如何选择是使用Exception还是RuntimeException呢？
Java中的Exception来源于C++但是又于C++不同。C++只有一类Exception基类，但是Java有Exception和RuntimeException，虽然RuntimeException也是直接继承自Exception，两者之间的差异在于，RuntimeException可以不必在方法声明时声明，而由JVM内在的机制处理此类异常，此类异常一般意味着开发人员的编码错误等。
以下三点有助于在使用异常机制时，该如何选择...
JIT（Just-In-Time）編譯器
JIT（Just-In-Time）編譯器
用來提高應用程序性能的最簡單的工具是Just-In-Time(JIT)實時編譯器。JIT是一個可將Java字節碼轉換為本地機器碼的代碼生成器。由JIT調用的Java程序，其運行速度通常要比由解釋程序執行字節碼時的速度高得多。JIT編譯器首先是在Java開發工具包（JDK™）1.1.6中作為一種性能更新出現的，而現在它是你在Java 2平台上使用Java解釋程序命令時調用的標準工具。你可以使用Java虛擬機的-D...
思考
IT浪潮里总是日新月异的冒出许许多多的技术，纷繁复杂的概念搅得人无从是从。
静下心来思考，自己为什么会选择IT行业呢？那是因为自己对这个行业的深深喜爱。深刻检讨，我究竟喜欢什么呢？从最早的仙剑奇侠传开始，我梦想过自己能开发出如此动人的游戏，我的武侠梦等等似乎也能从RPG游戏中得到虚幻的满足。从文曲星上的小游戏开始编程，到恰逢那时候出来了魔兽世界，一切一切似乎都很美好。短短几年之间，...
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