class java/lang/String
replace
 (CC)Ljava/lang/String;
 (CC)L1java/lang/String;
split
 (Ljava/lang/String;)[Ljava/lang/String;
 (Ljava/lang/String;)[L1java/lang/String;
substring
 (II)Ljava/lang/String;
 (II)L1java/lang/String;