Java 7 introduced the Method Handles with the java.lang.invoke.MethodHandle and java.lang.invoke.MethodHandles classes. The Well-Grounded Java Developer (which I have previously reviewed) covers ...

Groovy 1.8 was recently released with a long list of new features. I focus on one of these new features, logger injection via new AST Transformations, in this post. Groovy 1.8 provides AST ...

大致流程：应用app =》日志记录器Logger =》日志处理器Handler =》完成日志输出。其中，Logger与Handler过程中，还穿插着日志过滤器Filter =》日志格式化组件Formatter =》日志输出级别Level等组件。 在resources下创建log4j.xml或者log4j.properties，如果都存在，则以xml为准。

android使用AndroidHandler将java.util.logging.Logger转化为了android.util.Log 为什么使用java.util.logging.Logger无法输出INFO以下level的日志 ...