摘要： 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 program counter register, JVM Stack, and Native Meth 阅读全文

摘要： reference：http://www.coolcoder.in/2014/01/getting-over-dangers-of-rm-command-in.htmlWhen we want to delete a directory and everything in it, we normally usually use rm -rf. However, this is a bad habit to get into. If you make a mistake, you could delete your entire partition.For a start, if you dro 阅读全文

摘要： http://viralpatel.net/blogs/useful-oracle-queries/Here’s a list of 40+ Useful Oracle queries that every Oracle developer must bookmark. These queries range from date manipulation, getting server info, get execution status, calculate database size etc.Date / Time related queriesGet the first day of t 阅读全文

摘要： 1. 在浏览器地址栏输入 about:config.弹出对话框：2.点击“我保证会小心”，弹出下面的对话框，在搜索栏中输入general.useragent.override，查看是否有user-agent。3. 如果没有general.useragent.override，则右键，新建字符串。否则右键修改该字符串的值。4. 添加键general.useragent.override，value 自定义的 阅读全文

摘要： 1.首先该工程最好是gui的，使用swing或者awt的都行。2.使用eclipse打包jar文件。 项目名字上面点右键，选择Export，在选择java\JAR file。 选择src文件夹，.classpath和.project不选 去掉Export class files withcompile errors（编译错误时也输出class文件）的选项 在main class中选择含有main方法的类，单击finish。3. 新建一个文件夹，将jar包和安装jdk下的jre目录文件拷贝到该目录下，同时将jar拷贝到该目录下。4. 在上述目录下建立一个.bat文件，编辑如下： start ja 阅读全文