| import sun.misc.Unsafe; | |
| import java.lang.reflect.Constructor; | |
| import java.lang.reflect.Field; | |
| import java.lang.reflect.InvocationTargetException; | |
| public class Foo { | |
| private boolean flag = true; | |
| public boolean getFlag() { |
| /** | |
| * Copyright (C) 2009-2010 Yichuan, Fuchun All rights reserved. | |
| * Licensed to the Apache Software Foundation (ASF) under one or more | |
| * contributor license agreements. See the NOTICE file distributed with | |
| * this work for additional information regarding copyright ownership. | |
| * The ASF licenses this file to You under the Apache License, Version 2.0 | |
| * (the "License"); you may not use this file except in compliance with | |
| * the License. You may obtain a copy of the License at | |
| * http://www.apache.org/licenses/LICENSE-2.0 | |
| * Unless required by applicable law or agreed to in writing, software |
| Linux pstree shows running processes as a tree. The tree is rooted at either pid or init if pid is omitted. If a user name is specified, all process trees rooted at processes owned by that user are shown. | |
| Install pstree | |
| #On Mac OS | |
| brew install pstree | |
| #On Fedora/Red Hat/CentOS | |
| yum install psmisc #using psmisc package for pstree | |
| #On Ubuntu/Debian APT |
| /** | |
| * Copyright 2015 Netflix, Inc. | |
| * | |
| * Licensed under the Apache License, Version 2.0 (the "License"); | |
| * you may not use this file except in compliance with the License. | |
| * You may obtain a copy of the License at | |
| * | |
| * http://www.apache.org/licenses/LICENSE-2.0 | |
| * | |
| * Unless required by applicable law or agreed to in writing, software |
having a web server turned on doesn't necessarily mean you are serving pages on the world wide web. its what allows you to load your own static files (.html, .js etc.) in a browser via http://.
if you're not sure whether or not you have a web server running, no problem! its easy to confirm.
| 正则匹配 | |
| 匹配中文字符的正则表达式： [\u4e00-\u9fa5] | |
| 评注：匹配中文还真是个头疼的事，有了这个表达式就好办了 | |
| 匹配双字节字符(包括汉字在内)：[^\x00-\xff] | |
| 评注：可以用来计算字符串的长度（一个双字节字符长度计2，ASCII字符计1） | |
| 匹配空白行的正则表达式：\n\s*\r | |
| 评注：可以用来删除空白行 |
| <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" | |
| xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> | |
| <modelVersion>4.0.0</modelVersion> | |
| <groupId>com.sample.project</groupId> | |
| <artifactId>groovy-sample</artifactId> | |
| <version>0.0.1-SNAPSHOT</version> | |
| <properties> | |
| <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> | |
| </properties> | |
| <dependencies> |
L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns
L2 cache reference ........................... 7 ns
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns
Compress 1K bytes with Zippy ............. 3,000 ns = 3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns = 20 µs
SSD random read ........................ 150,000 ns = 150 µs
Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs
| /** | |
| * Copyright (c) 2011 Red Hat, Inc. | |
| * | |
| * This software is licensed to you under the GNU General Public License, | |
| * version 2 (GPLv2). There is NO WARRANTY for this software, express or | |
| * implied, including the implied warranties of MERCHANTABILITY or FITNESS | |
| * FOR A PARTICULAR PURPOSE. You should have received a copy of GPLv2 | |
| * along with this software; if not, see | |
| * http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt. | |
| * |