java replace usage

. AA = sp.getScope String () Replace ( ",", ","); 
String [] = A aa.trim () Split ( ",");. 

In the process of doing import function, because it contains a table introducing Chinese character import failure, so it is necessary to convert Chinese characters into English characters, the beginning of time, after the conversion has failed 
is because the variable after not to cast into the bottom of the statement, the statement is required to accept before they can succeed