {
public static void main(String[] args) {
J j = new J();
Thread inc1 = new Thread(new IncrementThread(j), "inc1");
Thread inc2 = new Thread(new IncrementThread(j), "inc2");
Thread dec1 = new Thread(new DecrementThread(j), "dec1");
Thread dec2 = new Thread(new DecrementThread(j), "dec2");
@doubledouble
doubledouble / LoaderTest.java
Last active Dec 14, 2015
Java父类子类加载
View LoaderTest.java
package test;
/**
*
* @author Administrator
*
*/
public class LoaderTest {
View builder模式.md
View shortcut.md
@doubledouble
doubledouble / linux 网卡.md
Last active Dec 14, 2015
centos 网卡相关问题
View linux 网卡.md
You can’t perform that action at this time.