单项选择题
A.String regex=""；
B.String regex=" ."；
C.String regex=".*"；
D.String regex="\\s"；
E.String regex="\\.\\s*"；
F.String regex="\\w[\.]+"；
单项选择题 Given: What is the result when the programmer attempts to compile the code and run it with the command java Converter 12?（）
单项选择题 Given that the current directory is empty, and that the user has read and write permissions, and the following: Which statement is true?（）
单项选择题 Given: Which code fragment, inserted at line 24, outputs "123abc 123abc"?（）
