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摘要： Reference: [1] http://www.cnblogs.com/kevin2chen/p/6714214.html 当调用 java命令运行一个java程序时，会启动一个java虚拟机进程。同一个jvm的所有线程、所有变量都处于同一个进程里，都使用该jvm进程的内存区。 jvm进程终止， 阅读全文

摘要： Reference [1] http://www.cnblogs.com/youxia/p/java007.html Byte stream and Character stream 在 Java 中如果要把流中的数据按字节来访问，就应该使用 InputStream 和 OutputStream，如 阅读全文

摘要： Reference: [1] http://www.linuxjournal.com/article/6799 Soft vs. Hard CPU Affinity There are two types of CPU affinity. The first, soft affinity, also 阅读全文

摘要： 1. set -e "Exit immediately if a simple command exits with a non-zero status." When this option is on, if a simple command fails for any of the reason 阅读全文

摘要： Volatile Since Java 5 the volatile keyword guarantees more than just the reading from and writing to main memory of variables. Actually, the volatile 阅读全文

摘要： Opennstack Open source software for creating private and public clouds Manages the servers at these sites so you can create Virtual Machines (VMs) for 阅读全文

摘要： ArrayList vs LinkedList vs Vector From the hierarchy diagram, they all implement List interface. They are very similar to use. Their main difference i 阅读全文

摘要： Generational Collectors (分代收集器) GC algos optimised based on two hypotheses / observations: Most objects soon become unreachable - short lived. Referen 阅读全文

摘要： ctrl+shift+F : search in whole project ctrl+hover : check the field info in brief ctrl+Q : check the field info in detail ctrl+P: show the parameter i 阅读全文

摘要： Linux Essentials Certification Globbing ls ?.txt ? stands for one character while * means one or more characters ls [F]*.txt list file starting with F 阅读全文