Java 源碼混淆工具，ProGuard 4.8 發布

ProGuard 是一個免費的 Java類文件的壓縮，優化，混肴器。它刪除沒有用的類，字段，方法與屬性。使字節碼最大程度地優化，使用簡短且無意義的名字來重命名類、字段和方法 。eclipse已經把Proguard集成在一起了。

ProGuard 4.8 發布了，該版本修復了配置解析、優化和混淆方面的一些小問題，對 Ant Task 做了一些小改進。具體如下：

• Added more peephole optimizations for strings.
• Added support for multiple external configuration files in Ant configurations.
• Added support for Ant properties in external configuration files.
• Fixed parsing of empty file filters on input and output.
• Fixed parsing of '*' wildcard for file filters and name filters.
• Fixed obfuscation of private methods that are overridden in concrete classes with intermediary abstract classes and interfaces (workaround for Oracle bugs #6691741 and #6684387).
• Fixed optimization of complex finally blocks, compiled with JDK 1.4 or earlier.
• Fixed optimizing signatures of methods that are marked as not having side effects.
• Fixed optimization of long local variables possibly causing verification error for register pairs.
• Fixed merging of classes defined inside methods.
• Fixed stack consistency in optimization step.
• No longer removing debug information about unused parameters, for -keepparameternames or -keepattributes.
• Fixed updating manifest files with carriage return characters.
• Now removing unreachable code in preverification step.
• Improved default regular expression for stack traces in ReTrace.
• Updated documentation and examples.

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