Base64解码 @param s 编码好的base64 @return 结果

Add source code to the compiler @param className @param sourceCode @return @throws Exception @see {@link #compileAll()}

Compile single source @param className @param sourceCode @return @throws Exception

Compile all sources @return Map containing instances of all compiled classes @throws Exception

得到某个字符，在编码表的位置 @param i 字符 @return 编号

Creates a new instance of ForwardingJavaFileManager. @param fileManager delegate to this file manager @param cl

@return the class loader used internally by the compiler

Ignore non-critical compiler output, like unchecked/unsafe operation warnings. @return

Options used by the compiler, e.g. '-Xlint:unchecked'. @param options @return